[RFC,2/2,media] bcm2835-unicam: Driver for CCP2/CSI2 camera interface
Commit Message
Add driver for the Unicam camera receiver block on
BCM283x processors.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/media/platform/Kconfig | 1 +
drivers/media/platform/Makefile | 2 +
drivers/media/platform/bcm2835/Kconfig | 14 +
drivers/media/platform/bcm2835/Makefile | 3 +
drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100 ++++++++++++++++++++++
drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
6 files changed, 2377 insertions(+)
create mode 100644 drivers/media/platform/bcm2835/Kconfig
create mode 100644 drivers/media/platform/bcm2835/Makefile
create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
Comments
Hi Dave,
Here is a quick review of this driver. Once a v2 is posted I'll do a more thorough
check.
On 06/14/2017 05:15 PM, Dave Stevenson wrote:
> Add driver for the Unicam camera receiver block on
> BCM283x processors.
>
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
> ---
> drivers/media/platform/Kconfig | 1 +
> drivers/media/platform/Makefile | 2 +
> drivers/media/platform/bcm2835/Kconfig | 14 +
> drivers/media/platform/bcm2835/Makefile | 3 +
> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100 ++++++++++++++++++++++
> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
> 6 files changed, 2377 insertions(+)
> create mode 100644 drivers/media/platform/bcm2835/Kconfig
> create mode 100644 drivers/media/platform/bcm2835/Makefile
> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index 8da521a..1111aa9 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -135,6 +135,7 @@ source "drivers/media/platform/am437x/Kconfig"
> source "drivers/media/platform/xilinx/Kconfig"
> source "drivers/media/platform/rcar-vin/Kconfig"
> source "drivers/media/platform/atmel/Kconfig"
> +source "drivers/media/platform/bcm2835/Kconfig"
>
> config VIDEO_TI_CAL
> tristate "TI CAL (Camera Adaptation Layer) driver"
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index 6bbdf94..9c5e412 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -81,3 +81,5 @@ obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec/
> obj-$(CONFIG_VIDEO_MEDIATEK_MDP) += mtk-mdp/
>
> obj-$(CONFIG_VIDEO_MEDIATEK_JPEG) += mtk-jpeg/
> +
> +obj-y += bcm2835/
> diff --git a/drivers/media/platform/bcm2835/Kconfig b/drivers/media/platform/bcm2835/Kconfig
> new file mode 100644
> index 0000000..9f9be9e
> --- /dev/null
> +++ b/drivers/media/platform/bcm2835/Kconfig
> @@ -0,0 +1,14 @@
> +# Broadcom VideoCore4 V4L2 camera support
> +
> +config VIDEO_BCM2835_UNICAM
> + tristate "Broadcom BCM2835 Unicam video capture driver"
> + depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
> + depends on ARCH_BCM2708 || ARCH_BCM2709 || ARCH_BCM2835 || COMPILE_TEST
So this block is available on other broadcom SoCs as well? Not just the 2835?
Should the description of this Kconfig be adapted?
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_FWNODE
> + ---help---
> + Say Y here to enable V4L2 subdevice for CSI2 receiver.
> + This is a V4L2 subdevice that interfaces directly to the VC4 peripheral.
> +
> + To compile this driver as a module, choose M here. The module
> + will be called bcm2835-unicam.
> diff --git a/drivers/media/platform/bcm2835/Makefile b/drivers/media/platform/bcm2835/Makefile
> new file mode 100644
> index 0000000..a98aba0
> --- /dev/null
> +++ b/drivers/media/platform/bcm2835/Makefile
> @@ -0,0 +1,3 @@
> +# Makefile for BCM2835 Unicam driver
> +
> +obj-$(CONFIG_VIDEO_BCM2835_UNICAM) += bcm2835-unicam.o
> diff --git a/drivers/media/platform/bcm2835/bcm2835-unicam.c b/drivers/media/platform/bcm2835/bcm2835-unicam.c
> new file mode 100644
> index 0000000..26039da
> --- /dev/null
> +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
> @@ -0,0 +1,2100 @@
> +/*
> + * BCM2835 Unicam capture Driver
> + *
> + * Copyright (C) 2017 - Raspberry Pi (Trading) Ltd.
> + *
> + * Dave Stevenson <dave.stevenson@raspberrypi.org>
> + *
> + * Based on TI am437x driver by Benoit Parrot and Lad, Prabhakar and
> + * TI CAL camera interface driver by Benoit Parrot.
> + *
> + * This program is free software; you may redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; version 2 of the License.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/err.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/of_graph.h>
> +#include <linux/pinctrl/consumer.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/slab.h>
> +#include <linux/uaccess.h>
> +#include <linux/videodev2.h>
> +
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-dev.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/videobuf2-v4l2.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "vc4-regs-unicam.h"
> +
> +#define UNICAM_MODULE_NAME "unicam"
> +#define UNICAM_VERSION "0.1.0"
> +
> +static int debug;
> +module_param(debug, int, 0644);
> +MODULE_PARM_DESC(debug, "Debug level 0-3");
> +
> +#define unicam_dbg(level, dev, fmt, arg...) \
> + v4l2_dbg(level, debug, &(dev)->v4l2_dev, fmt, ##arg)
> +#define unicam_info(dev, fmt, arg...) \
> + v4l2_info(&(dev)->v4l2_dev, fmt, ##arg)
> +#define unicam_err(dev, fmt, arg...) \
> + v4l2_err(&(dev)->v4l2_dev, fmt, ##arg)
> +
> +/*
> + * Stride is a 16 bit register. Max width is therefore determined by
> + * that divided by the number of bits per pixel. Take 32bpp as a
> + * worst case.
> + * No imposed limit on the height, so adopt a square image for want
> + * of anything better.
> + */
> +#define MAX_WIDTH ((65536 / 4) - 1)
> +#define MAX_HEIGHT MAX_WIDTH
> +
> +#define DEFAULT_MAX_DATA_LANES 2
> +
> +/*
> + * struct unicam_fmt - Unicam media bus format information
> + * @pixelformat: V4L2 pixel format FCC identifier.
> + * @code: V4L2 media bus format code.
> + * @depth: Bits per pixel (when stored in memory).
> + * @csi_dt: CSI data type.
> + */
> +struct unicam_fmt {
> + u32 fourcc;
> + u32 code;
> + u8 depth;
> + u8 csi_dt;
> +};
> +
> +/*
> + * The peripheral can unpack and repack between several of
> + * the Bayer raw formats, so any Bayer format can be advertised
> + * as the same Bayer order in each of the supported bit depths.
> + * Use lower case to avoid clashing with V4L2_PIX_FMT_SGBRG8
> + * formats.
> + */
> +#define PIX_FMT_ALL_BGGR v4l2_fourcc('b', 'g', 'g', 'r')
> +#define PIX_FMT_ALL_RGGB v4l2_fourcc('r', 'g', 'g', 'b')
> +#define PIX_FMT_ALL_GBRG v4l2_fourcc('g', 'b', 'r', 'g')
> +#define PIX_FMT_ALL_GRBG v4l2_fourcc('g', 'r', 'b', 'g')
> +
> +static const struct unicam_fmt formats[] = {
> + /* YUV Formats */
> + {
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .code = MEDIA_BUS_FMT_YUYV8_2X8,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_UYVY,
> + .code = MEDIA_BUS_FMT_UYVY8_2X8,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_YVYU,
> + .code = MEDIA_BUS_FMT_YVYU8_2X8,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_VYUY,
> + .code = MEDIA_BUS_FMT_VYUY8_2X8,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .code = MEDIA_BUS_FMT_YUYV8_1X16,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_UYVY,
> + .code = MEDIA_BUS_FMT_UYVY8_1X16,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_YVYU,
> + .code = MEDIA_BUS_FMT_YVYU8_1X16,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + .fourcc = V4L2_PIX_FMT_VYUY,
> + .code = MEDIA_BUS_FMT_VYUY8_1X16,
> + .depth = 16,
> + .csi_dt = 0x1e,
> + }, {
> + /* RGB Formats */
> + .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
> + .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
> + .depth = 16,
> + .csi_dt = 0x22,
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
> + .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
> + .depth = 16,
> + .csi_dt = 0x22
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
> + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
> + .depth = 16,
> + .csi_dt = 0x21,
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
> + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
> + .depth = 16,
> + .csi_dt = 0x21,
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */
> + .code = MEDIA_BUS_FMT_RGB888_1X24,
> + .depth = 24,
> + .csi_dt = 0x24,
> + }, {
> + .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */
> + .code = MEDIA_BUS_FMT_BGR888_1X24,
> + .depth = 24,
> + .csi_dt = 0x24,
> + }, {
> + .fourcc = V4L2_PIX_FMT_RGB32, /* argb */
> + .code = MEDIA_BUS_FMT_ARGB8888_1X32,
> + .depth = 32,
> + .csi_dt = 0x0,
> + }, {
> + /* Bayer Formats */
> + .fourcc = PIX_FMT_ALL_BGGR,
> + .code = MEDIA_BUS_FMT_SBGGR8_1X8,
> + .depth = 8,
> + .csi_dt = 0x2a,
> + }, {
> + .fourcc = PIX_FMT_ALL_GBRG,
> + .code = MEDIA_BUS_FMT_SGBRG8_1X8,
> + .depth = 8,
> + .csi_dt = 0x2a,
> + }, {
> + .fourcc = PIX_FMT_ALL_GRBG,
> + .code = MEDIA_BUS_FMT_SGRBG8_1X8,
> + .depth = 8,
> + .csi_dt = 0x2a,
> + }, {
> + .fourcc = PIX_FMT_ALL_RGGB,
> + .code = MEDIA_BUS_FMT_SRGGB8_1X8,
> + .depth = 8,
> + .csi_dt = 0x2a,
> + }, {
> + .fourcc = PIX_FMT_ALL_BGGR,
> + .code = MEDIA_BUS_FMT_SBGGR10_1X10,
> + .depth = 10,
> + .csi_dt = 0x2b,
> + }, {
> + .fourcc = PIX_FMT_ALL_GBRG,
> + .code = MEDIA_BUS_FMT_SGBRG10_1X10,
> + .depth = 10,
> + .csi_dt = 0x2b,
> + }, {
> + .fourcc = PIX_FMT_ALL_GRBG,
> + .code = MEDIA_BUS_FMT_SGRBG10_1X10,
> + .depth = 10,
> + .csi_dt = 0x2b,
> + }, {
> + .fourcc = PIX_FMT_ALL_RGGB,
> + .code = MEDIA_BUS_FMT_SRGGB10_1X10,
> + .depth = 10,
> + .csi_dt = 0x2b,
> + }, {
> + .fourcc = PIX_FMT_ALL_BGGR,
> + .code = MEDIA_BUS_FMT_SBGGR12_1X12,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_GBRG,
> + .code = MEDIA_BUS_FMT_SGBRG12_1X12,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_GRBG,
> + .code = MEDIA_BUS_FMT_SGRBG12_1X12,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_RGGB,
> + .code = MEDIA_BUS_FMT_SRGGB12_1X12,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_RGGB,
> + .code = MEDIA_BUS_FMT_SRGGB16_1X16,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_GBRG,
> + .code = MEDIA_BUS_FMT_SGBRG16_1X16,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_GBRG,
> + .code = MEDIA_BUS_FMT_SGRBG16_1X16,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + }, {
> + .fourcc = PIX_FMT_ALL_GRBG,
> + .code = MEDIA_BUS_FMT_SGRBG16_1X16,
> + .depth = 12,
> + .csi_dt = 0x2c,
> + },
> +};
> +
> +struct bayer_fmt {
> + u32 fourcc;
> + u8 depth;
> +};
> +
> +const struct bayer_fmt all_bayer_bggr[] = {
> + {V4L2_PIX_FMT_SBGGR8, 8},
> + {V4L2_PIX_FMT_SBGGR10P, 10},
> + {V4L2_PIX_FMT_SBGGR12, 12},
> + {V4L2_PIX_FMT_SBGGR16, 16},
> + {0, 0}
> +};
> +
> +const struct bayer_fmt all_bayer_rggb[] = {
> + {V4L2_PIX_FMT_SRGGB8, 8},
> + {V4L2_PIX_FMT_SRGGB10P, 10},
> + {V4L2_PIX_FMT_SRGGB12, 12},
> + /* V4L2_PIX_FMT_SRGGB16, 16},*/
Why is this commented out? Either uncomment, add a proper comment explaining why
or remove it.
> + {0, 0}
> +};
> +
> +const struct bayer_fmt all_bayer_gbrg[] = {
> + {V4L2_PIX_FMT_SGBRG8, 8},
> + {V4L2_PIX_FMT_SGBRG10P, 10},
> + {V4L2_PIX_FMT_SGBRG12, 12},
> + /* V4L2_PIX_FMT_SGBRG16, 16}, */
> + {0, 0}
> +};
> +
> +const struct bayer_fmt all_bayer_grbg[] = {
> + {V4L2_PIX_FMT_SGRBG8, 8},
> + {V4L2_PIX_FMT_SGRBG10P, 10},
> + {V4L2_PIX_FMT_SGRBG12, 12},
> + /* V4L2_PIX_FMT_SGRBG16, 16},*/
> + {0, 0}
> +};
> +
> +struct unicam_dmaqueue {
> + struct list_head active;
> +};
> +
> +struct unicam_buffer {
> + struct vb2_v4l2_buffer vb;
> + struct list_head list;
> +};
> +
> +struct unicam_cfg {
> + /* peripheral base address */
> + void __iomem *base;
> + /* clock gating base address */
> + void __iomem *clk_gate_base;
> + unsigned int irq;
> +
> + unsigned int periph_max_data_lanes;
> +};
> +
> +#define MAX_POSSIBLE_FMTS \
> + (ARRAY_SIZE(formats) + \
> + ARRAY_SIZE(all_bayer_bggr) + \
> + ARRAY_SIZE(all_bayer_rggb) + \
> + ARRAY_SIZE(all_bayer_grbg) + \
> + ARRAY_SIZE(all_bayer_gbrg))
> +
> +struct unicam_device {
> + /* V4l2 specific parameters */
> + /* Identifies video device for this channel */
> + struct video_device video_dev;
> + struct v4l2_ctrl_handler ctrl_handler;
> +
> + struct v4l2_fwnode_endpoint endpoint;
> +
> + struct v4l2_async_subdev asd;
> +
> + /* unicam cfg */
> + struct unicam_cfg cfg;
> + /* clock handle */
> + struct clk *clock;
> + /* V4l2 device */
> + struct v4l2_device v4l2_dev;
> + /* parent device */
> + struct platform_device *pdev;
> + /* subdevice async Notifier */
> + struct v4l2_async_notifier notifier;
> + unsigned int sequence;
> +
> + /* ptr to sub device */
> + struct v4l2_subdev *sensor;
> + /* Pad config for the sensor */
> + struct v4l2_subdev_pad_config *sensor_config;
> + /* current input at the sub device */
> + int current_input;
> +
> + /* Pointer pointing to current v4l2_buffer */
> + struct unicam_buffer *cur_frm;
> + /* Pointer pointing to next v4l2_buffer */
> + struct unicam_buffer *next_frm;
> +
> + /* video capture */
> + const struct unicam_fmt *fmt;
> + /* Used to store current pixel format */
> + struct v4l2_format v_fmt;
> + /* Used to store current mbus frame format */
> + struct v4l2_mbus_framefmt m_fmt;
> +
> + struct unicam_fmt active_fmts[MAX_POSSIBLE_FMTS];
> + int num_active_fmt;
> + unsigned int virtual_channel;
> + enum v4l2_mbus_type bus_type;
> + unsigned int max_data_lanes;
> + unsigned int active_data_lanes;
> +
> + struct v4l2_rect crop;
> +
> + /* Currently selected input on subdev */
> + int input;
> +
> + /* Buffer queue used in video-buf */
> + struct vb2_queue buffer_queue;
> + /* Queue of filled frames */
> + struct unicam_dmaqueue dma_queue;
> + /* IRQ lock for DMA queue */
> + spinlock_t dma_queue_lock;
> + /* lock used to access this structure */
> + struct mutex lock;
> + /* Flag to denote that we are processing buffers */
> + int streaming;
> +};
> +
> +/* Hardware access */
> +#define clk_write(dev, val) writel((val) | 0x5a000000, (dev)->clk_gate_base)
> +#define clk_read(dev) readl((dev)->clk_gate_base)
> +
> +#define reg_read(dev, offset) readl((dev)->base + (offset))
> +#define reg_write(dev, offset, val) writel(val, (dev)->base + (offset))
> +
> +#define reg_read_field(dev, offset, mask) get_field(reg_read((dev), (offset), \
> + mask))
> +
> +static inline int get_field(u32 value, u32 mask)
> +{
> + return (value & mask) >> __ffs(mask);
> +}
> +
> +static inline void set_field(u32 *valp, u32 field, u32 mask)
> +{
> + u32 val = *valp;
> +
> + val &= ~mask;
> + val |= (field << __ffs(mask)) & mask;
> + *valp = val;
> +}
> +
> +static inline void reg_write_field(struct unicam_cfg *dev, u32 offset,
> + u32 field, u32 mask)
> +{
> + u32 val = reg_read((dev), (offset));
> +
> + set_field(&val, field, mask);
> + reg_write((dev), (offset), val);
> +}
> +
> +/* Format setup functions */
> +
> +static int find_depth_by_code(u32 code)
> +{
> + const struct unicam_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k < ARRAY_SIZE(formats); k++) {
> + fmt = &formats[k];
> + if (fmt->code == code)
> + return fmt->depth;
> + }
> +
> + return 0;
> +}
> +
> +static inline int unicam_runtime_get(struct unicam_device *dev)
> +{
> + int r;
> +
> + r = pm_runtime_get_sync(&dev->pdev->dev);
> +
> + return r;
> +}
> +
> +static inline void unicam_runtime_put(struct unicam_device *dev)
> +{
> + pm_runtime_put_sync(&dev->pdev->dev);
> +}
> +
> +static const struct unicam_fmt *find_format_by_code(struct unicam_device *dev,
> + u32 code)
> +{
> + const struct unicam_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k < dev->num_active_fmt; k++) {
> + fmt = &dev->active_fmts[k];
> + if (fmt->code == code)
> + return fmt;
> + }
> +
> + return NULL;
> +}
> +
> +static const struct unicam_fmt *find_format_by_pix(struct unicam_device *dev,
> + u32 pixelformat)
> +{
> + const struct unicam_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k < dev->num_active_fmt; k++) {
> + fmt = &dev->active_fmts[k];
> + if (fmt->fourcc == pixelformat)
> + return fmt;
> + }
> +
> + return NULL;
> +}
> +
> +static char *fourcc_to_str(u32 fmt)
> +{
> + static char code[5];
> +
> + code[0] = (unsigned char)(fmt & 0xff);
> + code[1] = (unsigned char)((fmt >> 8) & 0xff);
> + code[2] = (unsigned char)((fmt >> 16) & 0xff);
> + code[3] = (unsigned char)((fmt >> 24) & 0xff);
> + code[4] = '\0';
> +
> + return code;
> +}
I understand that there can be two instances of this device, so using a static char is
wrong.
I think this function can be a useful addition to v4l2-common.c/h.
BTW, v4l2-ctl uses this function to convert a fourcc to a string:
std::string fcc2s(unsigned int val)
{
std::string s;
s += val & 0x7f;
s += (val >> 8) & 0x7f;
s += (val >> 16) & 0x7f;
s += (val >> 24) & 0x7f;
if (val & (1 << 31))
s += "-BE";
return s;
}
Bit 31 has special meaning.
Proposal for v4l2-common.h:
#define V4L2_FOURCC_MAX_SIZE 8
char *v4l2_fourcc2s(u32 fourcc, char *buf);
This function fills in buf and returns buf.
> +
> +static void dump_active_formats(struct unicam_device *dev)
> +{
> + int i;
> +
> + for (i = 0; i < dev->num_active_fmt; i++) {
> + unicam_dbg(3, dev, "active_fmt[%d] (%p) is code %04X, fourcc %s, depth %d\n",
> + i, &dev->active_fmts[i], dev->active_fmts[i].code,
> + fourcc_to_str(dev->active_fmts[i].fourcc),
> + dev->active_fmts[i].depth);
> + }
> +}
> +
> +static inline int bytes_per_line(u32 width, const struct unicam_fmt *fmt)
> +{
> + /* Stride must be a multiple of 16. */
> + return ALIGN((width * fmt->depth) >> 3, 16);
> +}
> +
> +static int __subdev_get_format(struct unicam_device *dev,
> + struct v4l2_mbus_framefmt *fmt)
> +{
> + struct v4l2_subdev_format sd_fmt = {0};
> + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
> + int ret;
> +
> + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> + sd_fmt.pad = 0;
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, get_fmt, dev->sensor_config,
> + &sd_fmt);
> + if (ret < 0)
> + return ret;
> +
> + *fmt = *mbus_fmt;
> +
> + unicam_dbg(1, dev, "%s %dx%d code:%04X\n", __func__,
> + fmt->width, fmt->height, fmt->code);
> +
> + return 0;
> +}
> +
> +static int __subdev_set_format(struct unicam_device *dev,
> + struct v4l2_mbus_framefmt *fmt)
> +{
> + struct v4l2_subdev_format sd_fmt;
> + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
> + int ret;
> +
> + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> + sd_fmt.pad = 0;
> + *mbus_fmt = *fmt;
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, dev->sensor_config,
> + &sd_fmt);
> + if (ret < 0)
> + return ret;
> +
> + unicam_dbg(1, dev, "%s %dx%d code:%04X\n", __func__,
> + fmt->width, fmt->height, fmt->code);
> +
> + return 0;
> +}
> +
> +static int unicam_calc_format_size(struct unicam_device *dev,
> + const struct unicam_fmt *fmt,
> + struct v4l2_format *f)
> +{
> + int min_bytesperline, min_sizeimage;
> +
> + if (!fmt) {
> + unicam_dbg(3, dev, "No unicam_fmt provided!\n");
> + return -EINVAL;
> + }
> +
> + v4l_bound_align_image(&f->fmt.pix.width, 16, MAX_WIDTH, 2,
> + &f->fmt.pix.height, 16, MAX_HEIGHT, 0, 0);
> +
> + min_bytesperline = bytes_per_line(f->fmt.pix.width, fmt);
> + if (f->fmt.pix.bytesperline > min_bytesperline)
> + f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.bytesperline, 16);
> + else
> + f->fmt.pix.bytesperline = min_bytesperline;
> +
> + min_sizeimage = f->fmt.pix.height *
> + f->fmt.pix.bytesperline;
> + if (f->fmt.pix.sizeimage < min_sizeimage)
> + f->fmt.pix.sizeimage = min_sizeimage;
As mentioned in the earlier discussion apps can't set this.
> +
> + unicam_dbg(1, dev, "width %d, fmt %s, depth %d\n",
> + f->fmt.pix.width, fourcc_to_str(f->fmt.pix.pixelformat),
> + fmt->depth);
> + unicam_dbg(3, dev, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
> + __func__, fourcc_to_str(f->fmt.pix.pixelformat),
> + f->fmt.pix.width, f->fmt.pix.height,
> + f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
> +
> + return 0;
> +}
> +
> +static void unicam_wr_dma_addr(struct unicam_device *dev, unsigned int dmaaddr)
> +{
> + unicam_dbg(1, dev, "wr_dma_addr %08X-%08X\n",
> + dmaaddr, dmaaddr + dev->v_fmt.fmt.pix.sizeimage);
> + reg_write(&dev->cfg, UNICAM_IBSA0, dmaaddr);
> + reg_write(&dev->cfg,
> + UNICAM_IBEA0,
> + dmaaddr + dev->v_fmt.fmt.pix.sizeimage);
> + reg_write(&dev->cfg, UNICAM_DBSA0, (uint32_t)dmaaddr);
> + reg_write(&dev->cfg, UNICAM_DBEA0, (uint32_t)dmaaddr + (16 << 10));
> +}
> +
> +static inline void unicam_schedule_next_buffer(struct unicam_device *dev)
> +{
> + struct unicam_dmaqueue *dma_q = &dev->dma_queue;
> + struct unicam_buffer *buf;
> + unsigned long addr;
> +
> + buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
> + dev->next_frm = buf;
> + list_del(&buf->list);
> +
> + addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
> + unicam_wr_dma_addr(dev, addr);
> +}
> +
> +static inline void unicam_process_buffer_complete(struct unicam_device *dev)
> +{
> + dev->cur_frm->vb.field = dev->m_fmt.field;
> + dev->cur_frm->vb.sequence = dev->sequence++;
> +
> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
> + dev->cur_frm = dev->next_frm;
> +}
> +
> +/*
> + * unicam_isr : ISR handler for unicam capture
> + * @irq: irq number
> + * @dev_id: dev_id ptr
> + *
> + * It changes status of the captured buffer, takes next buffer from the queue
> + * and sets its address in unicam registers
> + */
> +static irqreturn_t unicam_isr(int irq, void *dev)
> +{
> + struct unicam_device *unicam = (struct unicam_device *)dev;
> + int ista, sta;
> + struct unicam_cfg *cfg = &unicam->cfg;
> + struct unicam_dmaqueue *dma_q = &unicam->dma_queue;
> +
> + /*
> + * Don't service interrupts if not streaming.
> + * Avoids issues if the VPU should enable the
> + * peripheral without the kernel knowing (that
> + * shouldn't happen, but causes issues if it does).
> + */
> + if (!unicam->streaming)
> + return IRQ_HANDLED;
> +
> + sta = reg_read(cfg, UNICAM_STA);
> + /* Write value back to clear the interrupts */
> + reg_write(cfg, UNICAM_STA, sta);
> +
> + ista = reg_read(cfg, UNICAM_ISTA);
> + /* Write value back to clear the interrupts */
> + reg_write(cfg, UNICAM_ISTA, ista);
> +
> + if (!(sta && (UNICAM_IS | UNICAM_PI0)))
> + return IRQ_HANDLED;
> +
> + if (ista & UNICAM_FSI) {
> + /*
> + * Timestamp is to be when the first data byte was captured,
> + * aka frame start.
> + */
> + if (unicam->cur_frm)
> + unicam->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
> + }
> + if (ista & UNICAM_FEI || sta & UNICAM_PI0) {
> + /*
> + * Ensure we have swapped buffers already as we can't
> + * stop the peripheral. Overwrite the frame we've just
> + * captured instead.
> + */
> + if (unicam->cur_frm &&
> + unicam->cur_frm != unicam->next_frm)
> + unicam_process_buffer_complete(unicam);
> + }
> +
> + if (ista & (UNICAM_FSI | UNICAM_LCI)) {
> + spin_lock(&unicam->dma_queue_lock);
> + if (!list_empty(&dma_q->active) &&
> + unicam->cur_frm == unicam->next_frm)
> + unicam_schedule_next_buffer(unicam);
> + spin_unlock(&unicam->dma_queue_lock);
> + }
> +
> + if (reg_read(&unicam->cfg, UNICAM_ICTL) & UNICAM_FCM) {
> + /* Switch out of trigger mode if selected */
> + reg_write_field(&unicam->cfg, UNICAM_ICTL, 1, UNICAM_TFC);
> + reg_write_field(&unicam->cfg, UNICAM_ICTL, 0, UNICAM_FCM);
> + }
> + return IRQ_HANDLED;
> +}
> +
> +static int unicam_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> +
> + strlcpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver));
> + strlcpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card));
> +
> + snprintf(cap->bus_info, sizeof(cap->bus_info),
> + "platform:%s", dev->v4l2_dev.name);
> + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
> + V4L2_CAP_READWRITE;
> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
This has changed. Instead set the device_caps field in struct video_device.
The v4l2 core will then fill in these two fields for you based on the struct
video_device device_caps field.
> + return 0;
> +}
> +
> +static int unicam_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + const struct unicam_fmt *fmt = NULL;
> +
> + if (f->index >= dev->num_active_fmt)
> + return -EINVAL;
> +
> + fmt = &dev->active_fmts[f->index];
> +
> + f->pixelformat = fmt->fourcc;
> + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
No need to set type.
> + return 0;
> +}
> +
> +static int unicam_g_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> +
> + *f = dev->v_fmt;
> +
> + return 0;
> +}
> +
> +static int unicam_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + const struct unicam_fmt *fmt;
> + struct v4l2_subdev_format sd_fmt;
> + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
> + int ret;
> +
> + fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat);
> + if (!fmt) {
> + unicam_dbg(3, dev, "Fourcc format (0x%08x) not found.\n",
> + f->fmt.pix.pixelformat);
> +
> + /* Just get the first one enumerated */
> + fmt = &dev->active_fmts[0];
> + f->fmt.pix.pixelformat = fmt->fourcc;
> + }
> +
> + sd_fmt.which = V4L2_SUBDEV_FORMAT_TRY;
> + sd_fmt.pad = 0;
> +
> + v4l2_fill_mbus_format(mbus_fmt, &f->fmt.pix, fmt->code);
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, dev->sensor_config,
> + &sd_fmt);
> + if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
> + return ret;
> +
> + v4l2_fill_pix_format(&f->fmt.pix, &sd_fmt.format);
> +
> + /*
> + * Use current colorspace for now, it will get
> + * updated properly during s_fmt
> + */
> + f->fmt.pix.colorspace = dev->v_fmt.fmt.pix.colorspace;
> + return unicam_calc_format_size(dev, fmt, f);
> +}
> +
> +static int unicam_s_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + struct vb2_queue *q = &dev->buffer_queue;
> + const struct unicam_fmt *fmt;
> + struct v4l2_mbus_framefmt mbus_fmt = {0};
> + int ret;
> +
> + if (vb2_is_busy(q)) {
> + unicam_dbg(3, dev, "%s device busy\n", __func__);
debug message seems pointless since the error code indicates this already.
> + return -EBUSY;
> + }
> +
> + ret = unicam_try_fmt_vid_cap(file, priv, f);
> + if (ret < 0)
> + return ret;
> +
> + fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat);
> + dump_active_formats(dev);
> +
> + v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, fmt->code);
> +
> + ret = __subdev_set_format(dev, &mbus_fmt);
> + if (ret) {
> + unicam_dbg(3, dev,
> + "%s __subdev_set_format failed %d\n",
> + __func__, ret);
> + return ret;
> + }
> +
> + /* Just double check nothing has gone wrong */
> + if (mbus_fmt.code != fmt->code) {
> + unicam_dbg(3, dev,
> + "%s subdev changed format on us, this should not happen\n",
> + __func__);
> + return -EINVAL;
> + }
> +
> + v4l2_fill_pix_format(&dev->v_fmt.fmt.pix, &mbus_fmt);
> + dev->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + dev->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
> + dev->v_fmt.fmt.pix.bytesperline = f->fmt.pix.bytesperline;
> + dev->v_fmt.fmt.pix.sizeimage = f->fmt.pix.sizeimage;
> + unicam_calc_format_size(dev, fmt, &dev->v_fmt);
> +
> + unicam_dbg(3, dev,
> + "%s %dx%d, mbus_fmt %s, V4L2 pix %s. About to overwrite pix with %s\n",
> + __func__,
> + dev->v_fmt.fmt.pix.width,
> + dev->v_fmt.fmt.pix.height,
> + fourcc_to_str(mbus_fmt.code),
> + fourcc_to_str(dev->v_fmt.fmt.pix.pixelformat),
> + fourcc_to_str(fmt->fourcc));
> +
> + dev->fmt = fmt;
> + dev->m_fmt = mbus_fmt;
> + *f = dev->v_fmt;
> +
> + return 0;
> +}
> +
> +static int unicam_queue_setup(struct vb2_queue *vq,
> + unsigned int *nbuffers,
> + unsigned int *nplanes,
> + unsigned int sizes[],
> + struct device *alloc_devs[])
> +{
> + struct unicam_device *dev = vb2_get_drv_priv(vq);
> + unsigned int size = dev->v_fmt.fmt.pix.sizeimage;
> +
> + if (vq->num_buffers + *nbuffers < 3)
> + *nbuffers = 3 - vq->num_buffers;
> +
> + if (*nplanes) {
> + if (sizes[0] < size) {
> + unicam_err(dev, "sizes[0] %i < size %u\n",
> + sizes[0], size);
> + return -EINVAL;
> + }
> + size = sizes[0];
> + }
> +
> + *nplanes = 1;
> + sizes[0] = size;
> +
> + return 0;
> +}
> +
> +static int unicam_buffer_prepare(struct vb2_buffer *vb)
> +{
> + struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue);
> + struct unicam_buffer *buf = container_of(vb, struct unicam_buffer,
> + vb.vb2_buf);
> + unsigned long size;
> +
> + if (WARN_ON(!dev->fmt))
> + return -EINVAL;
> +
> + size = dev->v_fmt.fmt.pix.sizeimage;
> + if (vb2_plane_size(vb, 0) < size) {
> + unicam_err(dev, "data will not fit into plane (%lu < %lu)\n",
> + vb2_plane_size(vb, 0), size);
> + return -EINVAL;
> + }
> +
> + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
> + return 0;
> +}
> +
> +static void unicam_buffer_queue(struct vb2_buffer *vb)
> +{
> + struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue);
> + struct unicam_buffer *buf = container_of(vb, struct unicam_buffer,
> + vb.vb2_buf);
> + struct unicam_dmaqueue *dma_queue = &dev->dma_queue;
> + unsigned long flags = 0;
> +
> + /* recheck locking */
> + spin_lock_irqsave(&dev->dma_queue_lock, flags);
> + list_add_tail(&buf->list, &dma_queue->active);
> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
> +}
> +
> +static void unicam_wr_dma_config(struct unicam_device *dev,
> + unsigned int stride)
> +{
> + reg_write(&dev->cfg, UNICAM_IBLS, stride);
> +}
> +
> +static void unicam_set_packing_config(struct unicam_device *dev)
> +{
> + int pack, unpack;
> + u32 val;
> + int mbus_depth = find_depth_by_code(dev->fmt->code);
> + int v4l2_depth = dev->fmt->depth;
> +
> + if (mbus_depth == v4l2_depth) {
> + unpack = UNICAM_PUM_NONE;
> + pack = UNICAM_PPM_NONE;
> + } else {
> + switch (mbus_depth) {
> + case 8:
> + unpack = UNICAM_PUM_UNPACK8;
> + break;
> + case 10:
> + unpack = UNICAM_PUM_UNPACK10;
> + break;
> + case 12:
> + unpack = UNICAM_PUM_UNPACK12;
> + break;
> + case 14:
> + unpack = UNICAM_PUM_UNPACK14;
> + break;
> + case 16:
> + unpack = UNICAM_PUM_UNPACK16;
> + break;
> + default:
> + unpack = UNICAM_PUM_NONE;
> + break;
> + }
> + switch (v4l2_depth) {
> + case 8:
> + pack = UNICAM_PPM_PACK8;
> + break;
> + case 10:
> + pack = UNICAM_PPM_PACK10;
> + break;
> + case 12:
> + pack = UNICAM_PPM_PACK12;
> + break;
> + case 14:
> + pack = UNICAM_PPM_PACK14;
> + break;
> + case 16:
> + pack = UNICAM_PPM_PACK16;
> + break;
> + default:
> + pack = UNICAM_PPM_NONE;
> + break;
> + }
> + }
> +
> + val = 0;
> + set_field(&val, 2, UNICAM_DEBL_MASK);
> + set_field(&val, unpack, UNICAM_PUM_MASK);
> + set_field(&val, pack, UNICAM_PPM_MASK);
> + reg_write(&dev->cfg, UNICAM_IPIPE, val);
> +}
> +
> +static void unicam_cfg_image_id(struct unicam_device *dev)
> +{
> + struct unicam_cfg *cfg = &dev->cfg;
> +
> + if (dev->bus_type == V4L2_MBUS_CSI2) {
> + /* CSI2 mode */
> + reg_write(cfg, UNICAM_IDI0,
> + (dev->virtual_channel << 6) |
> + dev->fmt->csi_dt);
> + } else { /* CCP2 mode */
> + reg_write(cfg, UNICAM_IDI0,
> + (0x80 | dev->fmt->csi_dt));
> + }
> +}
> +
> +void unicam_start_rx(struct unicam_device *dev, unsigned long addr)
> +{
> + u32 val;
> + unsigned int i;
> + struct unicam_cfg *cfg = &dev->cfg;
> + int line_int_freq = dev->v_fmt.fmt.pix.height >> 2;
> +
> + if (line_int_freq < 128)
> + line_int_freq = 128;
> +
> + /* Enable lane clocks */
> + val = 1;
> + for (i = 0; i < dev->active_data_lanes; i++)
> + val = val << 2 | 1;
> + clk_write(cfg, val);
> +
> + /* Basic init */
> + reg_write(cfg, UNICAM_CTRL, UNICAM_MEM);
> +
> + /* Enable analogue control, and leave in reset. */
> + val = UNICAM_AR;
> + set_field(&val, 7, UNICAM_CTATADJ_MASK);
> + set_field(&val, 7, UNICAM_PTATADJ_MASK);
> + reg_write(cfg, UNICAM_ANA, val);
> + usleep_range(1000, 2000);
> +
> + /* Come out of reset */
> + reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_AR);
> +
> + /* Peripheral reset */
> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR);
> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR);
> +
> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE);
> +
> + /* Enable Rx control. */
> + val = reg_read(cfg, UNICAM_CTRL);
> + set_field(&val, UNICAM_CPM_CSI2, UNICAM_CPM_MASK);
> + set_field(&val, UNICAM_DCM_STROBE, UNICAM_DCM_MASK);
> + set_field(&val, 0xF, UNICAM_PFT_MASK);
> + set_field(&val, 128, UNICAM_OET_MASK);
> + reg_write(cfg, UNICAM_CTRL, val);
> +
> + reg_write(cfg, UNICAM_IHWIN, 0);
> + reg_write(cfg, UNICAM_IVWIN, 0);
> +
> + val = reg_read(&dev->cfg, UNICAM_PRI);
> + set_field(&val, 0, UNICAM_BL_MASK);
> + set_field(&val, 0, UNICAM_BS_MASK);
> + set_field(&val, 0xE, UNICAM_PP_MASK);
> + set_field(&val, 8, UNICAM_NP_MASK);
> + set_field(&val, 2, UNICAM_PT_MASK);
> + set_field(&val, 1, UNICAM_PE);
> + reg_write(cfg, UNICAM_PRI, val);
> +
> + reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_DDL);
> +
> + /* Always start in trigger frame capture mode (UNICAM_FCM set) */
> + val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM;
> + set_field(&val, line_int_freq, UNICAM_LCIE_MASK);
> + reg_write(cfg, UNICAM_ICTL, val);
> + reg_write(cfg, UNICAM_STA, UNICAM_STA_MASK_ALL);
> + reg_write(cfg, UNICAM_ISTA, UNICAM_ISTA_MASK_ALL);
> +
> + /* tclk_term_en */
> + reg_write_field(cfg, UNICAM_CLT, 2, UNICAM_CLT1_MASK);
> + /* tclk_settle */
> + reg_write_field(cfg, UNICAM_CLT, 6, UNICAM_CLT2_MASK);
> + /* td_term_en */
> + reg_write_field(cfg, UNICAM_DLT, 2, UNICAM_DLT1_MASK);
> + /* ths_settle */
> + reg_write_field(cfg, UNICAM_DLT, 6, UNICAM_DLT2_MASK);
> + /* trx_enable */
> + reg_write_field(cfg, UNICAM_DLT, 0, UNICAM_DLT3_MASK);
> +
> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_SOE);
> +
> + val = 0;
> + set_field(&val, 1, UNICAM_PCE);
> + set_field(&val, 1, UNICAM_GI);
> + set_field(&val, 1, UNICAM_CPH);
> + set_field(&val, 0, UNICAM_PCVC_MASK);
> + set_field(&val, 1, UNICAM_PCDT_MASK);
> + reg_write(cfg, UNICAM_CMP0, val);
> +
> + /* Enable clock lane */
> + val = 0;
> + set_field(&val, 1, UNICAM_CLE);
> + set_field(&val, 1, UNICAM_CLLPE);
> + reg_write(cfg, UNICAM_CLK, val);
> +
> + /* Enable required data lanes */
> + val = 0;
> + set_field(&val, 1, UNICAM_DLE);
> + set_field(&val, 1, UNICAM_DLLPE);
> + reg_write(cfg, UNICAM_DAT0, val);
> +
> + if (dev->active_data_lanes == 1)
> + val = 0;
> + reg_write(cfg, UNICAM_DAT1, val);
> +
> + if (dev->cfg.periph_max_data_lanes > 2) {
> + if (dev->active_data_lanes == 2)
> + val = 0;
> + reg_write(cfg, UNICAM_DAT2, val);
> +
> + if (dev->active_data_lanes == 3)
> + val = 0;
> + reg_write(cfg, UNICAM_DAT3, val);
> + }
> +
> + unicam_wr_dma_config(dev, dev->v_fmt.fmt.pix.bytesperline);
> + unicam_wr_dma_addr(dev, addr);
> + unicam_set_packing_config(dev);
> + unicam_cfg_image_id(dev);
> +
> + val = 0;
> + set_field(&val, 0, UNICAM_EDL_MASK);
> + reg_write(cfg, UNICAM_DCS, val);
> +
> + val = reg_read(cfg, UNICAM_MISC);
> + set_field(&val, 1, UNICAM_FL0);
> + set_field(&val, 1, UNICAM_FL1);
> + reg_write(cfg, UNICAM_MISC, val);
> +
> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPE);
> +
> + reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_LIP_MASK);
> +
> + reg_write_field(cfg, UNICAM_DCS, 1, UNICAM_LDP);
> +
> + /*
> + * Enable trigger only for the first frame to
> + * sync correctly to the FS from the source.
> + */
> + reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_TFC);
> +}
> +
> +static void unicam_disable(struct unicam_device *dev)
> +{
> + struct unicam_cfg *cfg = &dev->cfg;
> +
> + /* Analogue lane control disable */
> + reg_write_field(cfg, UNICAM_ANA, 1, UNICAM_DDL);
> +
> + /* Stop the output engine */
> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_SOE);
> +
> + /* Disable the data lanes. */
> + reg_write(cfg, UNICAM_DAT0, 0);
> + reg_write(cfg, UNICAM_DAT1, 0);
> +
> + if (dev->cfg.periph_max_data_lanes > 2) {
> + reg_write(cfg, UNICAM_DAT2, 0);
> + reg_write(cfg, UNICAM_DAT3, 0);
> + }
> +
> + /* Peripheral reset */
> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR);
> + usleep_range(50, 100);
> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR);
> +
> + /* Disable peripheral */
> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE);
> +
> + /* Disable all lane clocks */
> + clk_write(cfg, 0);
> +}
> +
> +static int unicam_start_streaming(struct vb2_queue *vq, unsigned int count)
> +{
> + struct unicam_device *dev = vb2_get_drv_priv(vq);
> + struct unicam_dmaqueue *dma_q = &dev->dma_queue;
> + struct unicam_buffer *buf, *tmp;
> + unsigned long addr = 0;
> + unsigned long flags;
> + int ret;
> +
> + spin_lock_irqsave(&dev->dma_queue_lock, flags);
> + if (list_empty(&dma_q->active)) {
> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
> + unicam_dbg(3, dev, "buffer queue is empty\n");
> + return -EIO;
This can't happen. This function will only be called if at least 2 buffers
have been queued (the value you set as min_buffers_needed).
> + }
> +
> + buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
> + dev->cur_frm = buf;
> + dev->next_frm = buf;
> + list_del(&buf->list);
> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
> +
> + addr = vb2_dma_contig_plane_dma_addr(&dev->cur_frm->vb.vb2_buf, 0);
> + dev->sequence = 0;
> +
> + ret = unicam_runtime_get(dev);
> + if (ret < 0) {
> + unicam_dbg(3, dev, "unicam_runtime_get failed\n");
> + goto err_release_buffers;
> + }
> +
> + dev->active_data_lanes = dev->max_data_lanes;
> + if (v4l2_subdev_has_op(dev->sensor, video, g_mbus_config)) {
> + struct v4l2_mbus_config mbus_config;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, g_mbus_config,
> + &mbus_config);
> + if (ret < 0) {
> + unicam_dbg(3, dev, "g_mbus_config failed\n");
> + goto err_pm_put;
> + }
> +
> + switch (mbus_config.flags & V4L2_MBUS_CSI2_LANES) {
> + case V4L2_MBUS_CSI2_1_LANE:
> + dev->active_data_lanes = 1;
> + break;
> + case V4L2_MBUS_CSI2_2_LANE:
> + dev->active_data_lanes = 2;
> + break;
> + case V4L2_MBUS_CSI2_3_LANE:
> + dev->active_data_lanes = 3;
> + break;
> + case V4L2_MBUS_CSI2_4_LANE:
> + dev->active_data_lanes = 4;
> + break;
> + default:
> + unicam_err(dev, "Invalid CSI2 lane flag value - %X\n",
> + mbus_config.flags & V4L2_MBUS_CSI2_LANES);
> + break;
> + }
> + }
> + if (dev->active_data_lanes > dev->cfg.periph_max_data_lanes) {
> + unicam_err(dev, "Device has requested %u data lanes, which is >%u supported by peripheral",
> + dev->active_data_lanes,
> + dev->cfg.periph_max_data_lanes);
> + ret = -EINVAL;
> + goto err_pm_put;
> + }
> +
> + unicam_dbg(1, dev, "Running with %u data lanes\n",
> + dev->active_data_lanes);
> +
> + ret = clk_set_rate(dev->clock, 100 * 1000 * 1000);
> + if (ret) {
> + unicam_err(dev, "failed to set up clock\n");
> + goto err_pm_put;
> + }
> +
> + ret = clk_prepare_enable(dev->clock);
> + if (ret) {
> + unicam_err(dev, "Failed to enable CSI clock: %d\n", ret);
> + goto err_pm_put;
> + }
> + ret = v4l2_subdev_call(dev->sensor, core, s_power, 1);
> + if (ret < 0 && ret != -ENOIOCTLCMD) {
> + unicam_err(dev, "power on failed in subdev\n");
> + goto err_clock_unprepare;
> + }
> + dev->streaming = 1;
> +
> + unicam_start_rx(dev, addr);
> +
> + ret = v4l2_subdev_call(dev->sensor, video, s_stream, 1);
> + if (ret < 0) {
> + unicam_err(dev, "stream on failed in subdev\n");
> + goto err_disable_unicam;
> + }
> +
> + return 0;
> +
> +err_disable_unicam:
> + unicam_disable(dev);
> + v4l2_subdev_call(dev->sensor, core, s_power, 0);
> +err_clock_unprepare:
> + clk_disable_unprepare(dev->clock);
> +err_pm_put:
> + unicam_runtime_put(dev);
> +err_release_buffers:
> + list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
> + list_del(&buf->list);
> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
> + }
> + if (dev->cur_frm != dev->next_frm)
> + vb2_buffer_done(&dev->next_frm->vb.vb2_buf,
> + VB2_BUF_STATE_QUEUED);
> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
> + dev->next_frm = NULL;
> + dev->cur_frm = NULL;
> +
> + return ret;
> +}
> +
> +static void unicam_stop_streaming(struct vb2_queue *vq)
> +{
> + struct unicam_device *dev = vb2_get_drv_priv(vq);
> + struct unicam_dmaqueue *dma_q = &dev->dma_queue;
> + struct unicam_buffer *buf, *tmp;
> + unsigned long flags;
> +
> + if (v4l2_subdev_call(dev->sensor, video, s_stream, 0) < 0)
> + unicam_err(dev, "stream off failed in subdev\n");
> +
> + unicam_disable(dev);
> +
> + /* Release all active buffers */
> + spin_lock_irqsave(&dev->dma_queue_lock, flags);
> + list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
> + list_del(&buf->list);
> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> + }
> +
> + if (dev->cur_frm == dev->next_frm) {
> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> + } else {
> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> + vb2_buffer_done(&dev->next_frm->vb.vb2_buf,
> + VB2_BUF_STATE_ERROR);
> + }
> + dev->cur_frm = NULL;
> + dev->next_frm = NULL;
> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
> +
> + if (v4l2_subdev_has_op(dev->sensor, core, s_power)) {
> + if (v4l2_subdev_call(dev->sensor, core, s_power, 0) < 0)
> + unicam_err(dev, "power off failed in subdev\n");
> + }
> +
> + clk_disable_unprepare(dev->clock);
> + unicam_runtime_put(dev);
> +}
> +
> +static int unicam_enum_input(struct file *file, void *priv,
> + struct v4l2_input *inp)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> +
> + if (inp->index != 0)
> + return -EINVAL;
> +
> + inp->type = V4L2_INPUT_TYPE_CAMERA;
> + if (v4l2_subdev_has_op(dev->sensor, pad, dv_timings_cap)) {
Use s_dv_timings instead of dv_timings_cap.
> + inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
> + inp->std = 0;
> + } else if (v4l2_subdev_has_op(dev->sensor, video, querystd)) {
Use s_std instead of querystd. FYI: querystd is not always implemented.
> + inp->capabilities = V4L2_IN_CAP_STD;
> + inp->std = V4L2_STD_ALL;
This needs to come from the g_tvnorms op.
> + } else {
> + inp->capabilities = 0;
> + inp->std = 0;
> + }
> + sprintf(inp->name, "Camera 0");
> + return 0;
> +}
> +
> +static int unicam_g_input(struct file *file, void *priv, unsigned int *i)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + *i = dev->input;
> + return 0;
> +}
> +
> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i, 0, 0);
> + else
> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
Drop this if-else entirely. s_routing makes really no sense when using a device
tree. In this particular case there really is just one input, period.
> +
> + /* Must always be able to set input to 0 */
> + if (!i)
> + ret = 0;
> + if (!ret)
> + dev->input = i;
> +
> + return ret;
> +}
> +
> +static int unicam_querystd(struct file *file, void *priv,
> + v4l2_std_id *std)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, querystd, std);
> + return ret;
No need for the local ret variable.
> +}
> +
> +static int unicam_g_std(struct file *file, void *priv, v4l2_std_id *std)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, g_std, std);
> + return ret;
> +}
> +
> +static int unicam_s_std(struct file *file, void *priv, v4l2_std_id std)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, s_std, std);
> + return ret;
> +}
> +
> +static int unicam_s_edid(struct file *file, void *priv, struct v4l2_edid *edid)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, set_edid, edid);
> +
> + return ret;
> +}
> +
> +static int unicam_g_edid(struct file *file, void *priv, struct v4l2_edid *edid)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, get_edid, edid);
> +
> + return ret;
> +}
> +
> +static int unicam_g_dv_timings(struct file *file, void *priv,
> + struct v4l2_dv_timings *timings)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, g_dv_timings, timings);
> +
> + return ret;
> +}
> +
> +static int unicam_s_dv_timings(struct file *file, void *priv,
> + struct v4l2_dv_timings *timings)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, s_dv_timings, timings);
> + if (ret)
> + return ret;
> +
> + return ret;
> +}
> +
> +static int unicam_query_dv_timings(struct file *file, void *priv,
> + struct v4l2_dv_timings *timings)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, video, query_dv_timings, timings);
> +
> + return ret;
> +}
> +
> +static int unicam_enum_dv_timings(struct file *file, void *priv,
> + struct v4l2_enum_dv_timings *timings)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, enum_dv_timings, timings);
> +
> + return ret;
> +}
> +
> +static int unicam_dv_timings_cap(struct file *file, void *priv,
> + struct v4l2_dv_timings_cap *cap)
> +{
> + struct unicam_device *dev = video_drvdata(file);
> + int ret;
> +
> + ret = v4l2_subdev_call(dev->sensor, pad, dv_timings_cap, cap);
> +
> + return ret;
> +}
> +
> +static int unicam_subscribe_event(struct v4l2_fh *fh,
> + const struct v4l2_event_subscription *sub)
> +{
> + switch (sub->type) {
> + case V4L2_EVENT_SOURCE_CHANGE:
> + return v4l2_event_subscribe(fh, sub, 4, NULL);
> + }
> +
> + return v4l2_ctrl_subscribe_event(fh, sub);
> +}
> +
> +static void unicam_notify(struct v4l2_subdev *sd,
> + unsigned int notification, void *arg)
> +{
> + struct unicam_device *dev =
> + container_of(sd->v4l2_dev, struct unicam_device, v4l2_dev);
> +
> + switch (notification) {
> + case V4L2_DEVICE_NOTIFY_EVENT:
> + v4l2_event_queue(&dev->video_dev, arg);
> + break;
> + default:
> + break;
> + }
> +}
> +
> +static const struct vb2_ops unicam_video_qops = {
> + .wait_prepare = vb2_ops_wait_prepare,
> + .wait_finish = vb2_ops_wait_finish,
> + .queue_setup = unicam_queue_setup,
> + .buf_prepare = unicam_buffer_prepare,
> + .buf_queue = unicam_buffer_queue,
> + .start_streaming = unicam_start_streaming,
> + .stop_streaming = unicam_stop_streaming,
> +};
> +
> +/* unicam capture driver file operations */
> +static const struct v4l2_file_operations unicam_fops = {
> + .owner = THIS_MODULE,
> + .open = v4l2_fh_open,
> + .release = vb2_fop_release,
> + .read = vb2_fop_read,
> + .poll = vb2_fop_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = vb2_fop_mmap,
> +};
> +
> +/* unicam capture ioctl operations */
> +static const struct v4l2_ioctl_ops unicam_ioctl_ops = {
> + .vidioc_querycap = unicam_querycap,
> + .vidioc_enum_fmt_vid_cap = unicam_enum_fmt_vid_cap,
> + .vidioc_g_fmt_vid_cap = unicam_g_fmt_vid_cap,
> + .vidioc_s_fmt_vid_cap = unicam_s_fmt_vid_cap,
> + .vidioc_try_fmt_vid_cap = unicam_try_fmt_vid_cap,
> +
> + .vidioc_enum_input = unicam_enum_input,
> + .vidioc_g_input = unicam_g_input,
> + .vidioc_s_input = unicam_s_input,
> +
> + .vidioc_querystd = unicam_querystd,
> + .vidioc_s_std = unicam_s_std,
> + .vidioc_g_std = unicam_g_std,
> +
> + .vidioc_g_edid = unicam_g_edid,
> + .vidioc_s_edid = unicam_s_edid,
> +
> + .vidioc_s_dv_timings = unicam_s_dv_timings,
> + .vidioc_g_dv_timings = unicam_g_dv_timings,
> + .vidioc_query_dv_timings = unicam_query_dv_timings,
> + .vidioc_enum_dv_timings = unicam_enum_dv_timings,
> + .vidioc_dv_timings_cap = unicam_dv_timings_cap,
> +
> + .vidioc_reqbufs = vb2_ioctl_reqbufs,
> + .vidioc_create_bufs = vb2_ioctl_create_bufs,
> + .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
> + .vidioc_querybuf = vb2_ioctl_querybuf,
> + .vidioc_qbuf = vb2_ioctl_qbuf,
> + .vidioc_dqbuf = vb2_ioctl_dqbuf,
> + .vidioc_expbuf = vb2_ioctl_expbuf,
> + .vidioc_streamon = vb2_ioctl_streamon,
> + .vidioc_streamoff = vb2_ioctl_streamoff,
> +
> + .vidioc_log_status = v4l2_ctrl_log_status,
> + .vidioc_subscribe_event = unicam_subscribe_event,
> + .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
> +};
> +
> +static int
> +unicam_async_bound(struct v4l2_async_notifier *notifier,
> + struct v4l2_subdev *subdev,
> + struct v4l2_async_subdev *asd)
> +{
> + struct unicam_device *unicam = container_of(notifier->v4l2_dev,
> + struct unicam_device, v4l2_dev);
> + struct v4l2_subdev_mbus_code_enum mbus_code;
> + int j;
> + struct unicam_fmt *active_fmt;
> + int ret = 0;
> +
> + unicam_dbg(1, unicam, "unicam_async_bound\n");
> +
> + if (unicam->sensor) {
> + unicam_info(unicam, "Rejecting subdev %s (Already set!!)",
> + subdev->name);
> + return 0;
> + }
> +
> + unicam->sensor = subdev;
> + unicam_dbg(1, unicam, "Using sensor %s for capture\n", subdev->name);
> +
> + /* Enumerate sub device formats and enable all matching local formats */
> + unicam->num_active_fmt = 0;
> + active_fmt = &unicam->active_fmts[0];
> + unicam_dbg(2, unicam, "Get supported formats...\n");
> + for (j = 0; ret != -EINVAL && ret != -ENOIOCTLCMD; ++j) {
> + const struct unicam_fmt *fmt = NULL;
> + int k;
> +
> + memset(&mbus_code, 0, sizeof(mbus_code));
> + mbus_code.index = j;
> + ret = v4l2_subdev_call(subdev, pad, enum_mbus_code,
> + NULL, &mbus_code);
> + if (ret < 0) {
> + unicam_dbg(2, unicam,
> + "subdev->enum_mbus_code idx %d returned %d - continue\n",
> + j, ret);
> + continue;
> + }
> +
> + unicam_dbg(2, unicam,
> + "subdev %s: code: %04x idx: %d\n",
> + subdev->name, mbus_code.code, j);
> +
> + for (k = 0; k < ARRAY_SIZE(formats); k++) {
> + if (mbus_code.code == formats[k].code) {
> + fmt = &formats[k];
> + break;
> + }
> + }
> + unicam_dbg(2, unicam, "fmt %04x returned as %p, V4L2 FOURCC %04x, csi_dt %02X\n",
> + mbus_code.code, fmt, fmt ? fmt->fourcc : 0,
> + fmt ? fmt->csi_dt : 0);
> + if (fmt) {
> + const struct bayer_fmt *fmt_list = NULL;
> +
> + switch (fmt->fourcc) {
> + case PIX_FMT_ALL_BGGR:
> + fmt_list = all_bayer_bggr;
> + break;
> + case PIX_FMT_ALL_RGGB:
> + fmt_list = all_bayer_rggb;
> + break;
> + case PIX_FMT_ALL_GBRG:
> + fmt_list = all_bayer_gbrg;
> + break;
> + case PIX_FMT_ALL_GRBG:
> + fmt_list = all_bayer_grbg;
> + break;
> + }
> + if (fmt_list) {
> + for (k = 0; fmt_list[k].fourcc; k++) {
> + *active_fmt = *fmt;
> + active_fmt->fourcc = fmt_list[k].fourcc;
> + active_fmt->depth = fmt_list[k].depth;
> + unicam_dbg(2, unicam,
> + "matched fourcc: %s: code: %04x idx: %d\n",
> + fourcc_to_str(fmt->fourcc),
> + fmt->code,
> + unicam->num_active_fmt);
> + unicam->num_active_fmt++;
> + active_fmt++;
> + }
> + } else {
> + *active_fmt = *fmt;
> + unicam_dbg(2, unicam,
> + "matched fourcc: %s: code: %04x idx: %d\n",
> + fourcc_to_str(fmt->fourcc),
> + fmt->code,
> + unicam->num_active_fmt);
> + unicam->num_active_fmt++;
> + active_fmt++;
> + }
> + }
> + }
> + unicam_dbg(2, unicam,
> + "Done all formats\n");
> + dump_active_formats(unicam);
> +
> + return 0;
> +}
> +
> +static int unicam_probe_complete(struct unicam_device *unicam)
> +{
> + struct video_device *vdev;
> + struct vb2_queue *q;
> + const struct unicam_fmt *fmt;
> + struct v4l2_mbus_framefmt mbus_fmt;
> + int ret;
> +
> + v4l2_set_subdev_hostdata(unicam->sensor, unicam);
> +
> + unicam->v4l2_dev.notify = unicam_notify;
> +
> + unicam->sensor_config = v4l2_subdev_alloc_pad_config(unicam->sensor);
> + if (!unicam->sensor_config)
> + return -ENOMEM;
> +
> + ret = __subdev_get_format(unicam, &mbus_fmt);
> + if (ret) {
> + unicam_err(unicam, "Failed to get_format - ret %d\n", ret);
> + return ret;
> + }
> +
> + fmt = find_format_by_code(unicam, mbus_fmt.code);
> + if (!fmt) {
> + unicam_dbg(3, unicam, "mbus code format (0x%08x) not found.\n",
> + mbus_fmt.code);
> + return -EINVAL;
> + }
> +
> + /* Save current subdev format */
> + v4l2_fill_pix_format(&unicam->v_fmt.fmt.pix, &mbus_fmt);
> + unicam->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + unicam->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
> + unicam->v_fmt.fmt.pix.bytesperline = 0;
> + unicam_calc_format_size(unicam, fmt, &unicam->v_fmt);
> + unicam->fmt = fmt;
> + unicam->m_fmt = mbus_fmt;
> +
> + if (v4l2_subdev_has_op(unicam->sensor, video, querystd)) {
Check against s_std
> + if (v4l2_subdev_has_op(unicam->sensor, video, g_tvnorms)) {
> + v4l2_std_id tvnorms;
> +
> + ret = v4l2_subdev_call(unicam->sensor, video,
> + g_tvnorms, &tvnorms);
> + if (ret) {
> + unicam_dbg(1, unicam, "Sensor supports g_tvnorms, but returned error\n");
> + unicam->video_dev.tvnorms |= V4L2_STD_ALL;
I recommend a WARN_ON and an error return. This really should not happen.
If it does, then it is a subdev bug.
> + } else {
> + unicam->video_dev.tvnorms |= tvnorms;
> + }
> + } else {
> + unicam->video_dev.tvnorms |= V4L2_STD_ALL;
Same here.
> + }
> + }
Based on the subdev capabilities (sensor, STD, DV_TIMINGS) you should disable ioctls
by calling v4l2_disable_ioctl. See e.g. drivers/media/platform/vivid/vivid-core.c.
> +
> + spin_lock_init(&unicam->dma_queue_lock);
> + mutex_init(&unicam->lock);
> +
> + /* Add controls from the subdevice */
> + ret = v4l2_ctrl_add_handler(&unicam->ctrl_handler,
> + unicam->sensor->ctrl_handler, NULL);
> + if (ret < 0)
> + return ret;
> +
> + q = &unicam->buffer_queue;
> + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
> + q->drv_priv = unicam;
> + q->ops = &unicam_video_qops;
> + q->mem_ops = &vb2_dma_contig_memops;
> + q->buf_struct_size = sizeof(struct unicam_buffer);
> + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> + q->lock = &unicam->lock;
> + q->min_buffers_needed = 2;
> + q->dev = &unicam->pdev->dev;
> +
> + ret = vb2_queue_init(q);
> + if (ret) {
> + unicam_err(unicam, "vb2_queue_init() failed\n");
> + return ret;
> + }
> +
> + INIT_LIST_HEAD(&unicam->dma_queue.active);
> +
> + vdev = &unicam->video_dev;
> + strlcpy(vdev->name, UNICAM_MODULE_NAME, sizeof(vdev->name));
> + vdev->release = video_device_release_empty;
> + vdev->fops = &unicam_fops;
> + vdev->ioctl_ops = &unicam_ioctl_ops;
> + vdev->v4l2_dev = &unicam->v4l2_dev;
> + vdev->vfl_dir = VFL_DIR_RX;
> + vdev->queue = q;
> + vdev->lock = &unicam->lock;
> + vdev->dev_debug = 0xff;
Drop this line. Shouldn't be set by drivers.
But you should set vdev->device_caps here.
> + video_set_drvdata(vdev, unicam);
> + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
> + if (ret) {
> + unicam_err(unicam,
> + "Unable to register video device.\n");
> + return ret;
> + }
> +
> + ret = v4l2_device_register_subdev_nodes(&unicam->v4l2_dev);
> + if (ret) {
> + unicam_err(unicam,
> + "Unable to register subdev nodes.\n");
> + video_unregister_device(&unicam->video_dev);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int unicam_async_complete(struct v4l2_async_notifier *notifier)
> +{
> + struct unicam_device *unicam = container_of(notifier->v4l2_dev,
> + struct unicam_device, v4l2_dev);
> +
> + return unicam_probe_complete(unicam);
> +}
> +
> +static struct device_node *
> +of_get_port(const struct device_node *parent)
> +{
> + struct device_node *port = NULL;
> +
> + if (!parent)
> + return NULL;
> +
> + port = of_get_child_by_name(parent, "port");
> +
> + return port;
> +}
> +
> +static struct device_node *
> +of_get_next_endpoint(const struct device_node *parent,
> + struct device_node *prev)
> +{
> + struct device_node *ep = NULL;
> +
> + if (!parent)
> + return NULL;
> +
> + do {
> + ep = of_get_next_child(parent, prev);
> + if (!ep)
> + return NULL;
> + prev = ep;
> + } while (of_node_cmp(ep->name, "endpoint") != 0);
> +
> + return ep;
> +}
> +
> +static int of_unicam_connect_subdevs(struct unicam_device *dev)
> +{
> + struct platform_device *pdev = dev->pdev;
> + struct device_node *parent, *ep_node = NULL, *port = NULL,
> + *remote_ep = NULL, *sensor_node = NULL;
> + struct v4l2_fwnode_endpoint *endpoint;
> + struct v4l2_async_subdev *asd;
> + int ret = -EINVAL;
> + unsigned int lane;
> + struct v4l2_async_subdev **subdevs = NULL;
> +
> + parent = pdev->dev.of_node;
> +
> + asd = &dev->asd;
> + endpoint = &dev->endpoint;
> +
> + dev->cfg.periph_max_data_lanes = DEFAULT_MAX_DATA_LANES;
> + of_property_read_u32(parent, "max_data_lanes",
> + &dev->cfg.periph_max_data_lanes);
> +
> + unicam_dbg(3, dev, "Scanning Port node for csi2 port\n");
> + port = of_get_port(parent);
> + if (!port) {
> + unicam_dbg(1, dev, "No port node found for csi2 port\n");
> + goto cleanup_exit;
> + }
> +
> + if (!port) {
> + unicam_dbg(1, dev, "No port node matches csi2 port\n");
> + goto cleanup_exit;
> + }
> +
> + unicam_dbg(3, dev, "Scanning sub-device for csi2 port\n");
> +
> + ep_node = of_get_next_endpoint(port, ep_node);
> + if (!ep_node) {
> + unicam_dbg(3, dev, "can't get next endpoint\n");
> + goto cleanup_exit;
> + }
> +
> + unicam_dbg(3, dev, "ep_node is %s\n",
> + ep_node->name);
> +
> + sensor_node = of_graph_get_remote_port_parent(ep_node);
> + if (!sensor_node) {
> + unicam_dbg(3, dev, "can't get remote parent\n");
> + goto cleanup_exit;
> + }
> + unicam_dbg(3, dev, "sensor_node is %s\n",
> + sensor_node->name);
> + asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
> + asd->match.fwnode.fwnode = of_fwnode_handle(sensor_node);
> +
> + remote_ep = of_parse_phandle(ep_node, "remote-endpoint", 0);
> + if (!remote_ep) {
> + unicam_dbg(3, dev, "can't get remote-endpoint\n");
> + goto cleanup_exit;
> + }
> + unicam_dbg(3, dev, "remote_ep is %s\n",
> + remote_ep->name);
> + v4l2_fwnode_endpoint_parse(of_fwnode_handle(remote_ep), endpoint);
> + unicam_dbg(3, dev, "parsed remote_ep to endpoint. nr_of_link_frequencies %u, bus_type %u\n",
> + endpoint->nr_of_link_frequencies, endpoint->bus_type);
> +
> + if (endpoint->bus_type != V4L2_MBUS_CSI2) {
> + /* We can support CCP2 too, but no enum defined for that. */
> + unicam_err(dev, "sub-device %s is not a CSI2 device %d\n",
> + sensor_node->name, endpoint->bus_type);
> + goto cleanup_exit;
> + }
> +
> + /* Store bus type - CSI2 vs CCP2 */
> + dev->bus_type = endpoint->bus_type;
> + unicam_dbg(3, dev, "bus_type is %d\n", dev->bus_type);
> +
> + /* Store Virtual Channel number */
> + dev->virtual_channel = endpoint->base.id;
> +
> + /* Store number of data lanes */
> + dev->max_data_lanes = endpoint->bus.mipi_csi2.num_data_lanes;
> +
> + if (dev->max_data_lanes > dev->cfg.periph_max_data_lanes) {
> + /* We can support CCP2 too, but no enum defined for that. */
> + unicam_err(dev, "Subdevice %s wants too many data lanes (%u > %u)\n",
> + sensor_node->name, dev->max_data_lanes,
> + dev->cfg.periph_max_data_lanes);
> + goto cleanup_exit;
> + }
> + for (lane = 0; lane < dev->max_data_lanes; lane++) {
> + if (endpoint->bus.mipi_csi2.data_lanes[lane] != lane + 1) {
> + unicam_err(dev, "Subdevice %s - incompatible data lane config\n",
> + sensor_node->name);
> + goto cleanup_exit;
> + }
> + }
> +
> + unicam_dbg(3, dev, "v4l2-endpoint: CSI2\n");
> + unicam_dbg(3, dev, "Virtual Channel=%d\n", dev->virtual_channel);
> + unicam_dbg(3, dev, "flags=0x%08x\n", endpoint->bus.mipi_csi2.flags);
> + unicam_dbg(3, dev, "clock_lane=%d\n",
> + endpoint->bus.mipi_csi2.clock_lane);
> + unicam_dbg(3, dev, "num_data_lanes=%d\n",
> + endpoint->bus.mipi_csi2.num_data_lanes);
> + unicam_dbg(3, dev, "data_lanes= <\n");
> + for (lane = 0; lane < endpoint->bus.mipi_csi2.num_data_lanes; lane++)
> + unicam_dbg(3, dev, "\t%u\n",
> + endpoint->bus.mipi_csi2.data_lanes[lane]);
> + unicam_dbg(3, dev, "\t>\n");
> +
> + unicam_dbg(1, dev, "found sub-device %s\n",
> + sensor_node->name);
> +
> + subdevs = devm_kzalloc(&dev->pdev->dev, sizeof(*subdevs), GFP_KERNEL);
> + if (!subdevs) {
> + ret = -ENOMEM;
> + goto cleanup_exit;
> + }
> + subdevs[0] = asd;
> + dev->notifier.subdevs = subdevs;
> + dev->notifier.num_subdevs = 1;
> + dev->notifier.bound = unicam_async_bound;
> + dev->notifier.complete = unicam_async_complete;
> + ret = v4l2_async_notifier_register(&dev->v4l2_dev,
> + &dev->notifier);
> + if (ret) {
> + unicam_err(dev, "Error registering async notifier - ret %d\n",
> + ret);
> + ret = -EINVAL;
> + }
> +
> +cleanup_exit:
> + if (remote_ep)
> + of_node_put(remote_ep);
> + if (sensor_node)
> + of_node_put(sensor_node);
> + if (ep_node)
> + of_node_put(ep_node);
> + if (port)
> + of_node_put(port);
> +
> + return ret;
> +}
> +
> +/*
> + * unicam_probe : This function creates device entries by register
> + * itself to the V4L2 driver and initializes fields of each
> + * device objects
> + */
> +static int unicam_probe(struct platform_device *pdev)
> +{
> + struct unicam_cfg *unicam_cfg;
> + struct unicam_device *unicam;
> + struct v4l2_ctrl_handler *hdl;
> + struct resource *res;
> + int ret;
> +
> + unicam = devm_kzalloc(&pdev->dev, sizeof(*unicam), GFP_KERNEL);
> + if (!unicam)
> + return -ENOMEM;
> +
> + unicam->pdev = pdev;
> + unicam_cfg = &unicam->cfg;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + unicam_cfg->base = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(unicam_cfg->base)) {
> + unicam_err(unicam, "Failed to get main io block\n");
> + return PTR_ERR(unicam_cfg->base);
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> + unicam_cfg->clk_gate_base = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(unicam_cfg->clk_gate_base)) {
> + unicam_err(unicam, "Failed to get 2nd io block\n");
> + return PTR_ERR(unicam_cfg->clk_gate_base);
> + }
> +
> + unicam->clock = devm_clk_get(&pdev->dev, "lp_clock");
> + if (IS_ERR(unicam->clock)) {
> + unicam_err(unicam, "Failed to get clock\n");
> + return PTR_ERR(unicam->clock);
> + }
> +
> + ret = platform_get_irq(pdev, 0);
> + if (ret <= 0) {
> + dev_err(&pdev->dev, "No IRQ resource\n");
> + return -ENODEV;
> + }
> + unicam_cfg->irq = ret;
> +
> + ret = devm_request_irq(&pdev->dev, unicam_cfg->irq, unicam_isr, 0,
> + "unicam_capture0", unicam);
> + if (ret) {
> + dev_err(&pdev->dev, "Unable to request interrupt\n");
> + return -EINVAL;
> + }
> +
> + ret = v4l2_device_register(&pdev->dev, &unicam->v4l2_dev);
> + if (ret) {
> + unicam_err(unicam,
> + "Unable to register v4l2 device.\n");
> + return ret;
> + }
> +
> + /* Reserve space for the controls */
> + /*
> + * Currently the subdev with the largest number of controls (13) is
> + * ov6550. So let's pick 16 as a hint for the control handler. Note
> + * that this is a hint only: too large and you waste some memory, too
> + * small and there is a (very) small performance hit when looking up
> + * controls in the internal hash.
> + */
> + hdl = &unicam->ctrl_handler;
> + ret = v4l2_ctrl_handler_init(hdl, 16);
> + if (ret < 0)
> + goto probe_out_v4l2_unregister;
> + unicam->v4l2_dev.ctrl_handler = hdl;
> +
> + /* set the driver data in platform device */
> + platform_set_drvdata(pdev, unicam);
> +
> + ret = of_unicam_connect_subdevs(unicam);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to connect subdevs\n");
> + goto free_hdl;
> + }
> +
> + /* Enabling module functional clock */
> + pm_runtime_enable(&pdev->dev);
> +
> + return 0;
> +
> +free_hdl:
> + v4l2_ctrl_handler_free(hdl);
> +probe_out_v4l2_unregister:
> + v4l2_device_unregister(&unicam->v4l2_dev);
> + return ret;
> +}
> +
> +/*
> + * unicam_remove : It un-register device from V4L2 driver
> + */
> +static int unicam_remove(struct platform_device *pdev)
> +{
> + struct unicam_device *unicam = platform_get_drvdata(pdev);
> +
> + unicam_dbg(2, unicam, "%s\n", __func__);
> +
> + pm_runtime_disable(&pdev->dev);
> +
> + v4l2_async_notifier_unregister(&unicam->notifier);
> + v4l2_ctrl_handler_free(&unicam->ctrl_handler);
> + v4l2_device_unregister(&unicam->v4l2_dev);
> + video_unregister_device(&unicam->video_dev);
> + if (unicam->sensor_config)
> + v4l2_subdev_free_pad_config(unicam->sensor_config);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id unicam_of_match[] = {
> + { .compatible = "brcm,bcm2835-unicam", },
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, unicam_of_match);
> +
> +static struct platform_driver unicam_driver = {
> + .probe = unicam_probe,
> + .remove = unicam_remove,
> + .driver = {
> + .name = UNICAM_MODULE_NAME,
> + .of_match_table = of_match_ptr(unicam_of_match),
> + },
> +};
> +
> +module_platform_driver(unicam_driver);
> +
> +MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.org>");
> +MODULE_DESCRIPTION("BCM2835 Unicam driver");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION(UNICAM_VERSION);
> diff --git a/drivers/media/platform/bcm2835/vc4-regs-unicam.h b/drivers/media/platform/bcm2835/vc4-regs-unicam.h
> new file mode 100644
> index 0000000..793e42a
> --- /dev/null
> +++ b/drivers/media/platform/bcm2835/vc4-regs-unicam.h
> @@ -0,0 +1,257 @@
> +/*
> + * Copyright (C) 2017 Raspberry Pi Trading.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + */
> +
> +#ifndef VC4_REGS_UNICAM_H
> +#define VC4_REGS_UNICAM_H
> +
> +/* The following values are taken from files found within the code drop
> + * made by Broadcom for the BCM21553 Graphics Driver.
> + */
> +
> +/*
> + * Modified from brcm_usrlib/dag/vmcsx/vcinclude/hardware_vc4.h to
> + * just have the offset, and use the BIT and GENMASK kernel macros.
> + */
> +
> +#define UNICAM_CTRL 0x000
> +#define UNICAM_STA 0x004
> +#define UNICAM_ANA 0x008
> +#define UNICAM_PRI 0x00c
> +#define UNICAM_CLK 0x010
> +#define UNICAM_CLT 0x014
> +#define UNICAM_DAT0 0x018
> +#define UNICAM_DAT1 0x01c
> +#define UNICAM_DAT2 0x020
> +#define UNICAM_DAT3 0x024
> +#define UNICAM_DLT 0x028
> +#define UNICAM_CMP0 0x02c
> +#define UNICAM_CMP1 0x030
> +#define UNICAM_CAP0 0x034
> +#define UNICAM_CAP1 0x038
> +#define UNICAM_ICTL 0x100
> +#define UNICAM_ISTA 0x104
> +#define UNICAM_IDI0 0x108
> +#define UNICAM_IPIPE 0x10c
> +#define UNICAM_IBSA0 0x110
> +#define UNICAM_IBEA0 0x114
> +#define UNICAM_IBLS 0x118
> +#define UNICAM_IBWP 0x11c
> +#define UNICAM_IHWIN 0x120
> +#define UNICAM_IHSTA 0x124
> +#define UNICAM_IVWIN 0x128
> +#define UNICAM_IVSTA 0x12c
> +#define UNICAM_ICC 0x130
> +#define UNICAM_ICS 0x134
> +#define UNICAM_IDC 0x138
> +#define UNICAM_IDPO 0x13c
> +#define UNICAM_IDCA 0x140
> +#define UNICAM_IDCD 0x144
> +#define UNICAM_IDS 0x148
> +#define UNICAM_DCS 0x200
> +#define UNICAM_DBSA0 0x204
> +#define UNICAM_DBEA0 0x208
> +#define UNICAM_DBWP 0x20c
> +#define UNICAM_DBCTL 0x300
> +#define UNICAM_IBSA1 0x304
> +#define UNICAM_IBEA1 0x308
> +#define UNICAM_IDI1 0x30c
> +#define UNICAM_DBSA1 0x310
> +#define UNICAM_DBEA1 0x314
> +#define UNICAM_MISC 0x400
> +
> +/* The following bitmasks are from Broadcom datasheets */
> +/* UNICAM_CTRL Register */
> +#define UNICAM_CPE BIT(0)
> +#define UNICAM_MEM BIT(1)
> +#define UNICAM_CPR BIT(2)
> +#define UNICAM_CPM_MASK GENMASK(3, 3)
> +#define UNICAM_CPM_CSI2 0
> +#define UNICAM_CPM_CCP2 1
> +#define UNICAM_SOE BIT(4)
> +#define UNICAM_DCM_MASK GENMASK(5, 5)
> +#define UNICAM_DCM_STROBE 0
> +#define UNICAM_DCM_DATA 1
> +#define UNICAM_SLS BIT(6)
> +#define UNICAM_PFT_MASK GENMASK(11, 8)
> +#define UNICAM_OET_MASK GENMASK(20, 12)
> +
> +/* UNICAM_STA Register */
> +#define UNICAM_SYN BIT(0)
> +#define UNICAM_CS BIT(1)
> +#define UNICAM_SBE BIT(2)
> +#define UNICAM_PBE BIT(3)
> +#define UNICAM_HOE BIT(4)
> +#define UNICAM_PLE BIT(5)
> +#define UNICAM_SSC BIT(6)
> +#define UNICAM_CRCE BIT(7)
> +#define UNICAM_OES BIT(8)
> +#define UNICAM_IFO BIT(9)
> +#define UNICAM_OFO BIT(10)
> +#define UNICAM_BFO BIT(11)
> +#define UNICAM_DL BIT(12)
> +#define UNICAM_PS BIT(13)
> +#define UNICAM_IS BIT(14)
> +#define UNICAM_PI0 BIT(15)
> +#define UNICAM_PI1 BIT(16)
> +#define UNICAM_FSI_S BIT(17)
> +#define UNICAM_FEI_S BIT(18)
> +#define UNICAM_LCI_S BIT(19)
> +#define UNICAM_BUF0_RDY BIT(20)
> +#define UNICAM_BUF0_NO BIT(21)
> +#define UNICAM_BUF1_RDY BIT(22)
> +#define UNICAM_BUF1_NO BIT(23)
> +#define UNICAM_DI BIT(24)
> +
> +#define UNICAM_STA_MASK_ALL \
> + (UNICAM_DL + \
> + UNICAM_SBE + \
> + UNICAM_PBE + \
> + UNICAM_HOE + \
> + UNICAM_PLE + \
> + UNICAM_SSC + \
> + UNICAM_CRCE + \
> + UNICAM_IFO + \
> + UNICAM_OFO + \
> + UNICAM_PS + \
> + UNICAM_PI0 + \
> + UNICAM_PI1)
> +
> +/* UNICAM_ANA Register */
> +#define UNICAM_APD BIT(0)
> +#define UNICAM_BPD BIT(1)
> +#define UNICAM_AR BIT(2)
> +#define UNICAM_DDL BIT(3)
> +#define UNICAM_CTATADJ_MASK GENMASK(7, 4)
> +#define UNICAM_PTATADJ_MASK GENMASK(11, 8)
> +
> +/* UNICAM_PRI Register */
> +#define UNICAM_PE BIT(0)
> +#define UNICAM_PT_MASK GENMASK(2, 1)
> +#define UNICAM_NP_MASK GENMASK(7, 4)
> +#define UNICAM_PP_MASK GENMASK(11, 8)
> +#define UNICAM_BS_MASK GENMASK(15, 12)
> +#define UNICAM_BL_MASK GENMASK(17, 16)
> +
> +/* UNICAM_CLK Register */
> +#define UNICAM_CLE BIT(0)
> +#define UNICAM_CLPD BIT(1)
> +#define UNICAM_CLLPE BIT(2)
> +#define UNICAM_CLHSE BIT(3)
> +#define UNICAM_CLTRE BIT(4)
> +#define UNICAM_CLAC_MASK GENMASK(8, 5)
> +#define UNICAM_CLSTE BIT(29)
> +
> +/* UNICAM_CLT Register */
> +#define UNICAM_CLT1_MASK GENMASK(7, 0)
> +#define UNICAM_CLT2_MASK GENMASK(15, 8)
> +
> +/* UNICAM_DATn Registers */
> +#define UNICAM_DLE BIT(0)
> +#define UNICAM_DLPD BIT(1)
> +#define UNICAM_DLLPE BIT(2)
> +#define UNICAM_DLHSE BIT(3)
> +#define UNICAM_DLTRE BIT(4)
> +#define UNICAM_DLSM BIT(5)
> +#define UNICAM_DLFO BIT(28)
> +#define UNICAM_DLSTE BIT(29)
> +
> +#define UNICAM_DAT_MASK_ALL (UNICAM_DLSTE + UNICAM_DLFO)
> +
> +/* UNICAM_DLT Register */
> +#define UNICAM_DLT1_MASK GENMASK(7, 0)
> +#define UNICAM_DLT2_MASK GENMASK(15, 8)
> +#define UNICAM_DLT3_MASK GENMASK(23, 16)
> +
> +/* UNICAM_ICTL Register */
> +#define UNICAM_FSIE BIT(0)
> +#define UNICAM_FEIE BIT(1)
> +#define UNICAM_IBOB BIT(2)
> +#define UNICAM_FCM BIT(3)
> +#define UNICAM_TFC BIT(4)
> +#define UNICAM_LIP_MASK GENMASK(6, 5)
> +#define UNICAM_LCIE_MASK GENMASK(28, 16)
> +
> +/* UNICAM_IDI0/1 Register */
> +#define UNICAM_ID0_MASK GENMASK(7, 0)
> +#define UNICAM_ID1_MASK GENMASK(15, 8)
> +#define UNICAM_ID2_MASK GENMASK(23, 16)
> +#define UNICAM_ID3_MASK GENMASK(31, 24)
> +
> +/* UNICAM_ISTA Register */
> +#define UNICAM_FSI BIT(0)
> +#define UNICAM_FEI BIT(1)
> +#define UNICAM_LCI BIT(2)
> +
> +#define UNICAM_ISTA_MASK_ALL (UNICAM_FSI + UNICAM_FEI + UNICAM_LCI)
> +
> +/* UNICAM_IPIPE Register */
> +#define UNICAM_PUM_MASK GENMASK(2, 0)
> + /* Unpacking modes */
> + #define UNICAM_PUM_NONE 0
> + #define UNICAM_PUM_UNPACK6 1
> + #define UNICAM_PUM_UNPACK7 2
> + #define UNICAM_PUM_UNPACK8 3
> + #define UNICAM_PUM_UNPACK10 4
> + #define UNICAM_PUM_UNPACK12 5
> + #define UNICAM_PUM_UNPACK14 6
> + #define UNICAM_PUM_UNPACK16 7
> +#define UNICAM_DDM_MASK GENMASK(6, 3)
> +#define UNICAM_PPM_MASK GENMASK(9, 7)
> + /* Packing modes */
> + #define UNICAM_PPM_NONE 0
> + #define UNICAM_PPM_PACK8 1
> + #define UNICAM_PPM_PACK10 2
> + #define UNICAM_PPM_PACK12 3
> + #define UNICAM_PPM_PACK14 4
> + #define UNICAM_PPM_PACK16 5
> +#define UNICAM_DEM_MASK GENMASK(11, 10)
> +#define UNICAM_DEBL_MASK GENMASK(14, 12)
> +#define UNICAM_ICM_MASK GENMASK(16, 15)
> +#define UNICAM_IDM_MASK GENMASK(17, 17)
> +
> +/* UNICAM_ICC Register */
> +#define UNICAM_ICFL_MASK GENMASK(4, 0)
> +#define UNICAM_ICFH_MASK GENMASK(9, 5)
> +#define UNICAM_ICST_MASK GENMASK(12, 10)
> +#define UNICAM_ICLT_MASK GENMASK(15, 13)
> +#define UNICAM_ICLL_MASK GENMASK(31, 16)
> +
> +/* UNICAM_DCS Register */
> +#define UNICAM_DIE BIT(0)
> +#define UNICAM_DIM BIT(1)
> +#define UNICAM_DBOB BIT(3)
> +#define UNICAM_FDE BIT(4)
> +#define UNICAM_LDP BIT(5)
> +#define UNICAM_EDL_MASK GENMASK(15, 8)
> +
> +/* UNICAM_DBCTL Register */
> +#define UNICAM_DBEN BIT(0)
> +#define UNICAM_BUF0_IE BIT(1)
> +#define UNICAM_BUF1_IE BIT(2)
> +
> +/* UNICAM_CMP[0,1] register */
> +#define UNICAM_PCE BIT(31)
> +#define UNICAM_GI BIT(9)
> +#define UNICAM_CPH BIT(8)
> +#define UNICAM_PCVC_MASK GENMASK(7, 6)
> +#define UNICAM_PCDT_MASK GENMASK(5, 0)
> +
> +/* UNICAM_MISC register */
> +#define UNICAM_FL0 BIT(6)
> +#define UNICAM_FL1 BIT(9)
> +
> +#endif
>
Overall this looks pretty good!
Regards,
Hans
Am 15.06.2017 um 09:12 schrieb Hans Verkuil:
> Hi Dave,
>
> Here is a quick review of this driver. Once a v2 is posted I'll do a
> more thorough
> check.
>
> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>> Add driver for the Unicam camera receiver block on
>> BCM283x processors.
>>
>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>> ---
>> drivers/media/platform/Kconfig | 1 +
>> drivers/media/platform/Makefile | 2 +
>> drivers/media/platform/bcm2835/Kconfig | 14 +
>> drivers/media/platform/bcm2835/Makefile | 3 +
>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>> ++++++++++++++++++++++
>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>> 6 files changed, 2377 insertions(+)
>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>
>> diff --git a/drivers/media/platform/Kconfig
>> b/drivers/media/platform/Kconfig
>> index 8da521a..1111aa9 100644
>> --- a/drivers/media/platform/Kconfig
>> +++ b/drivers/media/platform/Kconfig
>> @@ -135,6 +135,7 @@ source "drivers/media/platform/am437x/Kconfig"
>> source "drivers/media/platform/xilinx/Kconfig"
>> source "drivers/media/platform/rcar-vin/Kconfig"
>> source "drivers/media/platform/atmel/Kconfig"
>> +source "drivers/media/platform/bcm2835/Kconfig"
>> config VIDEO_TI_CAL
>> tristate "TI CAL (Camera Adaptation Layer) driver"
>> diff --git a/drivers/media/platform/Makefile
>> b/drivers/media/platform/Makefile
>> index 6bbdf94..9c5e412 100644
>> --- a/drivers/media/platform/Makefile
>> +++ b/drivers/media/platform/Makefile
>> @@ -81,3 +81,5 @@ obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec/
>> obj-$(CONFIG_VIDEO_MEDIATEK_MDP) += mtk-mdp/
>> obj-$(CONFIG_VIDEO_MEDIATEK_JPEG) += mtk-jpeg/
>> +
>> +obj-y += bcm2835/
>> diff --git a/drivers/media/platform/bcm2835/Kconfig
>> b/drivers/media/platform/bcm2835/Kconfig
>> new file mode 100644
>> index 0000000..9f9be9e
>> --- /dev/null
>> +++ b/drivers/media/platform/bcm2835/Kconfig
>> @@ -0,0 +1,14 @@
>> +# Broadcom VideoCore4 V4L2 camera support
>> +
>> +config VIDEO_BCM2835_UNICAM
>> + tristate "Broadcom BCM2835 Unicam video capture driver"
>> + depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
>> + depends on ARCH_BCM2708 || ARCH_BCM2709 || ARCH_BCM2835 ||
>> COMPILE_TEST
>
ARCH_BCM2708 and ARCH_BCM2709 isn't available upstream and should be
dropped.
Hi Hans.
"On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
> Hi Dave,
>
> Here is a quick review of this driver. Once a v2 is posted I'll do a more
> thorough
> check.
Thank you. I wasn't expecting such a quick response.
> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>
>> Add driver for the Unicam camera receiver block on
>> BCM283x processors.
>>
>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>> ---
>> drivers/media/platform/Kconfig | 1 +
>> drivers/media/platform/Makefile | 2 +
>> drivers/media/platform/bcm2835/Kconfig | 14 +
>> drivers/media/platform/bcm2835/Makefile | 3 +
>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>> ++++++++++++++++++++++
>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>> 6 files changed, 2377 insertions(+)
>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>
>> diff --git a/drivers/media/platform/Kconfig
>> b/drivers/media/platform/Kconfig
>> index 8da521a..1111aa9 100644
>> --- a/drivers/media/platform/Kconfig
>> +++ b/drivers/media/platform/Kconfig
>> @@ -135,6 +135,7 @@ source "drivers/media/platform/am437x/Kconfig"
>> source "drivers/media/platform/xilinx/Kconfig"
>> source "drivers/media/platform/rcar-vin/Kconfig"
>> source "drivers/media/platform/atmel/Kconfig"
>> +source "drivers/media/platform/bcm2835/Kconfig"
>> config VIDEO_TI_CAL
>> tristate "TI CAL (Camera Adaptation Layer) driver"
>> diff --git a/drivers/media/platform/Makefile
>> b/drivers/media/platform/Makefile
>> index 6bbdf94..9c5e412 100644
>> --- a/drivers/media/platform/Makefile
>> +++ b/drivers/media/platform/Makefile
>> @@ -81,3 +81,5 @@ obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec/
>> obj-$(CONFIG_VIDEO_MEDIATEK_MDP) += mtk-mdp/
>> obj-$(CONFIG_VIDEO_MEDIATEK_JPEG) += mtk-jpeg/
>> +
>> +obj-y += bcm2835/
>> diff --git a/drivers/media/platform/bcm2835/Kconfig
>> b/drivers/media/platform/bcm2835/Kconfig
>> new file mode 100644
>> index 0000000..9f9be9e
>> --- /dev/null
>> +++ b/drivers/media/platform/bcm2835/Kconfig
>> @@ -0,0 +1,14 @@
>> +# Broadcom VideoCore4 V4L2 camera support
>> +
>> +config VIDEO_BCM2835_UNICAM
>> + tristate "Broadcom BCM2835 Unicam video capture driver"
>> + depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
>> + depends on ARCH_BCM2708 || ARCH_BCM2709 || ARCH_BCM2835 ||
>> COMPILE_TEST
>
>
> So this block is available on other broadcom SoCs as well? Not just the
> 2835?
> Should the description of this Kconfig be adapted?
As Stefan has noted, BCM2708 and BCM2709 are only in the downstream
tree and will be removed.
Techincally this block is also present in a few other Broadcom SoCs
that use VideoCore4 (eg BCM28155), however 283x is the only chip
family that I can support.
There are Broadcom folk supporting 281xx, so I will cc them when I
come to adding an entry in MAINTAINERS (I've already communicated with
Eric, and he was happy to defer this driver off to me. Exact details
to be agreed).
>> + select VIDEOBUF2_DMA_CONTIG
>> + select V4L2_FWNODE
>> + ---help---
>> + Say Y here to enable V4L2 subdevice for CSI2 receiver.
>> + This is a V4L2 subdevice that interfaces directly to the VC4
>> peripheral.
>> +
>> + To compile this driver as a module, choose M here. The module
>> + will be called bcm2835-unicam.
>> diff --git a/drivers/media/platform/bcm2835/Makefile
>> b/drivers/media/platform/bcm2835/Makefile
>> new file mode 100644
>> index 0000000..a98aba0
>> --- /dev/null
>> +++ b/drivers/media/platform/bcm2835/Makefile
>> @@ -0,0 +1,3 @@
>> +# Makefile for BCM2835 Unicam driver
>> +
>> +obj-$(CONFIG_VIDEO_BCM2835_UNICAM) += bcm2835-unicam.o
>> diff --git a/drivers/media/platform/bcm2835/bcm2835-unicam.c
>> b/drivers/media/platform/bcm2835/bcm2835-unicam.c
>> new file mode 100644
>> index 0000000..26039da
>> --- /dev/null
>> +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
>> @@ -0,0 +1,2100 @@
>> +/*
>> + * BCM2835 Unicam capture Driver
>> + *
>> + * Copyright (C) 2017 - Raspberry Pi (Trading) Ltd.
>> + *
>> + * Dave Stevenson <dave.stevenson@raspberrypi.org>
>> + *
>> + * Based on TI am437x driver by Benoit Parrot and Lad, Prabhakar and
>> + * TI CAL camera interface driver by Benoit Parrot.
>> + *
>> + * This program is free software; you may redistribute it and/or modify
>> + * it under the terms of the GNU General Public License as published by
>> + * the Free Software Foundation; version 2 of the License.
>> + *
>> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
>> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
>> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
>> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
>> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
>> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
>> + * SOFTWARE.
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/device.h>
>> +#include <linux/err.h>
>> +#include <linux/init.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/io.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_graph.h>
>> +#include <linux/pinctrl/consumer.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/pm_runtime.h>
>> +#include <linux/slab.h>
>> +#include <linux/uaccess.h>
>> +#include <linux/videodev2.h>
>> +
>> +#include <media/v4l2-common.h>
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-dev.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-event.h>
>> +#include <media/v4l2-ioctl.h>
>> +#include <media/v4l2-fwnode.h>
>> +#include <media/videobuf2-v4l2.h>
>> +#include <media/videobuf2-dma-contig.h>
>> +
>> +#include "vc4-regs-unicam.h"
>> +
>> +#define UNICAM_MODULE_NAME "unicam"
>> +#define UNICAM_VERSION "0.1.0"
>> +
>> +static int debug;
>> +module_param(debug, int, 0644);
>> +MODULE_PARM_DESC(debug, "Debug level 0-3");
>> +
>> +#define unicam_dbg(level, dev, fmt, arg...) \
>> + v4l2_dbg(level, debug, &(dev)->v4l2_dev, fmt, ##arg)
>> +#define unicam_info(dev, fmt, arg...) \
>> + v4l2_info(&(dev)->v4l2_dev, fmt, ##arg)
>> +#define unicam_err(dev, fmt, arg...) \
>> + v4l2_err(&(dev)->v4l2_dev, fmt, ##arg)
>> +
>> +/*
>> + * Stride is a 16 bit register. Max width is therefore determined by
>> + * that divided by the number of bits per pixel. Take 32bpp as a
>> + * worst case.
>> + * No imposed limit on the height, so adopt a square image for want
>> + * of anything better.
>> + */
>> +#define MAX_WIDTH ((65536 / 4) - 1)
>> +#define MAX_HEIGHT MAX_WIDTH
>> +
>> +#define DEFAULT_MAX_DATA_LANES 2
>> +
>> +/*
>> + * struct unicam_fmt - Unicam media bus format information
>> + * @pixelformat: V4L2 pixel format FCC identifier.
>> + * @code: V4L2 media bus format code.
>> + * @depth: Bits per pixel (when stored in memory).
>> + * @csi_dt: CSI data type.
>> + */
>> +struct unicam_fmt {
>> + u32 fourcc;
>> + u32 code;
>> + u8 depth;
>> + u8 csi_dt;
>> +};
>> +
>> +/*
>> + * The peripheral can unpack and repack between several of
>> + * the Bayer raw formats, so any Bayer format can be advertised
>> + * as the same Bayer order in each of the supported bit depths.
>> + * Use lower case to avoid clashing with V4L2_PIX_FMT_SGBRG8
>> + * formats.
>> + */
>> +#define PIX_FMT_ALL_BGGR v4l2_fourcc('b', 'g', 'g', 'r')
>> +#define PIX_FMT_ALL_RGGB v4l2_fourcc('r', 'g', 'g', 'b')
>> +#define PIX_FMT_ALL_GBRG v4l2_fourcc('g', 'b', 'r', 'g')
>> +#define PIX_FMT_ALL_GRBG v4l2_fourcc('g', 'r', 'b', 'g')
>> +
>> +static const struct unicam_fmt formats[] = {
>> + /* YUV Formats */
>> + {
>> + .fourcc = V4L2_PIX_FMT_YUYV,
>> + .code = MEDIA_BUS_FMT_YUYV8_2X8,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_UYVY,
>> + .code = MEDIA_BUS_FMT_UYVY8_2X8,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_YVYU,
>> + .code = MEDIA_BUS_FMT_YVYU8_2X8,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_VYUY,
>> + .code = MEDIA_BUS_FMT_VYUY8_2X8,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_YUYV,
>> + .code = MEDIA_BUS_FMT_YUYV8_1X16,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_UYVY,
>> + .code = MEDIA_BUS_FMT_UYVY8_1X16,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_YVYU,
>> + .code = MEDIA_BUS_FMT_YVYU8_1X16,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_VYUY,
>> + .code = MEDIA_BUS_FMT_VYUY8_1X16,
>> + .depth = 16,
>> + .csi_dt = 0x1e,
>> + }, {
>> + /* RGB Formats */
>> + .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb
>> rrrrrggg */
>> + .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
>> + .depth = 16,
>> + .csi_dt = 0x22,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg
>> gggbbbbb */
>> + .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
>> + .depth = 16,
>> + .csi_dt = 0x22
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb
>> arrrrrgg */
>> + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
>> + .depth = 16,
>> + .csi_dt = 0x21,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg
>> gggbbbbb */
>> + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
>> + .depth = 16,
>> + .csi_dt = 0x21,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */
>> + .code = MEDIA_BUS_FMT_RGB888_1X24,
>> + .depth = 24,
>> + .csi_dt = 0x24,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */
>> + .code = MEDIA_BUS_FMT_BGR888_1X24,
>> + .depth = 24,
>> + .csi_dt = 0x24,
>> + }, {
>> + .fourcc = V4L2_PIX_FMT_RGB32, /* argb */
>> + .code = MEDIA_BUS_FMT_ARGB8888_1X32,
>> + .depth = 32,
>> + .csi_dt = 0x0,
>> + }, {
>> + /* Bayer Formats */
>> + .fourcc = PIX_FMT_ALL_BGGR,
>> + .code = MEDIA_BUS_FMT_SBGGR8_1X8,
>> + .depth = 8,
>> + .csi_dt = 0x2a,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GBRG,
>> + .code = MEDIA_BUS_FMT_SGBRG8_1X8,
>> + .depth = 8,
>> + .csi_dt = 0x2a,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GRBG,
>> + .code = MEDIA_BUS_FMT_SGRBG8_1X8,
>> + .depth = 8,
>> + .csi_dt = 0x2a,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_RGGB,
>> + .code = MEDIA_BUS_FMT_SRGGB8_1X8,
>> + .depth = 8,
>> + .csi_dt = 0x2a,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_BGGR,
>> + .code = MEDIA_BUS_FMT_SBGGR10_1X10,
>> + .depth = 10,
>> + .csi_dt = 0x2b,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GBRG,
>> + .code = MEDIA_BUS_FMT_SGBRG10_1X10,
>> + .depth = 10,
>> + .csi_dt = 0x2b,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GRBG,
>> + .code = MEDIA_BUS_FMT_SGRBG10_1X10,
>> + .depth = 10,
>> + .csi_dt = 0x2b,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_RGGB,
>> + .code = MEDIA_BUS_FMT_SRGGB10_1X10,
>> + .depth = 10,
>> + .csi_dt = 0x2b,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_BGGR,
>> + .code = MEDIA_BUS_FMT_SBGGR12_1X12,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GBRG,
>> + .code = MEDIA_BUS_FMT_SGBRG12_1X12,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GRBG,
>> + .code = MEDIA_BUS_FMT_SGRBG12_1X12,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_RGGB,
>> + .code = MEDIA_BUS_FMT_SRGGB12_1X12,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_RGGB,
>> + .code = MEDIA_BUS_FMT_SRGGB16_1X16,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GBRG,
>> + .code = MEDIA_BUS_FMT_SGBRG16_1X16,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GBRG,
>> + .code = MEDIA_BUS_FMT_SGRBG16_1X16,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + }, {
>> + .fourcc = PIX_FMT_ALL_GRBG,
>> + .code = MEDIA_BUS_FMT_SGRBG16_1X16,
>> + .depth = 12,
>> + .csi_dt = 0x2c,
>> + },
>> +};
>> +
>> +struct bayer_fmt {
>> + u32 fourcc;
>> + u8 depth;
>> +};
>> +
>> +const struct bayer_fmt all_bayer_bggr[] = {
>> + {V4L2_PIX_FMT_SBGGR8, 8},
>> + {V4L2_PIX_FMT_SBGGR10P, 10},
>> + {V4L2_PIX_FMT_SBGGR12, 12},
>> + {V4L2_PIX_FMT_SBGGR16, 16},
>> + {0, 0}
>> +};
>> +
>> +const struct bayer_fmt all_bayer_rggb[] = {
>> + {V4L2_PIX_FMT_SRGGB8, 8},
>> + {V4L2_PIX_FMT_SRGGB10P, 10},
>> + {V4L2_PIX_FMT_SRGGB12, 12},
>> + /* V4L2_PIX_FMT_SRGGB16, 16},*/
>
>
> Why is this commented out? Either uncomment, add a proper comment explaining
> why
> or remove it.
I was developing this against the Pi specific tree, and that is still
on 4.9 which didn't have several of the 16 bit Bayer formats. I see
that Sakari has added them (thank you Sakari), so I can uncomment
them.
>> + {0, 0}
>> +};
>> +
>> +const struct bayer_fmt all_bayer_gbrg[] = {
>> + {V4L2_PIX_FMT_SGBRG8, 8},
>> + {V4L2_PIX_FMT_SGBRG10P, 10},
>> + {V4L2_PIX_FMT_SGBRG12, 12},
>> + /* V4L2_PIX_FMT_SGBRG16, 16}, */
>> + {0, 0}
>> +};
>> +
>> +const struct bayer_fmt all_bayer_grbg[] = {
>> + {V4L2_PIX_FMT_SGRBG8, 8},
>> + {V4L2_PIX_FMT_SGRBG10P, 10},
>> + {V4L2_PIX_FMT_SGRBG12, 12},
>> + /* V4L2_PIX_FMT_SGRBG16, 16},*/
>> + {0, 0}
>> +};
>> +
>> +struct unicam_dmaqueue {
>> + struct list_head active;
>> +};
>> +
>> +struct unicam_buffer {
>> + struct vb2_v4l2_buffer vb;
>> + struct list_head list;
>> +};
>> +
>> +struct unicam_cfg {
>> + /* peripheral base address */
>> + void __iomem *base;
>> + /* clock gating base address */
>> + void __iomem *clk_gate_base;
>> + unsigned int irq;
>> +
>> + unsigned int periph_max_data_lanes;
>> +};
>> +
>> +#define MAX_POSSIBLE_FMTS \
>> + (ARRAY_SIZE(formats) + \
>> + ARRAY_SIZE(all_bayer_bggr) + \
>> + ARRAY_SIZE(all_bayer_rggb) + \
>> + ARRAY_SIZE(all_bayer_grbg) + \
>> + ARRAY_SIZE(all_bayer_gbrg))
>> +
>> +struct unicam_device {
>> + /* V4l2 specific parameters */
>> + /* Identifies video device for this channel */
>> + struct video_device video_dev;
>> + struct v4l2_ctrl_handler ctrl_handler;
>> +
>> + struct v4l2_fwnode_endpoint endpoint;
>> +
>> + struct v4l2_async_subdev asd;
>> +
>> + /* unicam cfg */
>> + struct unicam_cfg cfg;
>> + /* clock handle */
>> + struct clk *clock;
>> + /* V4l2 device */
>> + struct v4l2_device v4l2_dev;
>> + /* parent device */
>> + struct platform_device *pdev;
>> + /* subdevice async Notifier */
>> + struct v4l2_async_notifier notifier;
>> + unsigned int sequence;
>> +
>> + /* ptr to sub device */
>> + struct v4l2_subdev *sensor;
>> + /* Pad config for the sensor */
>> + struct v4l2_subdev_pad_config *sensor_config;
>> + /* current input at the sub device */
>> + int current_input;
>> +
>> + /* Pointer pointing to current v4l2_buffer */
>> + struct unicam_buffer *cur_frm;
>> + /* Pointer pointing to next v4l2_buffer */
>> + struct unicam_buffer *next_frm;
>> +
>> + /* video capture */
>> + const struct unicam_fmt *fmt;
>> + /* Used to store current pixel format */
>> + struct v4l2_format v_fmt;
>> + /* Used to store current mbus frame format */
>> + struct v4l2_mbus_framefmt m_fmt;
>> +
>> + struct unicam_fmt active_fmts[MAX_POSSIBLE_FMTS];
>> + int num_active_fmt;
>> + unsigned int virtual_channel;
>> + enum v4l2_mbus_type bus_type;
>> + unsigned int max_data_lanes;
>> + unsigned int active_data_lanes;
>> +
>> + struct v4l2_rect crop;
>> +
>> + /* Currently selected input on subdev */
>> + int input;
>> +
>> + /* Buffer queue used in video-buf */
>> + struct vb2_queue buffer_queue;
>> + /* Queue of filled frames */
>> + struct unicam_dmaqueue dma_queue;
>> + /* IRQ lock for DMA queue */
>> + spinlock_t dma_queue_lock;
>> + /* lock used to access this structure */
>> + struct mutex lock;
>> + /* Flag to denote that we are processing buffers */
>> + int streaming;
>> +};
>> +
>> +/* Hardware access */
>> +#define clk_write(dev, val) writel((val) | 0x5a000000,
>> (dev)->clk_gate_base)
>> +#define clk_read(dev) readl((dev)->clk_gate_base)
>> +
>> +#define reg_read(dev, offset) readl((dev)->base + (offset))
>> +#define reg_write(dev, offset, val) writel(val, (dev)->base + (offset))
>> +
>> +#define reg_read_field(dev, offset, mask) get_field(reg_read((dev),
>> (offset), \
>> + mask))
>> +
>> +static inline int get_field(u32 value, u32 mask)
>> +{
>> + return (value & mask) >> __ffs(mask);
>> +}
>> +
>> +static inline void set_field(u32 *valp, u32 field, u32 mask)
>> +{
>> + u32 val = *valp;
>> +
>> + val &= ~mask;
>> + val |= (field << __ffs(mask)) & mask;
>> + *valp = val;
>> +}
>> +
>> +static inline void reg_write_field(struct unicam_cfg *dev, u32 offset,
>> + u32 field, u32 mask)
>> +{
>> + u32 val = reg_read((dev), (offset));
>> +
>> + set_field(&val, field, mask);
>> + reg_write((dev), (offset), val);
>> +}
>> +
>> +/* Format setup functions */
>> +
>> +static int find_depth_by_code(u32 code)
>> +{
>> + const struct unicam_fmt *fmt;
>> + unsigned int k;
>> +
>> + for (k = 0; k < ARRAY_SIZE(formats); k++) {
>> + fmt = &formats[k];
>> + if (fmt->code == code)
>> + return fmt->depth;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static inline int unicam_runtime_get(struct unicam_device *dev)
>> +{
>> + int r;
>> +
>> + r = pm_runtime_get_sync(&dev->pdev->dev);
>> +
>> + return r;
>> +}
>> +
>> +static inline void unicam_runtime_put(struct unicam_device *dev)
>> +{
>> + pm_runtime_put_sync(&dev->pdev->dev);
>> +}
>> +
>> +static const struct unicam_fmt *find_format_by_code(struct unicam_device
>> *dev,
>> + u32 code)
>> +{
>> + const struct unicam_fmt *fmt;
>> + unsigned int k;
>> +
>> + for (k = 0; k < dev->num_active_fmt; k++) {
>> + fmt = &dev->active_fmts[k];
>> + if (fmt->code == code)
>> + return fmt;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static const struct unicam_fmt *find_format_by_pix(struct unicam_device
>> *dev,
>> + u32 pixelformat)
>> +{
>> + const struct unicam_fmt *fmt;
>> + unsigned int k;
>> +
>> + for (k = 0; k < dev->num_active_fmt; k++) {
>> + fmt = &dev->active_fmts[k];
>> + if (fmt->fourcc == pixelformat)
>> + return fmt;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> +static char *fourcc_to_str(u32 fmt)
>> +{
>> + static char code[5];
>> +
>> + code[0] = (unsigned char)(fmt & 0xff);
>> + code[1] = (unsigned char)((fmt >> 8) & 0xff);
>> + code[2] = (unsigned char)((fmt >> 16) & 0xff);
>> + code[3] = (unsigned char)((fmt >> 24) & 0xff);
>> + code[4] = '\0';
>> +
>> + return code;
>> +}
>
>
> I understand that there can be two instances of this device, so using a
> static char is
> wrong.
>
> I think this function can be a useful addition to v4l2-common.c/h.
>
> BTW, v4l2-ctl uses this function to convert a fourcc to a string:
>
> std::string fcc2s(unsigned int val)
> {
> std::string s;
>
> s += val & 0x7f;
> s += (val >> 8) & 0x7f;
> s += (val >> 16) & 0x7f;
> s += (val >> 24) & 0x7f;
> if (val & (1 << 31))
> s += "-BE";
> return s;
> }
>
> Bit 31 has special meaning.
>
> Proposal for v4l2-common.h:
>
> #define V4L2_FOURCC_MAX_SIZE 8
> char *v4l2_fourcc2s(u32 fourcc, char *buf);
>
> This function fills in buf and returns buf.
OK, I'll do this as an extra patch.
>> +
>> +static void dump_active_formats(struct unicam_device *dev)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < dev->num_active_fmt; i++) {
>> + unicam_dbg(3, dev, "active_fmt[%d] (%p) is code %04X,
>> fourcc %s, depth %d\n",
>> + i, &dev->active_fmts[i],
>> dev->active_fmts[i].code,
>> + fourcc_to_str(dev->active_fmts[i].fourcc),
>> + dev->active_fmts[i].depth);
>> + }
>> +}
>> +
>> +static inline int bytes_per_line(u32 width, const struct unicam_fmt *fmt)
>> +{
>> + /* Stride must be a multiple of 16. */
>> + return ALIGN((width * fmt->depth) >> 3, 16);
>> +}
>> +
>> +static int __subdev_get_format(struct unicam_device *dev,
>> + struct v4l2_mbus_framefmt *fmt)
>> +{
>> + struct v4l2_subdev_format sd_fmt = {0};
>> + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
>> + int ret;
>> +
>> + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
>> + sd_fmt.pad = 0;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, get_fmt,
>> dev->sensor_config,
>> + &sd_fmt);
>> + if (ret < 0)
>> + return ret;
>> +
>> + *fmt = *mbus_fmt;
>> +
>> + unicam_dbg(1, dev, "%s %dx%d code:%04X\n", __func__,
>> + fmt->width, fmt->height, fmt->code);
>> +
>> + return 0;
>> +}
>> +
>> +static int __subdev_set_format(struct unicam_device *dev,
>> + struct v4l2_mbus_framefmt *fmt)
>> +{
>> + struct v4l2_subdev_format sd_fmt;
>> + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
>> + int ret;
>> +
>> + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
>> + sd_fmt.pad = 0;
>> + *mbus_fmt = *fmt;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt,
>> dev->sensor_config,
>> + &sd_fmt);
>> + if (ret < 0)
>> + return ret;
>> +
>> + unicam_dbg(1, dev, "%s %dx%d code:%04X\n", __func__,
>> + fmt->width, fmt->height, fmt->code);
>> +
>> + return 0;
>> +}
>> +
>> +static int unicam_calc_format_size(struct unicam_device *dev,
>> + const struct unicam_fmt *fmt,
>> + struct v4l2_format *f)
>> +{
>> + int min_bytesperline, min_sizeimage;
>> +
>> + if (!fmt) {
>> + unicam_dbg(3, dev, "No unicam_fmt provided!\n");
>> + return -EINVAL;
>> + }
>> +
>> + v4l_bound_align_image(&f->fmt.pix.width, 16, MAX_WIDTH, 2,
>> + &f->fmt.pix.height, 16, MAX_HEIGHT, 0, 0);
>> +
>> + min_bytesperline = bytes_per_line(f->fmt.pix.width, fmt);
>> + if (f->fmt.pix.bytesperline > min_bytesperline)
>> + f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.bytesperline,
>> 16);
>> + else
>> + f->fmt.pix.bytesperline = min_bytesperline;
>> +
>> + min_sizeimage = f->fmt.pix.height *
>> + f->fmt.pix.bytesperline;
>> + if (f->fmt.pix.sizeimage < min_sizeimage)
>> + f->fmt.pix.sizeimage = min_sizeimage;
>
>
> As mentioned in the earlier discussion apps can't set this.
Yes, I'll update that.
>> +
>> + unicam_dbg(1, dev, "width %d, fmt %s, depth %d\n",
>> + f->fmt.pix.width,
>> fourcc_to_str(f->fmt.pix.pixelformat),
>> + fmt->depth);
>> + unicam_dbg(3, dev, "%s: fourcc: %s size: %dx%d bpl:%d
>> img_size:%d\n",
>> + __func__, fourcc_to_str(f->fmt.pix.pixelformat),
>> + f->fmt.pix.width, f->fmt.pix.height,
>> + f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
>> +
>> + return 0;
>> +}
>> +
>> +static void unicam_wr_dma_addr(struct unicam_device *dev, unsigned int
>> dmaaddr)
>> +{
>> + unicam_dbg(1, dev, "wr_dma_addr %08X-%08X\n",
>> + dmaaddr, dmaaddr + dev->v_fmt.fmt.pix.sizeimage);
>> + reg_write(&dev->cfg, UNICAM_IBSA0, dmaaddr);
>> + reg_write(&dev->cfg,
>> + UNICAM_IBEA0,
>> + dmaaddr + dev->v_fmt.fmt.pix.sizeimage);
>> + reg_write(&dev->cfg, UNICAM_DBSA0, (uint32_t)dmaaddr);
>> + reg_write(&dev->cfg, UNICAM_DBEA0, (uint32_t)dmaaddr + (16 <<
>> 10));
>> +}
>> +
>> +static inline void unicam_schedule_next_buffer(struct unicam_device *dev)
>> +{
>> + struct unicam_dmaqueue *dma_q = &dev->dma_queue;
>> + struct unicam_buffer *buf;
>> + unsigned long addr;
>> +
>> + buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
>> + dev->next_frm = buf;
>> + list_del(&buf->list);
>> +
>> + addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
>> + unicam_wr_dma_addr(dev, addr);
>> +}
>> +
>> +static inline void unicam_process_buffer_complete(struct unicam_device
>> *dev)
>> +{
>> + dev->cur_frm->vb.field = dev->m_fmt.field;
>> + dev->cur_frm->vb.sequence = dev->sequence++;
>> +
>> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
>> + dev->cur_frm = dev->next_frm;
>> +}
>> +
>> +/*
>> + * unicam_isr : ISR handler for unicam capture
>> + * @irq: irq number
>> + * @dev_id: dev_id ptr
>> + *
>> + * It changes status of the captured buffer, takes next buffer from the
>> queue
>> + * and sets its address in unicam registers
>> + */
>> +static irqreturn_t unicam_isr(int irq, void *dev)
>> +{
>> + struct unicam_device *unicam = (struct unicam_device *)dev;
>> + int ista, sta;
>> + struct unicam_cfg *cfg = &unicam->cfg;
>> + struct unicam_dmaqueue *dma_q = &unicam->dma_queue;
>> +
>> + /*
>> + * Don't service interrupts if not streaming.
>> + * Avoids issues if the VPU should enable the
>> + * peripheral without the kernel knowing (that
>> + * shouldn't happen, but causes issues if it does).
>> + */
>> + if (!unicam->streaming)
>> + return IRQ_HANDLED;
>> +
>> + sta = reg_read(cfg, UNICAM_STA);
>> + /* Write value back to clear the interrupts */
>> + reg_write(cfg, UNICAM_STA, sta);
>> +
>> + ista = reg_read(cfg, UNICAM_ISTA);
>> + /* Write value back to clear the interrupts */
>> + reg_write(cfg, UNICAM_ISTA, ista);
>> +
>> + if (!(sta && (UNICAM_IS | UNICAM_PI0)))
>> + return IRQ_HANDLED;
>> +
>> + if (ista & UNICAM_FSI) {
>> + /*
>> + * Timestamp is to be when the first data byte was
>> captured,
>> + * aka frame start.
>> + */
>> + if (unicam->cur_frm)
>> + unicam->cur_frm->vb.vb2_buf.timestamp =
>> ktime_get_ns();
>> + }
>> + if (ista & UNICAM_FEI || sta & UNICAM_PI0) {
>> + /*
>> + * Ensure we have swapped buffers already as we can't
>> + * stop the peripheral. Overwrite the frame we've just
>> + * captured instead.
>> + */
>> + if (unicam->cur_frm &&
>> + unicam->cur_frm != unicam->next_frm)
>> + unicam_process_buffer_complete(unicam);
>> + }
>> +
>> + if (ista & (UNICAM_FSI | UNICAM_LCI)) {
>> + spin_lock(&unicam->dma_queue_lock);
>> + if (!list_empty(&dma_q->active) &&
>> + unicam->cur_frm == unicam->next_frm)
>> + unicam_schedule_next_buffer(unicam);
>> + spin_unlock(&unicam->dma_queue_lock);
>> + }
>> +
>> + if (reg_read(&unicam->cfg, UNICAM_ICTL) & UNICAM_FCM) {
>> + /* Switch out of trigger mode if selected */
>> + reg_write_field(&unicam->cfg, UNICAM_ICTL, 1, UNICAM_TFC);
>> + reg_write_field(&unicam->cfg, UNICAM_ICTL, 0, UNICAM_FCM);
>> + }
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static int unicam_querycap(struct file *file, void *priv,
>> + struct v4l2_capability *cap)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> +
>> + strlcpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver));
>> + strlcpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card));
>> +
>> + snprintf(cap->bus_info, sizeof(cap->bus_info),
>> + "platform:%s", dev->v4l2_dev.name);
>> + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
>> + V4L2_CAP_READWRITE;
>> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
>
>
> This has changed. Instead set the device_caps field in struct video_device.
> The v4l2 core will then fill in these two fields for you based on the struct
> video_device device_caps field.
OK, will adopt the new mechanism.
>> + return 0;
>> +}
>> +
>> +static int unicam_enum_fmt_vid_cap(struct file *file, void *priv,
>> + struct v4l2_fmtdesc *f)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + const struct unicam_fmt *fmt = NULL;
>> +
>> + if (f->index >= dev->num_active_fmt)
>> + return -EINVAL;
>> +
>> + fmt = &dev->active_fmts[f->index];
>> +
>> + f->pixelformat = fmt->fourcc;
>> + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>
>
> No need to set type.
Done.
>> + return 0;
>> +}
>> +
>> +static int unicam_g_fmt_vid_cap(struct file *file, void *priv,
>> + struct v4l2_format *f)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> +
>> + *f = dev->v_fmt;
>> +
>> + return 0;
>> +}
>> +
>> +static int unicam_try_fmt_vid_cap(struct file *file, void *priv,
>> + struct v4l2_format *f)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + const struct unicam_fmt *fmt;
>> + struct v4l2_subdev_format sd_fmt;
>> + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
>> + int ret;
>> +
>> + fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat);
>> + if (!fmt) {
>> + unicam_dbg(3, dev, "Fourcc format (0x%08x) not found.\n",
>> + f->fmt.pix.pixelformat);
>> +
>> + /* Just get the first one enumerated */
>> + fmt = &dev->active_fmts[0];
>> + f->fmt.pix.pixelformat = fmt->fourcc;
>> + }
>> +
>> + sd_fmt.which = V4L2_SUBDEV_FORMAT_TRY;
>> + sd_fmt.pad = 0;
>> +
>> + v4l2_fill_mbus_format(mbus_fmt, &f->fmt.pix, fmt->code);
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt,
>> dev->sensor_config,
>> + &sd_fmt);
>> + if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
>> + return ret;
>> +
>> + v4l2_fill_pix_format(&f->fmt.pix, &sd_fmt.format);
>> +
>> + /*
>> + * Use current colorspace for now, it will get
>> + * updated properly during s_fmt
>> + */
>> + f->fmt.pix.colorspace = dev->v_fmt.fmt.pix.colorspace;
>> + return unicam_calc_format_size(dev, fmt, f);
>> +}
>> +
>> +static int unicam_s_fmt_vid_cap(struct file *file, void *priv,
>> + struct v4l2_format *f)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + struct vb2_queue *q = &dev->buffer_queue;
>> + const struct unicam_fmt *fmt;
>> + struct v4l2_mbus_framefmt mbus_fmt = {0};
>> + int ret;
>> +
>> + if (vb2_is_busy(q)) {
>> + unicam_dbg(3, dev, "%s device busy\n", __func__);
>
>
> debug message seems pointless since the error code indicates this already.
Done.
>> + return -EBUSY;
>> + }
>> +
>> + ret = unicam_try_fmt_vid_cap(file, priv, f);
>> + if (ret < 0)
>> + return ret;
>> +
>> + fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat);
>> + dump_active_formats(dev);
>> +
>> + v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, fmt->code);
>> +
>> + ret = __subdev_set_format(dev, &mbus_fmt);
>> + if (ret) {
>> + unicam_dbg(3, dev,
>> + "%s __subdev_set_format failed %d\n",
>> + __func__, ret);
>> + return ret;
>> + }
>> +
>> + /* Just double check nothing has gone wrong */
>> + if (mbus_fmt.code != fmt->code) {
>> + unicam_dbg(3, dev,
>> + "%s subdev changed format on us, this should
>> not happen\n",
>> + __func__);
>> + return -EINVAL;
>> + }
>> +
>> + v4l2_fill_pix_format(&dev->v_fmt.fmt.pix, &mbus_fmt);
>> + dev->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>> + dev->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
>> + dev->v_fmt.fmt.pix.bytesperline = f->fmt.pix.bytesperline;
>> + dev->v_fmt.fmt.pix.sizeimage = f->fmt.pix.sizeimage;
>> + unicam_calc_format_size(dev, fmt, &dev->v_fmt);
>> +
>> + unicam_dbg(3, dev,
>> + "%s %dx%d, mbus_fmt %s, V4L2 pix %s. About to overwrite
>> pix with %s\n",
>> + __func__,
>> + dev->v_fmt.fmt.pix.width,
>> + dev->v_fmt.fmt.pix.height,
>> + fourcc_to_str(mbus_fmt.code),
>> + fourcc_to_str(dev->v_fmt.fmt.pix.pixelformat),
>> + fourcc_to_str(fmt->fourcc));
>> +
>> + dev->fmt = fmt;
>> + dev->m_fmt = mbus_fmt;
>> + *f = dev->v_fmt;
>> +
>> + return 0;
>> +}
>> +
>> +static int unicam_queue_setup(struct vb2_queue *vq,
>> + unsigned int *nbuffers,
>> + unsigned int *nplanes,
>> + unsigned int sizes[],
>> + struct device *alloc_devs[])
>> +{
>> + struct unicam_device *dev = vb2_get_drv_priv(vq);
>> + unsigned int size = dev->v_fmt.fmt.pix.sizeimage;
>> +
>> + if (vq->num_buffers + *nbuffers < 3)
>> + *nbuffers = 3 - vq->num_buffers;
>> +
>> + if (*nplanes) {
>> + if (sizes[0] < size) {
>> + unicam_err(dev, "sizes[0] %i < size %u\n",
>> + sizes[0], size);
>> + return -EINVAL;
>> + }
>> + size = sizes[0];
>> + }
>> +
>> + *nplanes = 1;
>> + sizes[0] = size;
>> +
>> + return 0;
>> +}
>> +
>> +static int unicam_buffer_prepare(struct vb2_buffer *vb)
>> +{
>> + struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue);
>> + struct unicam_buffer *buf = container_of(vb, struct unicam_buffer,
>> + vb.vb2_buf);
>> + unsigned long size;
>> +
>> + if (WARN_ON(!dev->fmt))
>> + return -EINVAL;
>> +
>> + size = dev->v_fmt.fmt.pix.sizeimage;
>> + if (vb2_plane_size(vb, 0) < size) {
>> + unicam_err(dev, "data will not fit into plane (%lu <
>> %lu)\n",
>> + vb2_plane_size(vb, 0), size);
>> + return -EINVAL;
>> + }
>> +
>> + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
>> + return 0;
>> +}
>> +
>> +static void unicam_buffer_queue(struct vb2_buffer *vb)
>> +{
>> + struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue);
>> + struct unicam_buffer *buf = container_of(vb, struct unicam_buffer,
>> + vb.vb2_buf);
>> + struct unicam_dmaqueue *dma_queue = &dev->dma_queue;
>> + unsigned long flags = 0;
>> +
>> + /* recheck locking */
>> + spin_lock_irqsave(&dev->dma_queue_lock, flags);
>> + list_add_tail(&buf->list, &dma_queue->active);
>> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
>> +}
>> +
>> +static void unicam_wr_dma_config(struct unicam_device *dev,
>> + unsigned int stride)
>> +{
>> + reg_write(&dev->cfg, UNICAM_IBLS, stride);
>> +}
>> +
>> +static void unicam_set_packing_config(struct unicam_device *dev)
>> +{
>> + int pack, unpack;
>> + u32 val;
>> + int mbus_depth = find_depth_by_code(dev->fmt->code);
>> + int v4l2_depth = dev->fmt->depth;
>> +
>> + if (mbus_depth == v4l2_depth) {
>> + unpack = UNICAM_PUM_NONE;
>> + pack = UNICAM_PPM_NONE;
>> + } else {
>> + switch (mbus_depth) {
>> + case 8:
>> + unpack = UNICAM_PUM_UNPACK8;
>> + break;
>> + case 10:
>> + unpack = UNICAM_PUM_UNPACK10;
>> + break;
>> + case 12:
>> + unpack = UNICAM_PUM_UNPACK12;
>> + break;
>> + case 14:
>> + unpack = UNICAM_PUM_UNPACK14;
>> + break;
>> + case 16:
>> + unpack = UNICAM_PUM_UNPACK16;
>> + break;
>> + default:
>> + unpack = UNICAM_PUM_NONE;
>> + break;
>> + }
>> + switch (v4l2_depth) {
>> + case 8:
>> + pack = UNICAM_PPM_PACK8;
>> + break;
>> + case 10:
>> + pack = UNICAM_PPM_PACK10;
>> + break;
>> + case 12:
>> + pack = UNICAM_PPM_PACK12;
>> + break;
>> + case 14:
>> + pack = UNICAM_PPM_PACK14;
>> + break;
>> + case 16:
>> + pack = UNICAM_PPM_PACK16;
>> + break;
>> + default:
>> + pack = UNICAM_PPM_NONE;
>> + break;
>> + }
>> + }
>> +
>> + val = 0;
>> + set_field(&val, 2, UNICAM_DEBL_MASK);
>> + set_field(&val, unpack, UNICAM_PUM_MASK);
>> + set_field(&val, pack, UNICAM_PPM_MASK);
>> + reg_write(&dev->cfg, UNICAM_IPIPE, val);
>> +}
>> +
>> +static void unicam_cfg_image_id(struct unicam_device *dev)
>> +{
>> + struct unicam_cfg *cfg = &dev->cfg;
>> +
>> + if (dev->bus_type == V4L2_MBUS_CSI2) {
>> + /* CSI2 mode */
>> + reg_write(cfg, UNICAM_IDI0,
>> + (dev->virtual_channel << 6) |
>> + dev->fmt->csi_dt);
>> + } else { /* CCP2 mode */
>> + reg_write(cfg, UNICAM_IDI0,
>> + (0x80 | dev->fmt->csi_dt));
>> + }
>> +}
>> +
>> +void unicam_start_rx(struct unicam_device *dev, unsigned long addr)
>> +{
>> + u32 val;
>> + unsigned int i;
>> + struct unicam_cfg *cfg = &dev->cfg;
>> + int line_int_freq = dev->v_fmt.fmt.pix.height >> 2;
>> +
>> + if (line_int_freq < 128)
>> + line_int_freq = 128;
>> +
>> + /* Enable lane clocks */
>> + val = 1;
>> + for (i = 0; i < dev->active_data_lanes; i++)
>> + val = val << 2 | 1;
>> + clk_write(cfg, val);
>> +
>> + /* Basic init */
>> + reg_write(cfg, UNICAM_CTRL, UNICAM_MEM);
>> +
>> + /* Enable analogue control, and leave in reset. */
>> + val = UNICAM_AR;
>> + set_field(&val, 7, UNICAM_CTATADJ_MASK);
>> + set_field(&val, 7, UNICAM_PTATADJ_MASK);
>> + reg_write(cfg, UNICAM_ANA, val);
>> + usleep_range(1000, 2000);
>> +
>> + /* Come out of reset */
>> + reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_AR);
>> +
>> + /* Peripheral reset */
>> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR);
>> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR);
>> +
>> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE);
>> +
>> + /* Enable Rx control. */
>> + val = reg_read(cfg, UNICAM_CTRL);
>> + set_field(&val, UNICAM_CPM_CSI2, UNICAM_CPM_MASK);
>> + set_field(&val, UNICAM_DCM_STROBE, UNICAM_DCM_MASK);
>> + set_field(&val, 0xF, UNICAM_PFT_MASK);
>> + set_field(&val, 128, UNICAM_OET_MASK);
>> + reg_write(cfg, UNICAM_CTRL, val);
>> +
>> + reg_write(cfg, UNICAM_IHWIN, 0);
>> + reg_write(cfg, UNICAM_IVWIN, 0);
>> +
>> + val = reg_read(&dev->cfg, UNICAM_PRI);
>> + set_field(&val, 0, UNICAM_BL_MASK);
>> + set_field(&val, 0, UNICAM_BS_MASK);
>> + set_field(&val, 0xE, UNICAM_PP_MASK);
>> + set_field(&val, 8, UNICAM_NP_MASK);
>> + set_field(&val, 2, UNICAM_PT_MASK);
>> + set_field(&val, 1, UNICAM_PE);
>> + reg_write(cfg, UNICAM_PRI, val);
>> +
>> + reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_DDL);
>> +
>> + /* Always start in trigger frame capture mode (UNICAM_FCM set) */
>> + val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM;
>> + set_field(&val, line_int_freq, UNICAM_LCIE_MASK);
>> + reg_write(cfg, UNICAM_ICTL, val);
>> + reg_write(cfg, UNICAM_STA, UNICAM_STA_MASK_ALL);
>> + reg_write(cfg, UNICAM_ISTA, UNICAM_ISTA_MASK_ALL);
>> +
>> + /* tclk_term_en */
>> + reg_write_field(cfg, UNICAM_CLT, 2, UNICAM_CLT1_MASK);
>> + /* tclk_settle */
>> + reg_write_field(cfg, UNICAM_CLT, 6, UNICAM_CLT2_MASK);
>> + /* td_term_en */
>> + reg_write_field(cfg, UNICAM_DLT, 2, UNICAM_DLT1_MASK);
>> + /* ths_settle */
>> + reg_write_field(cfg, UNICAM_DLT, 6, UNICAM_DLT2_MASK);
>> + /* trx_enable */
>> + reg_write_field(cfg, UNICAM_DLT, 0, UNICAM_DLT3_MASK);
>> +
>> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_SOE);
>> +
>> + val = 0;
>> + set_field(&val, 1, UNICAM_PCE);
>> + set_field(&val, 1, UNICAM_GI);
>> + set_field(&val, 1, UNICAM_CPH);
>> + set_field(&val, 0, UNICAM_PCVC_MASK);
>> + set_field(&val, 1, UNICAM_PCDT_MASK);
>> + reg_write(cfg, UNICAM_CMP0, val);
>> +
>> + /* Enable clock lane */
>> + val = 0;
>> + set_field(&val, 1, UNICAM_CLE);
>> + set_field(&val, 1, UNICAM_CLLPE);
>> + reg_write(cfg, UNICAM_CLK, val);
>> +
>> + /* Enable required data lanes */
>> + val = 0;
>> + set_field(&val, 1, UNICAM_DLE);
>> + set_field(&val, 1, UNICAM_DLLPE);
>> + reg_write(cfg, UNICAM_DAT0, val);
>> +
>> + if (dev->active_data_lanes == 1)
>> + val = 0;
>> + reg_write(cfg, UNICAM_DAT1, val);
>> +
>> + if (dev->cfg.periph_max_data_lanes > 2) {
>> + if (dev->active_data_lanes == 2)
>> + val = 0;
>> + reg_write(cfg, UNICAM_DAT2, val);
>> +
>> + if (dev->active_data_lanes == 3)
>> + val = 0;
>> + reg_write(cfg, UNICAM_DAT3, val);
>> + }
>> +
>> + unicam_wr_dma_config(dev, dev->v_fmt.fmt.pix.bytesperline);
>> + unicam_wr_dma_addr(dev, addr);
>> + unicam_set_packing_config(dev);
>> + unicam_cfg_image_id(dev);
>> +
>> + val = 0;
>> + set_field(&val, 0, UNICAM_EDL_MASK);
>> + reg_write(cfg, UNICAM_DCS, val);
>> +
>> + val = reg_read(cfg, UNICAM_MISC);
>> + set_field(&val, 1, UNICAM_FL0);
>> + set_field(&val, 1, UNICAM_FL1);
>> + reg_write(cfg, UNICAM_MISC, val);
>> +
>> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPE);
>> +
>> + reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_LIP_MASK);
>> +
>> + reg_write_field(cfg, UNICAM_DCS, 1, UNICAM_LDP);
>> +
>> + /*
>> + * Enable trigger only for the first frame to
>> + * sync correctly to the FS from the source.
>> + */
>> + reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_TFC);
>> +}
>> +
>> +static void unicam_disable(struct unicam_device *dev)
>> +{
>> + struct unicam_cfg *cfg = &dev->cfg;
>> +
>> + /* Analogue lane control disable */
>> + reg_write_field(cfg, UNICAM_ANA, 1, UNICAM_DDL);
>> +
>> + /* Stop the output engine */
>> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_SOE);
>> +
>> + /* Disable the data lanes. */
>> + reg_write(cfg, UNICAM_DAT0, 0);
>> + reg_write(cfg, UNICAM_DAT1, 0);
>> +
>> + if (dev->cfg.periph_max_data_lanes > 2) {
>> + reg_write(cfg, UNICAM_DAT2, 0);
>> + reg_write(cfg, UNICAM_DAT3, 0);
>> + }
>> +
>> + /* Peripheral reset */
>> + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR);
>> + usleep_range(50, 100);
>> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR);
>> +
>> + /* Disable peripheral */
>> + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE);
>> +
>> + /* Disable all lane clocks */
>> + clk_write(cfg, 0);
>> +}
>> +
>> +static int unicam_start_streaming(struct vb2_queue *vq, unsigned int
>> count)
>> +{
>> + struct unicam_device *dev = vb2_get_drv_priv(vq);
>> + struct unicam_dmaqueue *dma_q = &dev->dma_queue;
>> + struct unicam_buffer *buf, *tmp;
>> + unsigned long addr = 0;
>> + unsigned long flags;
>> + int ret;
>> +
>> + spin_lock_irqsave(&dev->dma_queue_lock, flags);
>> + if (list_empty(&dma_q->active)) {
>> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
>> + unicam_dbg(3, dev, "buffer queue is empty\n");
>> + return -EIO;
>
>
> This can't happen. This function will only be called if at least 2 buffers
> have been queued (the value you set as min_buffers_needed).
OK, I'll remove it.
>> + }
>> +
>> + buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
>> + dev->cur_frm = buf;
>> + dev->next_frm = buf;
>> + list_del(&buf->list);
>> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
>> +
>> + addr = vb2_dma_contig_plane_dma_addr(&dev->cur_frm->vb.vb2_buf,
>> 0);
>> + dev->sequence = 0;
>> +
>> + ret = unicam_runtime_get(dev);
>> + if (ret < 0) {
>> + unicam_dbg(3, dev, "unicam_runtime_get failed\n");
>> + goto err_release_buffers;
>> + }
>> +
>> + dev->active_data_lanes = dev->max_data_lanes;
>> + if (v4l2_subdev_has_op(dev->sensor, video, g_mbus_config)) {
>> + struct v4l2_mbus_config mbus_config;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, g_mbus_config,
>> + &mbus_config);
>> + if (ret < 0) {
>> + unicam_dbg(3, dev, "g_mbus_config failed\n");
>> + goto err_pm_put;
>> + }
>> +
>> + switch (mbus_config.flags & V4L2_MBUS_CSI2_LANES) {
>> + case V4L2_MBUS_CSI2_1_LANE:
>> + dev->active_data_lanes = 1;
>> + break;
>> + case V4L2_MBUS_CSI2_2_LANE:
>> + dev->active_data_lanes = 2;
>> + break;
>> + case V4L2_MBUS_CSI2_3_LANE:
>> + dev->active_data_lanes = 3;
>> + break;
>> + case V4L2_MBUS_CSI2_4_LANE:
>> + dev->active_data_lanes = 4;
>> + break;
>> + default:
>> + unicam_err(dev, "Invalid CSI2 lane flag value -
>> %X\n",
>> + mbus_config.flags &
>> V4L2_MBUS_CSI2_LANES);
>> + break;
>> + }
>> + }
>> + if (dev->active_data_lanes > dev->cfg.periph_max_data_lanes) {
>> + unicam_err(dev, "Device has requested %u data lanes, which
>> is >%u supported by peripheral",
>> + dev->active_data_lanes,
>> + dev->cfg.periph_max_data_lanes);
>> + ret = -EINVAL;
>> + goto err_pm_put;
>> + }
>> +
>> + unicam_dbg(1, dev, "Running with %u data lanes\n",
>> + dev->active_data_lanes);
>> +
>> + ret = clk_set_rate(dev->clock, 100 * 1000 * 1000);
>> + if (ret) {
>> + unicam_err(dev, "failed to set up clock\n");
>> + goto err_pm_put;
>> + }
>> +
>> + ret = clk_prepare_enable(dev->clock);
>> + if (ret) {
>> + unicam_err(dev, "Failed to enable CSI clock: %d\n", ret);
>> + goto err_pm_put;
>> + }
>> + ret = v4l2_subdev_call(dev->sensor, core, s_power, 1);
>> + if (ret < 0 && ret != -ENOIOCTLCMD) {
>> + unicam_err(dev, "power on failed in subdev\n");
>> + goto err_clock_unprepare;
>> + }
>> + dev->streaming = 1;
>> +
>> + unicam_start_rx(dev, addr);
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, s_stream, 1);
>> + if (ret < 0) {
>> + unicam_err(dev, "stream on failed in subdev\n");
>> + goto err_disable_unicam;
>> + }
>> +
>> + return 0;
>> +
>> +err_disable_unicam:
>> + unicam_disable(dev);
>> + v4l2_subdev_call(dev->sensor, core, s_power, 0);
>> +err_clock_unprepare:
>> + clk_disable_unprepare(dev->clock);
>> +err_pm_put:
>> + unicam_runtime_put(dev);
>> +err_release_buffers:
>> + list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
>> + list_del(&buf->list);
>> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
>> + }
>> + if (dev->cur_frm != dev->next_frm)
>> + vb2_buffer_done(&dev->next_frm->vb.vb2_buf,
>> + VB2_BUF_STATE_QUEUED);
>> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
>> + dev->next_frm = NULL;
>> + dev->cur_frm = NULL;
>> +
>> + return ret;
>> +}
>> +
>> +static void unicam_stop_streaming(struct vb2_queue *vq)
>> +{
>> + struct unicam_device *dev = vb2_get_drv_priv(vq);
>> + struct unicam_dmaqueue *dma_q = &dev->dma_queue;
>> + struct unicam_buffer *buf, *tmp;
>> + unsigned long flags;
>> +
>> + if (v4l2_subdev_call(dev->sensor, video, s_stream, 0) < 0)
>> + unicam_err(dev, "stream off failed in subdev\n");
>> +
>> + unicam_disable(dev);
>> +
>> + /* Release all active buffers */
>> + spin_lock_irqsave(&dev->dma_queue_lock, flags);
>> + list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
>> + list_del(&buf->list);
>> + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
>> + }
>> +
>> + if (dev->cur_frm == dev->next_frm) {
>> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf,
>> VB2_BUF_STATE_ERROR);
>> + } else {
>> + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf,
>> VB2_BUF_STATE_ERROR);
>> + vb2_buffer_done(&dev->next_frm->vb.vb2_buf,
>> + VB2_BUF_STATE_ERROR);
>> + }
>> + dev->cur_frm = NULL;
>> + dev->next_frm = NULL;
>> + spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
>> +
>> + if (v4l2_subdev_has_op(dev->sensor, core, s_power)) {
>> + if (v4l2_subdev_call(dev->sensor, core, s_power, 0) < 0)
>> + unicam_err(dev, "power off failed in subdev\n");
>> + }
>> +
>> + clk_disable_unprepare(dev->clock);
>> + unicam_runtime_put(dev);
>> +}
>> +
>> +static int unicam_enum_input(struct file *file, void *priv,
>> + struct v4l2_input *inp)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> +
>> + if (inp->index != 0)
>> + return -EINVAL;
>> +
>> + inp->type = V4L2_INPUT_TYPE_CAMERA;
>> + if (v4l2_subdev_has_op(dev->sensor, pad, dv_timings_cap)) {
>
>
> Use s_dv_timings instead of dv_timings_cap.
Done.
>> + inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
>> + inp->std = 0;
>> + } else if (v4l2_subdev_has_op(dev->sensor, video, querystd)) {
>
>
> Use s_std instead of querystd. FYI: querystd is not always implemented.
Done.
>> + inp->capabilities = V4L2_IN_CAP_STD;
>> + inp->std = V4L2_STD_ALL;
>
>
> This needs to come from the g_tvnorms op.
>
>> + } else {
>> + inp->capabilities = 0;
>> + inp->std = 0;
>> + }
>> + sprintf(inp->name, "Camera 0");
>> + return 0;
>> +}
>> +
>> +static int unicam_g_input(struct file *file, void *priv, unsigned int *i)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + *i = dev->input;
>> + return 0;
>> +}
>> +
>> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i,
>> 0, 0);
>> + else
>> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
>
>
> Drop this if-else entirely. s_routing makes really no sense when using a
> device
> tree. In this particular case there really is just one input, period.
I added this due to the ADV7282-M analogue to CSI bridge chip (uses
adv7180.c driver). It uses s_routing to select the physical input /
input type.
If this is dropped, what is the correct mechanism for selecting the
input? Unless I've missed it, s_routing is not a call that is exposed
to userspace, so we're stuck with composite input 1.
I had asked this question in previously [1], and whilst Sakari had
kindly replied with "s_routing() video op as it stands now is awful, I
hope no-one uses it", the fact is that it is used.
[1] http://www.spinics.net/lists/linux-media/msg115550.html
>> +
>> + /* Must always be able to set input to 0 */
>> + if (!i)
>> + ret = 0;
>> + if (!ret)
>> + dev->input = i;
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_querystd(struct file *file, void *priv,
>> + v4l2_std_id *std)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, querystd, std);
>> + return ret;
>
>
> No need for the local ret variable
Done here and in the next few functions.
>> +}
>> +
>> +static int unicam_g_std(struct file *file, void *priv, v4l2_std_id *std)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, g_std, std);
>> + return ret;
>> +}
>> +
>> +static int unicam_s_std(struct file *file, void *priv, v4l2_std_id std)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, s_std, std);
>> + return ret;
>> +}
>> +
>> +static int unicam_s_edid(struct file *file, void *priv, struct v4l2_edid
>> *edid)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, set_edid, edid);
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_g_edid(struct file *file, void *priv, struct v4l2_edid
>> *edid)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, get_edid, edid);
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_g_dv_timings(struct file *file, void *priv,
>> + struct v4l2_dv_timings *timings)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, g_dv_timings,
>> timings);
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_s_dv_timings(struct file *file, void *priv,
>> + struct v4l2_dv_timings *timings)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, s_dv_timings,
>> timings);
>> + if (ret)
>> + return ret;
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_query_dv_timings(struct file *file, void *priv,
>> + struct v4l2_dv_timings *timings)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, video, query_dv_timings,
>> timings);
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_enum_dv_timings(struct file *file, void *priv,
>> + struct v4l2_enum_dv_timings *timings)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, enum_dv_timings,
>> timings);
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_dv_timings_cap(struct file *file, void *priv,
>> + struct v4l2_dv_timings_cap *cap)
>> +{
>> + struct unicam_device *dev = video_drvdata(file);
>> + int ret;
>> +
>> + ret = v4l2_subdev_call(dev->sensor, pad, dv_timings_cap, cap);
>> +
>> + return ret;
>> +}
>> +
>> +static int unicam_subscribe_event(struct v4l2_fh *fh,
>> + const struct v4l2_event_subscription
>> *sub)
>> +{
>> + switch (sub->type) {
>> + case V4L2_EVENT_SOURCE_CHANGE:
>> + return v4l2_event_subscribe(fh, sub, 4, NULL);
>> + }
>> +
>> + return v4l2_ctrl_subscribe_event(fh, sub);
>> +}
>> +
>> +static void unicam_notify(struct v4l2_subdev *sd,
>> + unsigned int notification, void *arg)
>> +{
For some reason your email has got truncated at this point.
Copying from spinics the bits that you commented on, and apologies if
formatting goes wrong.
>> + }
>> +
>> + /* Save current subdev format */
>> + v4l2_fill_pix_format(&unicam->v_fmt.fmt.pix, &mbus_fmt);
>> + unicam->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>> + unicam->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
>> + unicam->v_fmt.fmt.pix.bytesperline = 0;
>> + unicam_calc_format_size(unicam, fmt, &unicam->v_fmt);
>> + unicam->fmt = fmt;
>> + unicam->m_fmt = mbus_fmt;
>> +
>> + if (v4l2_subdev_has_op(unicam->sensor, video, querystd)) {
>>
>
> Check against s_std
Done.
>> + if (v4l2_subdev_has_op(unicam->sensor, video, g_tvnorms)) {
>> + v4l2_std_id tvnorms;
>> +
>> + ret = v4l2_subdev_call(unicam->sensor, video,
>> + g_tvnorms, &tvnorms);
>> + if (ret) {
>> + unicam_dbg(1, unicam, "Sensor supports g_tvnorms, but returned error\n");
>> + unicam->video_dev.tvnorms |= V4L2_STD_ALL;
>>
>
> I recommend a WARN_ON and an error return. This really should not happen.
> If it does, then it is a subdev bug.
OK, WARN and return an error.
>> + } else {
>> + unicam->video_dev.tvnorms |= tvnorms;
>> + }
>> + } else {
>> + unicam->video_dev.tvnorms |= V4L2_STD_ALL;
>>
>
> Same here.
Done
>> + }
>> + }
>>
>
> Based on the subdev capabilities (sensor, STD, DV_TIMINGS) you should disable ioctls
> by calling v4l2_disable_ioctl. See e.g. drivers/media/platform/vivid/vivid-core.c.
OK, will do.
>> + vdev = &unicam->video_dev;
>> + strlcpy(vdev->name, UNICAM_MODULE_NAME, sizeof(vdev->name));
>> + vdev->release = video_device_release_empty;
>> + vdev->fops = &unicam_fops;
>> + vdev->ioctl_ops = &unicam_ioctl_ops;
>> + vdev->v4l2_dev = &unicam->v4l2_dev;
>> + vdev->vfl_dir = VFL_DIR_RX;
>> + vdev->queue = q;
>> + vdev->lock = &unicam->lock;
>> + vdev->dev_debug = 0xff;
>>
> Drop this line. Shouldn't be set by drivers.
Sorry, my debug that got left in :-(
> But you should set vdev->device_caps here.
Done.
>
> Overall this looks pretty good!
>
That's reassuring to hear after having had a fair few battles getting
it to this point.
I'll sort a V2 and try to get it out tomorrow.
Dave
On 06/15/17 15:38, Dave Stevenson wrote:
> Hi Hans.
>
> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>> Hi Dave,
>>
>> Here is a quick review of this driver. Once a v2 is posted I'll do a more
>> thorough
>> check.
>
> Thank you. I wasn't expecting such a quick response.
>
>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>>
>>> Add driver for the Unicam camera receiver block on
>>> BCM283x processors.
>>>
>>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>>> ---
>>> drivers/media/platform/Kconfig | 1 +
>>> drivers/media/platform/Makefile | 2 +
>>> drivers/media/platform/bcm2835/Kconfig | 14 +
>>> drivers/media/platform/bcm2835/Makefile | 3 +
>>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>>> ++++++++++++++++++++++
>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>>> 6 files changed, 2377 insertions(+)
>>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>>
>>> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
>>> +{
>>> + struct unicam_device *dev = video_drvdata(file);
>>> + int ret;
>>> +
>>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>>> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i,
>>> 0, 0);
>>> + else
>>> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
>>
>>
>> Drop this if-else entirely. s_routing makes really no sense when using a
>> device
>> tree. In this particular case there really is just one input, period.
>
> I added this due to the ADV7282-M analogue to CSI bridge chip (uses
> adv7180.c driver). It uses s_routing to select the physical input /
> input type.
> If this is dropped, what is the correct mechanism for selecting the
> input? Unless I've missed it, s_routing is not a call that is exposed
> to userspace, so we're stuck with composite input 1.
>
> I had asked this question in previously [1], and whilst Sakari had
> kindly replied with "s_routing() video op as it stands now is awful, I
> hope no-one uses it", the fact is that it is used.
>
> [1] http://www.spinics.net/lists/linux-media/msg115550.html
s_routing was developed for USB and PCI(e) devices and predates the device tree.
Basically USB and PCI drivers will have card definitions where USB/PCI card IDs
are mapped to card descriptions, and that includes information on the various
inputs (composite, S-Video, etc) that are available on the backplane and how those
physical connectors are hooked up to the pins on the video ICs.
The enum/s/g_input ioctls all show the end-user view, i.e. they enumerate the
inputs on the backpanel of the product. The s_routing op was created to map
such inputs to actual pins on the ICs.
For platform devices we would do this in the device tree today, but some of
the necessary bindings are still missing. Specifically those for connectors,
AFAIK those are not yet defined. It's been discussed, but never finalized.
So if this was done correctly you would use the connector endpoints in the
device tree to enumerate the inputs and use how they are connected to the
other blocks as the routing information (i.e. pad number).
I would say that is the advanced course and to do this later.
Do you even have hardware where you can switch between inputs?
Regards,
Hans
Hi Dave,
Am 15.06.2017 um 15:38 schrieb Dave Stevenson:
> Hi Hans.
>
> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>> Hi Dave,
>>
>> Here is a quick review of this driver. Once a v2 is posted I'll do a more
>> thorough
>> check.
> Thank you. I wasn't expecting such a quick response.
>
>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>> ...
>>>
>>> +
>>> +struct bayer_fmt {
>>> + u32 fourcc;
>>> + u8 depth;
>>> +};
>>> +
>>> +const struct bayer_fmt all_bayer_bggr[] = {
>>> + {V4L2_PIX_FMT_SBGGR8, 8},
>>> + {V4L2_PIX_FMT_SBGGR10P, 10},
>>> + {V4L2_PIX_FMT_SBGGR12, 12},
>>> + {V4L2_PIX_FMT_SBGGR16, 16},
>>> + {0, 0}
>>> +};
>>> +
>>> +const struct bayer_fmt all_bayer_rggb[] = {
>>> + {V4L2_PIX_FMT_SRGGB8, 8},
>>> + {V4L2_PIX_FMT_SRGGB10P, 10},
>>> + {V4L2_PIX_FMT_SRGGB12, 12},
>>> + /* V4L2_PIX_FMT_SRGGB16, 16},*/
>>
>> Why is this commented out? Either uncomment, add a proper comment explaining
>> why
>> or remove it.
> I was developing this against the Pi specific tree, and that is still
> on 4.9 which didn't have several of the 16 bit Bayer formats. I see
> that Sakari has added them (thank you Sakari), so I can uncomment
> them.
does this series work with Linux Mainline (incl. bcm283x dts files)?
In case not, please tell what is missing?
Regards
Stefan
On 15 June 2017 at 15:14, Hans Verkuil <hverkuil@xs4all.nl> wrote:
> On 06/15/17 15:38, Dave Stevenson wrote:
>> Hi Hans.
>>
>> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>> Hi Dave,
>>>
>>> Here is a quick review of this driver. Once a v2 is posted I'll do a more
>>> thorough
>>> check.
>>
>> Thank you. I wasn't expecting such a quick response.
>>
>>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>>>
>>>> Add driver for the Unicam camera receiver block on
>>>> BCM283x processors.
>>>>
>>>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>>>> ---
>>>> drivers/media/platform/Kconfig | 1 +
>>>> drivers/media/platform/Makefile | 2 +
>>>> drivers/media/platform/bcm2835/Kconfig | 14 +
>>>> drivers/media/platform/bcm2835/Makefile | 3 +
>>>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>>>> ++++++++++++++++++++++
>>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>>>> 6 files changed, 2377 insertions(+)
>>>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>>>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>>>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>>>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>>>
>>>> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
>>>> +{
>>>> + struct unicam_device *dev = video_drvdata(file);
>>>> + int ret;
>>>> +
>>>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>>>> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i,
>>>> 0, 0);
>>>> + else
>>>> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
>>>
>>>
>>> Drop this if-else entirely. s_routing makes really no sense when using a
>>> device
>>> tree. In this particular case there really is just one input, period.
>>
>> I added this due to the ADV7282-M analogue to CSI bridge chip (uses
>> adv7180.c driver). It uses s_routing to select the physical input /
>> input type.
>> If this is dropped, what is the correct mechanism for selecting the
>> input? Unless I've missed it, s_routing is not a call that is exposed
>> to userspace, so we're stuck with composite input 1.
>>
>> I had asked this question in previously [1], and whilst Sakari had
>> kindly replied with "s_routing() video op as it stands now is awful, I
>> hope no-one uses it", the fact is that it is used.
>>
>> [1] http://www.spinics.net/lists/linux-media/msg115550.html
>
> s_routing was developed for USB and PCI(e) devices and predates the device tree.
> Basically USB and PCI drivers will have card definitions where USB/PCI card IDs
> are mapped to card descriptions, and that includes information on the various
> inputs (composite, S-Video, etc) that are available on the backplane and how those
> physical connectors are hooked up to the pins on the video ICs.
>
> The enum/s/g_input ioctls all show the end-user view, i.e. they enumerate the
> inputs on the backpanel of the product. The s_routing op was created to map
> such inputs to actual pins on the ICs.
>
> For platform devices we would do this in the device tree today, but some of
> the necessary bindings are still missing. Specifically those for connectors,
> AFAIK those are not yet defined. It's been discussed, but never finalized.
>
> So if this was done correctly you would use the connector endpoints in the
> device tree to enumerate the inputs and use how they are connected to the
> other blocks as the routing information (i.e. pad number).
>
> I would say that is the advanced course and to do this later.
Certainly the advanced course, but I'm still not seeing how that all
hangs together.
To me that all sounds like stuff that ought to be within the ADV
driver? From my perspective as the CSI-2 receiver I only have one
input.
So how does the application select between those inputs?
Having had a bit of a grep I think the tvp5150 driver is doing what
you're suggesting. However that appears to force you into using the
media controller API. Is that not overkill particularly from an
application perspective?
You also say above that enum/s/g_input is all about switching between
physical connectors, and that's what I'm doing. I'm now getting lost
as to what is intended
> Do you even have hardware where you can switch between inputs?
I have an ADV7282-M eval board [1] sitting in front of me, with the
I2C and CSI-2 output hooked up to a butchered Pi camera board.
6 phono inputs set up as 2 single-ended composite inputs, and 2 pairs
of differentital composite inputs. It can be reconfigured to take
s-video, or component (although it needs a couple of surface mount
resistors changed to do component).
1 CSI-2 (single lane) output going to the Pi.
I haven't got it producing CSI data that the Pi is happy with yet, but
hopefully that is only a matter of time.
The I2C comms is all working.
With the driver as it stands I can use the s_input ioctl to send the
I2C for the relevant input. It was a few weeks ago I last played with
it, but IIRC it did appear to be detecting the incoming video standard
correctly on each of composite 1 and composite 2 (I haven't got
s-video or differential hooked up).
Dave
[1] http://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/EVAL-ADV7282MEBZ.html
On 06/15/17 17:11, Dave Stevenson wrote:
> On 15 June 2017 at 15:14, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>> On 06/15/17 15:38, Dave Stevenson wrote:
>>> Hi Hans.
>>>
>>> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>> Hi Dave,
>>>>
>>>> Here is a quick review of this driver. Once a v2 is posted I'll do a more
>>>> thorough
>>>> check.
>>>
>>> Thank you. I wasn't expecting such a quick response.
>>>
>>>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>>>>
>>>>> Add driver for the Unicam camera receiver block on
>>>>> BCM283x processors.
>>>>>
>>>>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>>>>> ---
>>>>> drivers/media/platform/Kconfig | 1 +
>>>>> drivers/media/platform/Makefile | 2 +
>>>>> drivers/media/platform/bcm2835/Kconfig | 14 +
>>>>> drivers/media/platform/bcm2835/Makefile | 3 +
>>>>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>>>>> ++++++++++++++++++++++
>>>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>>>>> 6 files changed, 2377 insertions(+)
>>>>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>>>>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>>>>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>>>>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>>>>
>>>>> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
>>>>> +{
>>>>> + struct unicam_device *dev = video_drvdata(file);
>>>>> + int ret;
>>>>> +
>>>>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>>>>> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i,
>>>>> 0, 0);
>>>>> + else
>>>>> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
>>>>
>>>>
>>>> Drop this if-else entirely. s_routing makes really no sense when using a
>>>> device
>>>> tree. In this particular case there really is just one input, period.
>>>
>>> I added this due to the ADV7282-M analogue to CSI bridge chip (uses
>>> adv7180.c driver). It uses s_routing to select the physical input /
>>> input type.
>>> If this is dropped, what is the correct mechanism for selecting the
>>> input? Unless I've missed it, s_routing is not a call that is exposed
>>> to userspace, so we're stuck with composite input 1.
>>>
>>> I had asked this question in previously [1], and whilst Sakari had
>>> kindly replied with "s_routing() video op as it stands now is awful, I
>>> hope no-one uses it", the fact is that it is used.
>>>
>>> [1] http://www.spinics.net/lists/linux-media/msg115550.html
>>
>> s_routing was developed for USB and PCI(e) devices and predates the device tree.
>> Basically USB and PCI drivers will have card definitions where USB/PCI card IDs
>> are mapped to card descriptions, and that includes information on the various
>> inputs (composite, S-Video, etc) that are available on the backplane and how those
>> physical connectors are hooked up to the pins on the video ICs.
>>
>> The enum/s/g_input ioctls all show the end-user view, i.e. they enumerate the
>> inputs on the backpanel of the product. The s_routing op was created to map
>> such inputs to actual pins on the ICs.
>>
>> For platform devices we would do this in the device tree today, but some of
>> the necessary bindings are still missing. Specifically those for connectors,
>> AFAIK those are not yet defined. It's been discussed, but never finalized.
>>
>> So if this was done correctly you would use the connector endpoints in the
>> device tree to enumerate the inputs and use how they are connected to the
>> other blocks as the routing information (i.e. pad number).
>>
>> I would say that is the advanced course and to do this later.
>
> Certainly the advanced course, but I'm still not seeing how that all
> hangs together.
>
> To me that all sounds like stuff that ought to be within the ADV
> driver? From my perspective as the CSI-2 receiver I only have one
> input.
As a csi receiver, yes. But the adv has a mux (or at least the adv7180
does) where it can switch between multiple Composite or S-Video inputs.
s_routing controls the mux.
But the end-user knows nothing about the internal routing, he only knows
about the connectors on the board. So with VIDIOC_ENUMINPUTS you can
see which inputs there are to choose from with names corresponding to
the labels on the backplane or in the user manual. With VIDIOC_S_INPUT
he can select an input, and the device tree then has to provide the
necessary information on how an input connector is hooked up to the adv.
> So how does the application select between those inputs?
>
> Having had a bit of a grep I think the tvp5150 driver is doing what
> you're suggesting. However that appears to force you into using the
> media controller API. Is that not overkill particularly from an
> application perspective?
Ah, nice. There are actually already connector bindings. I'd forgotten
those went in.
Anyway, the tvp5150 is used in two situations:
either as part of the USB non-MC device, or as part of a platform MC device.
You have a platform non-MC device. The tvp5150 doesn't support that, but
if it did, then the DT parsing could wouldn't be under CONFIG_MEDIA_CONTROLLER.
It should really be under CONFIG_OF since it is (mostly) unrelated to the MC.
But we're missing support for this scenario. For USB/PCI boards we have
card descriptions whose information is used in s_routing, for MC-devices
we leave it up to the user to set the routing (tvp5150_link_setup). But
we don't have anything for a non-MC device that use the device tree.
All the information is there, but we're missing infrastructure to
give the connector information to the main V4L2 driver so it can implement
the input ioctls, and to tell the subdev driver how to program the mux.
>
> You also say above that enum/s/g_input is all about switching between
> physical connectors, and that's what I'm doing. I'm now getting lost
> as to what is intended
Physical connectors as in connectors that users related to: Composite
inputs, S-Video, HDMI, etc. Not pins on a chip. How those connectors
are routed to pins on a chip is something that differs per board, so
that information belongs in the device tree.
I hope this clarifies it a bit.
Regards,
Hans
>
>> Do you even have hardware where you can switch between inputs?
>
> I have an ADV7282-M eval board [1] sitting in front of me, with the
> I2C and CSI-2 output hooked up to a butchered Pi camera board.
> 6 phono inputs set up as 2 single-ended composite inputs, and 2 pairs
> of differentital composite inputs. It can be reconfigured to take
> s-video, or component (although it needs a couple of surface mount
> resistors changed to do component).
> 1 CSI-2 (single lane) output going to the Pi.
>
> I haven't got it producing CSI data that the Pi is happy with yet, but
> hopefully that is only a matter of time.
> The I2C comms is all working.
> With the driver as it stands I can use the s_input ioctl to send the
> I2C for the relevant input. It was a few weeks ago I last played with
> it, but IIRC it did appear to be detecting the incoming video standard
> correctly on each of composite 1 and composite 2 (I haven't got
> s-video or differential hooked up).
>
> Dave
>
> [1] http://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/EVAL-ADV7282MEBZ.html
>
On 16 June 2017 at 15:05, Hans Verkuil <hverkuil@xs4all.nl> wrote:
> On 06/15/17 17:11, Dave Stevenson wrote:
>> On 15 June 2017 at 15:14, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>> On 06/15/17 15:38, Dave Stevenson wrote:
>>>> Hi Hans.
>>>>
>>>> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>>> Hi Dave,
>>>>>
>>>>> Here is a quick review of this driver. Once a v2 is posted I'll do a more
>>>>> thorough
>>>>> check.
>>>>
>>>> Thank you. I wasn't expecting such a quick response.
>>>>
>>>>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>>>>>
>>>>>> Add driver for the Unicam camera receiver block on
>>>>>> BCM283x processors.
>>>>>>
>>>>>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>>>>>> ---
>>>>>> drivers/media/platform/Kconfig | 1 +
>>>>>> drivers/media/platform/Makefile | 2 +
>>>>>> drivers/media/platform/bcm2835/Kconfig | 14 +
>>>>>> drivers/media/platform/bcm2835/Makefile | 3 +
>>>>>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>>>>>> ++++++++++++++++++++++
>>>>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>>>>>> 6 files changed, 2377 insertions(+)
>>>>>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>>>>>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>>>>>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>>>>>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>>>>>
>>>>>> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
>>>>>> +{
>>>>>> + struct unicam_device *dev = video_drvdata(file);
>>>>>> + int ret;
>>>>>> +
>>>>>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>>>>>> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i,
>>>>>> 0, 0);
>>>>>> + else
>>>>>> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
>>>>>
>>>>>
>>>>> Drop this if-else entirely. s_routing makes really no sense when using a
>>>>> device
>>>>> tree. In this particular case there really is just one input, period.
>>>>
>>>> I added this due to the ADV7282-M analogue to CSI bridge chip (uses
>>>> adv7180.c driver). It uses s_routing to select the physical input /
>>>> input type.
>>>> If this is dropped, what is the correct mechanism for selecting the
>>>> input? Unless I've missed it, s_routing is not a call that is exposed
>>>> to userspace, so we're stuck with composite input 1.
>>>>
>>>> I had asked this question in previously [1], and whilst Sakari had
>>>> kindly replied with "s_routing() video op as it stands now is awful, I
>>>> hope no-one uses it", the fact is that it is used.
>>>>
>>>> [1] http://www.spinics.net/lists/linux-media/msg115550.html
>>>
>>> s_routing was developed for USB and PCI(e) devices and predates the device tree.
>>> Basically USB and PCI drivers will have card definitions where USB/PCI card IDs
>>> are mapped to card descriptions, and that includes information on the various
>>> inputs (composite, S-Video, etc) that are available on the backplane and how those
>>> physical connectors are hooked up to the pins on the video ICs.
>>>
>>> The enum/s/g_input ioctls all show the end-user view, i.e. they enumerate the
>>> inputs on the backpanel of the product. The s_routing op was created to map
>>> such inputs to actual pins on the ICs.
>>>
>>> For platform devices we would do this in the device tree today, but some of
>>> the necessary bindings are still missing. Specifically those for connectors,
>>> AFAIK those are not yet defined. It's been discussed, but never finalized.
>>>
>>> So if this was done correctly you would use the connector endpoints in the
>>> device tree to enumerate the inputs and use how they are connected to the
>>> other blocks as the routing information (i.e. pad number).
>>>
>>> I would say that is the advanced course and to do this later.
>>
>> Certainly the advanced course, but I'm still not seeing how that all
>> hangs together.
>>
>> To me that all sounds like stuff that ought to be within the ADV
>> driver? From my perspective as the CSI-2 receiver I only have one
>> input.
>
> As a csi receiver, yes. But the adv has a mux (or at least the adv7180
> does) where it can switch between multiple Composite or S-Video inputs.
> s_routing controls the mux.
>
> But the end-user knows nothing about the internal routing, he only knows
> about the connectors on the board. So with VIDIOC_ENUMINPUTS you can
> see which inputs there are to choose from with names corresponding to
> the labels on the backplane or in the user manual. With VIDIOC_S_INPUT
> he can select an input, and the device tree then has to provide the
> necessary information on how an input connector is hooked up to the adv.
>
>> So how does the application select between those inputs?
>>
>> Having had a bit of a grep I think the tvp5150 driver is doing what
>> you're suggesting. However that appears to force you into using the
>> media controller API. Is that not overkill particularly from an
>> application perspective?
>
> Ah, nice. There are actually already connector bindings. I'd forgotten
> those went in.
>
> Anyway, the tvp5150 is used in two situations:
>
> either as part of the USB non-MC device, or as part of a platform MC device.
>
> You have a platform non-MC device. The tvp5150 doesn't support that, but
> if it did, then the DT parsing could wouldn't be under CONFIG_MEDIA_CONTROLLER.
>
> It should really be under CONFIG_OF since it is (mostly) unrelated to the MC.
>
> But we're missing support for this scenario. For USB/PCI boards we have
> card descriptions whose information is used in s_routing, for MC-devices
> we leave it up to the user to set the routing (tvp5150_link_setup). But
> we don't have anything for a non-MC device that use the device tree.
>
> All the information is there, but we're missing infrastructure to
> give the connector information to the main V4L2 driver so it can implement
> the input ioctls, and to tell the subdev driver how to program the mux.
That's the bit that I was stumbling over - there is a bit of
infrastructure missing.
So I'm reading that as the adv driver is incorrect in that it is just
exposing all the potential input configurations. It really needs the
DT connectors bit adding to refine the input selection down to the
actually available connectors on the physical board.
In my eval board case, DT should describe input connectors for 4
inputs, corresponding to CVBS_AIN1, CVBS_AIN2, DIFF_CVBS_AIN3_AIN4,
and DIFF_CVBS_AIN7_AIN8. The fact that I could externally connect
adapters to combine AIN1 and AIN2 to become s-video isn't relevant (or
at least secondary).
If we have a bit of infrastructure missing, what is the correct way
forward for this driver right now?
I was comparing against the am437x-vfpe, davinci/vpif_capture, and
blackfin/bfin_capture drivers. All of them in some shape or form take
VIDIOC_S_INPUT and end up calling s_routing. It may be incorrect, but
that is how several platforms are using it. Is it acceptable to adopt
this incorrect behaviour until the infrastructure changes are all
done?
As a relative mainline kernel newbie I'm slightly reluctant to
volunteer to implement the missing infrastructure, but with some
guidance in advance I'm willing to put together a patchset for
discussion, and adapt the adv driver to use DT connectors.
Then again the dtbindings for connectors in tvp5150 got reverted
although the driver didn't:
31e717d [media] Revert "[media] tvp5150: document input connectors DT bindings"
"There are still ongoing discussions about how the input connectors
will be supported by the Media Controller framework so until that
is settled, it is better to revert the connectors portion of the
bindings to avoid known to be broken bindings docs to hit mainline."
Did things ever get settled [1], or did it slip through the cracks?
There don't appear to be any input connector bindings described
anywhere I can find them.
This sounds like a topic to be discussed in a new thread rather than
hidden within a patch review.
[1] http://www.spinics.net/lists/linux-media/msg97792.html
>>
>> You also say above that enum/s/g_input is all about switching between
>> physical connectors, and that's what I'm doing. I'm now getting lost
>> as to what is intended
>
> Physical connectors as in connectors that users related to: Composite
> inputs, S-Video, HDMI, etc. Not pins on a chip. How those connectors
> are routed to pins on a chip is something that differs per board, so
> that information belongs in the device tree.
>
> I hope this clarifies it a bit.
The waters are still a little murky, but getting clearer. Thanks for
taking the time to try and clarify it.
I've been distracted by other things today, and combined with these
ongoing discissions I'm afraid V2 is going to be delayed until Monday
or Tuesday. Sorry about that.
Cheers.
Dave
On 06/16/2017 05:55 PM, Dave Stevenson wrote:
> On 16 June 2017 at 15:05, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>> On 06/15/17 17:11, Dave Stevenson wrote:
>>> On 15 June 2017 at 15:14, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>> On 06/15/17 15:38, Dave Stevenson wrote:
>>>>> Hi Hans.
>>>>>
>>>>> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>>>> Hi Dave,
>>>>>>
>>>>>> Here is a quick review of this driver. Once a v2 is posted I'll do a more
>>>>>> thorough
>>>>>> check.
>>>>>
>>>>> Thank you. I wasn't expecting such a quick response.
>>>>>
>>>>>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>>>>>>
>>>>>>> Add driver for the Unicam camera receiver block on
>>>>>>> BCM283x processors.
>>>>>>>
>>>>>>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>>>>>>> ---
>>>>>>> drivers/media/platform/Kconfig | 1 +
>>>>>>> drivers/media/platform/Makefile | 2 +
>>>>>>> drivers/media/platform/bcm2835/Kconfig | 14 +
>>>>>>> drivers/media/platform/bcm2835/Makefile | 3 +
>>>>>>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>>>>>>> ++++++++++++++++++++++
>>>>>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>>>>>>> 6 files changed, 2377 insertions(+)
>>>>>>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>>>>>>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>>>>>>> create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c
>>>>>>> create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>>>>>>
>>>>>>> +static int unicam_s_input(struct file *file, void *priv, unsigned int i)
>>>>>>> +{
>>>>>>> + struct unicam_device *dev = video_drvdata(file);
>>>>>>> + int ret;
>>>>>>> +
>>>>>>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>>>>>>> + ret = v4l2_subdev_call(dev->sensor, video, s_routing, i,
>>>>>>> 0, 0);
>>>>>>> + else
>>>>>>> + ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
>>>>>>
>>>>>>
>>>>>> Drop this if-else entirely. s_routing makes really no sense when using a
>>>>>> device
>>>>>> tree. In this particular case there really is just one input, period.
>>>>>
>>>>> I added this due to the ADV7282-M analogue to CSI bridge chip (uses
>>>>> adv7180.c driver). It uses s_routing to select the physical input /
>>>>> input type.
>>>>> If this is dropped, what is the correct mechanism for selecting the
>>>>> input? Unless I've missed it, s_routing is not a call that is exposed
>>>>> to userspace, so we're stuck with composite input 1.
>>>>>
>>>>> I had asked this question in previously [1], and whilst Sakari had
>>>>> kindly replied with "s_routing() video op as it stands now is awful, I
>>>>> hope no-one uses it", the fact is that it is used.
>>>>>
>>>>> [1] http://www.spinics.net/lists/linux-media/msg115550.html
>>>>
>>>> s_routing was developed for USB and PCI(e) devices and predates the device tree.
>>>> Basically USB and PCI drivers will have card definitions where USB/PCI card IDs
>>>> are mapped to card descriptions, and that includes information on the various
>>>> inputs (composite, S-Video, etc) that are available on the backplane and how those
>>>> physical connectors are hooked up to the pins on the video ICs.
>>>>
>>>> The enum/s/g_input ioctls all show the end-user view, i.e. they enumerate the
>>>> inputs on the backpanel of the product. The s_routing op was created to map
>>>> such inputs to actual pins on the ICs.
>>>>
>>>> For platform devices we would do this in the device tree today, but some of
>>>> the necessary bindings are still missing. Specifically those for connectors,
>>>> AFAIK those are not yet defined. It's been discussed, but never finalized.
>>>>
>>>> So if this was done correctly you would use the connector endpoints in the
>>>> device tree to enumerate the inputs and use how they are connected to the
>>>> other blocks as the routing information (i.e. pad number).
>>>>
>>>> I would say that is the advanced course and to do this later.
>>>
>>> Certainly the advanced course, but I'm still not seeing how that all
>>> hangs together.
>>>
>>> To me that all sounds like stuff that ought to be within the ADV
>>> driver? From my perspective as the CSI-2 receiver I only have one
>>> input.
>>
>> As a csi receiver, yes. But the adv has a mux (or at least the adv7180
>> does) where it can switch between multiple Composite or S-Video inputs.
>> s_routing controls the mux.
>>
>> But the end-user knows nothing about the internal routing, he only knows
>> about the connectors on the board. So with VIDIOC_ENUMINPUTS you can
>> see which inputs there are to choose from with names corresponding to
>> the labels on the backplane or in the user manual. With VIDIOC_S_INPUT
>> he can select an input, and the device tree then has to provide the
>> necessary information on how an input connector is hooked up to the adv.
>>
>>> So how does the application select between those inputs?
>>>
>>> Having had a bit of a grep I think the tvp5150 driver is doing what
>>> you're suggesting. However that appears to force you into using the
>>> media controller API. Is that not overkill particularly from an
>>> application perspective?
>>
>> Ah, nice. There are actually already connector bindings. I'd forgotten
>> those went in.
>>
>> Anyway, the tvp5150 is used in two situations:
>>
>> either as part of the USB non-MC device, or as part of a platform MC device.
>>
>> You have a platform non-MC device. The tvp5150 doesn't support that, but
>> if it did, then the DT parsing could wouldn't be under CONFIG_MEDIA_CONTROLLER.
>>
>> It should really be under CONFIG_OF since it is (mostly) unrelated to the MC.
>>
>> But we're missing support for this scenario. For USB/PCI boards we have
>> card descriptions whose information is used in s_routing, for MC-devices
>> we leave it up to the user to set the routing (tvp5150_link_setup). But
>> we don't have anything for a non-MC device that use the device tree.
>>
>> All the information is there, but we're missing infrastructure to
>> give the connector information to the main V4L2 driver so it can implement
>> the input ioctls, and to tell the subdev driver how to program the mux.
>
> That's the bit that I was stumbling over - there is a bit of
> infrastructure missing.
>
> So I'm reading that as the adv driver is incorrect in that it is just
> exposing all the potential input configurations. It really needs the
> DT connectors bit adding to refine the input selection down to the
> actually available connectors on the physical board.
> In my eval board case, DT should describe input connectors for 4
> inputs, corresponding to CVBS_AIN1, CVBS_AIN2, DIFF_CVBS_AIN3_AIN4,
> and DIFF_CVBS_AIN7_AIN8. The fact that I could externally connect
> adapters to combine AIN1 and AIN2 to become s-video isn't relevant (or
> at least secondary).
>
> If we have a bit of infrastructure missing, what is the correct way
> forward for this driver right now?
> I was comparing against the am437x-vfpe, davinci/vpif_capture, and
> blackfin/bfin_capture drivers. All of them in some shape or form take
> VIDIOC_S_INPUT and end up calling s_routing. It may be incorrect, but
> that is how several platforms are using it. Is it acceptable to adopt
> this incorrect behaviour until the infrastructure changes are all
> done?
>
> As a relative mainline kernel newbie I'm slightly reluctant to
> volunteer to implement the missing infrastructure, but with some
> guidance in advance I'm willing to put together a patchset for
> discussion, and adapt the adv driver to use DT connectors.
>
> Then again the dtbindings for connectors in tvp5150 got reverted
> although the driver didn't:
> 31e717d [media] Revert "[media] tvp5150: document input connectors DT bindings"
> "There are still ongoing discussions about how the input connectors
> will be supported by the Media Controller framework so until that
> is settled, it is better to revert the connectors portion of the
> bindings to avoid known to be broken bindings docs to hit mainline."
>
> Did things ever get settled [1], or did it slip through the cracks?
> There don't appear to be any input connector bindings described
> anywhere I can find them.
> This sounds like a topic to be discussed in a new thread rather than
> hidden within a patch review.
This basically ran out of steam. Lack of time and resources prevented this
from going forward.
Do you *need* to have support for the adv in the first version of this
driver? Basically for drivers like this we have good support for sensors,
and we can handle video receiver devices as long as there is no need to
call s_routing.
Why not get that done first?
>
> [1] http://www.spinics.net/lists/linux-media/msg97792.html
>
>>>
>>> You also say above that enum/s/g_input is all about switching between
>>> physical connectors, and that's what I'm doing. I'm now getting lost
>>> as to what is intended
>>
>> Physical connectors as in connectors that users related to: Composite
>> inputs, S-Video, HDMI, etc. Not pins on a chip. How those connectors
>> are routed to pins on a chip is something that differs per board, so
>> that information belongs in the device tree.
>>
>> I hope this clarifies it a bit.
>
> The waters are still a little murky, but getting clearer. Thanks for
> taking the time to try and clarify it.
>
> I've been distracted by other things today, and combined with these
> ongoing discissions I'm afraid V2 is going to be delayed until Monday
> or Tuesday. Sorry about that.
No problem.
Regards,
Hans
On 16 June 2017 at 17:08, Hans Verkuil <hverkuil@xs4all.nl> wrote:
> On 06/16/2017 05:55 PM, Dave Stevenson wrote:
>>
>> On 16 June 2017 at 15:05, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>
>>> On 06/15/17 17:11, Dave Stevenson wrote:
>>>>
>>>> On 15 June 2017 at 15:14, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>>>
>>>>> On 06/15/17 15:38, Dave Stevenson wrote:
>>>>>>
>>>>>> Hi Hans.
>>>>>>
>>>>>> "On 15 June 2017 at 08:12, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>>>>>>>
>>>>>>> Hi Dave,
>>>>>>>
>>>>>>> Here is a quick review of this driver. Once a v2 is posted I'll do a
>>>>>>> more
>>>>>>> thorough
>>>>>>> check.
>>>>>>
>>>>>>
>>>>>> Thank you. I wasn't expecting such a quick response.
>>>>>>
>>>>>>> On 06/14/2017 05:15 PM, Dave Stevenson wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>> Add driver for the Unicam camera receiver block on
>>>>>>>> BCM283x processors.
>>>>>>>>
>>>>>>>> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
>>>>>>>> ---
>>>>>>>> drivers/media/platform/Kconfig | 1 +
>>>>>>>> drivers/media/platform/Makefile | 2 +
>>>>>>>> drivers/media/platform/bcm2835/Kconfig | 14 +
>>>>>>>> drivers/media/platform/bcm2835/Makefile | 3 +
>>>>>>>> drivers/media/platform/bcm2835/bcm2835-unicam.c | 2100
>>>>>>>> ++++++++++++++++++++++
>>>>>>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h | 257 +++
>>>>>>>> 6 files changed, 2377 insertions(+)
>>>>>>>> create mode 100644 drivers/media/platform/bcm2835/Kconfig
>>>>>>>> create mode 100644 drivers/media/platform/bcm2835/Makefile
>>>>>>>> create mode 100644
>>>>>>>> drivers/media/platform/bcm2835/bcm2835-unicam.c
>>>>>>>> create mode 100644
>>>>>>>> drivers/media/platform/bcm2835/vc4-regs-unicam.h
>>>>>>>>
>>>>>>>> +static int unicam_s_input(struct file *file, void *priv, unsigned
>>>>>>>> int i)
>>>>>>>> +{
>>>>>>>> + struct unicam_device *dev = video_drvdata(file);
>>>>>>>> + int ret;
>>>>>>>> +
>>>>>>>> + if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
>>>>>>>> + ret = v4l2_subdev_call(dev->sensor, video,
>>>>>>>> s_routing, i,
>>>>>>>> 0, 0);
>>>>>>>> + else
>>>>>>>> + ret = -EINVAL; /* v4l2-compliance insists on
>>>>>>>> -EINVAL */
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drop this if-else entirely. s_routing makes really no sense when
>>>>>>> using a
>>>>>>> device
>>>>>>> tree. In this particular case there really is just one input, period.
>>>>>>
>>>>>>
>>>>>> I added this due to the ADV7282-M analogue to CSI bridge chip (uses
>>>>>> adv7180.c driver). It uses s_routing to select the physical input /
>>>>>> input type.
>>>>>> If this is dropped, what is the correct mechanism for selecting the
>>>>>> input? Unless I've missed it, s_routing is not a call that is exposed
>>>>>> to userspace, so we're stuck with composite input 1.
>>>>>>
>>>>>> I had asked this question in previously [1], and whilst Sakari had
>>>>>> kindly replied with "s_routing() video op as it stands now is awful, I
>>>>>> hope no-one uses it", the fact is that it is used.
>>>>>>
>>>>>> [1] http://www.spinics.net/lists/linux-media/msg115550.html
>>>>>
>>>>>
>>>>> s_routing was developed for USB and PCI(e) devices and predates the
>>>>> device tree.
>>>>> Basically USB and PCI drivers will have card definitions where USB/PCI
>>>>> card IDs
>>>>> are mapped to card descriptions, and that includes information on the
>>>>> various
>>>>> inputs (composite, S-Video, etc) that are available on the backplane
>>>>> and how those
>>>>> physical connectors are hooked up to the pins on the video ICs.
>>>>>
>>>>> The enum/s/g_input ioctls all show the end-user view, i.e. they
>>>>> enumerate the
>>>>> inputs on the backpanel of the product. The s_routing op was created to
>>>>> map
>>>>> such inputs to actual pins on the ICs.
>>>>>
>>>>> For platform devices we would do this in the device tree today, but
>>>>> some of
>>>>> the necessary bindings are still missing. Specifically those for
>>>>> connectors,
>>>>> AFAIK those are not yet defined. It's been discussed, but never
>>>>> finalized.
>>>>>
>>>>> So if this was done correctly you would use the connector endpoints in
>>>>> the
>>>>> device tree to enumerate the inputs and use how they are connected to
>>>>> the
>>>>> other blocks as the routing information (i.e. pad number).
>>>>>
>>>>> I would say that is the advanced course and to do this later.
>>>>
>>>>
>>>> Certainly the advanced course, but I'm still not seeing how that all
>>>> hangs together.
>>>>
>>>> To me that all sounds like stuff that ought to be within the ADV
>>>> driver? From my perspective as the CSI-2 receiver I only have one
>>>> input.
>>>
>>>
>>> As a csi receiver, yes. But the adv has a mux (or at least the adv7180
>>> does) where it can switch between multiple Composite or S-Video inputs.
>>> s_routing controls the mux.
>>>
>>> But the end-user knows nothing about the internal routing, he only knows
>>> about the connectors on the board. So with VIDIOC_ENUMINPUTS you can
>>> see which inputs there are to choose from with names corresponding to
>>> the labels on the backplane or in the user manual. With VIDIOC_S_INPUT
>>> he can select an input, and the device tree then has to provide the
>>> necessary information on how an input connector is hooked up to the adv.
>>>
>>>> So how does the application select between those inputs?
>>>>
>>>> Having had a bit of a grep I think the tvp5150 driver is doing what
>>>> you're suggesting. However that appears to force you into using the
>>>> media controller API. Is that not overkill particularly from an
>>>> application perspective?
>>>
>>>
>>> Ah, nice. There are actually already connector bindings. I'd forgotten
>>> those went in.
>>>
>>> Anyway, the tvp5150 is used in two situations:
>>>
>>> either as part of the USB non-MC device, or as part of a platform MC
>>> device.
>>>
>>> You have a platform non-MC device. The tvp5150 doesn't support that, but
>>> if it did, then the DT parsing could wouldn't be under
>>> CONFIG_MEDIA_CONTROLLER.
>>>
>>> It should really be under CONFIG_OF since it is (mostly) unrelated to the
>>> MC.
>>>
>>> But we're missing support for this scenario. For USB/PCI boards we have
>>> card descriptions whose information is used in s_routing, for MC-devices
>>> we leave it up to the user to set the routing (tvp5150_link_setup). But
>>> we don't have anything for a non-MC device that use the device tree.
>>>
>>> All the information is there, but we're missing infrastructure to
>>> give the connector information to the main V4L2 driver so it can
>>> implement
>>> the input ioctls, and to tell the subdev driver how to program the mux.
>>
>>
>> That's the bit that I was stumbling over - there is a bit of
>> infrastructure missing.
>>
>> So I'm reading that as the adv driver is incorrect in that it is just
>> exposing all the potential input configurations. It really needs the
>> DT connectors bit adding to refine the input selection down to the
>> actually available connectors on the physical board.
>> In my eval board case, DT should describe input connectors for 4
>> inputs, corresponding to CVBS_AIN1, CVBS_AIN2, DIFF_CVBS_AIN3_AIN4,
>> and DIFF_CVBS_AIN7_AIN8. The fact that I could externally connect
>> adapters to combine AIN1 and AIN2 to become s-video isn't relevant (or
>> at least secondary).
>>
>> If we have a bit of infrastructure missing, what is the correct way
>> forward for this driver right now?
>> I was comparing against the am437x-vfpe, davinci/vpif_capture, and
>> blackfin/bfin_capture drivers. All of them in some shape or form take
>> VIDIOC_S_INPUT and end up calling s_routing. It may be incorrect, but
>> that is how several platforms are using it. Is it acceptable to adopt
>> this incorrect behaviour until the infrastructure changes are all
>> done?
>>
>> As a relative mainline kernel newbie I'm slightly reluctant to
>> volunteer to implement the missing infrastructure, but with some
>> guidance in advance I'm willing to put together a patchset for
>> discussion, and adapt the adv driver to use DT connectors.
>>
>> Then again the dtbindings for connectors in tvp5150 got reverted
>> although the driver didn't:
>> 31e717d [media] Revert "[media] tvp5150: document input connectors DT
>> bindings"
>> "There are still ongoing discussions about how the input connectors
>> will be supported by the Media Controller framework so until that
>> is settled, it is better to revert the connectors portion of the
>> bindings to avoid known to be broken bindings docs to hit mainline."
>>
>> Did things ever get settled [1], or did it slip through the cracks?
>> There don't appear to be any input connector bindings described
>> anywhere I can find them.
>> This sounds like a topic to be discussed in a new thread rather than
>> hidden within a patch review.
>
>
> This basically ran out of steam. Lack of time and resources prevented this
> from going forward.
No problem, I can relate to that.
> Do you *need* to have support for the adv in the first version of this
> driver? Basically for drivers like this we have good support for sensors,
> and we can handle video receiver devices as long as there is no need to
> call s_routing.
>
> Why not get that done first?
I don't *need* to have support for any specific devices at V1, but
obviously I needed something to hook up as a source.
TC358743, OV5647, and ADV7282-M were the devices I had available to
test with, and the first two of those particularly made sense as they
are easily available in a form to connect to the Pi (Auvidea B101/B102
boards, and the V1 Pi camera). The ADV7282 is a nice one to add as it
then gives drivers supporting each of enum/s/g_std,
enum/g/s_dv_timings, and a sensor supporting neither. I was trying to
support the full feature set of each of them.
My issue was that the approach seemingly taken by other existing
drivers wasn't acceptable here. It looks like I'd missed that when
used as platform devices the drivers I'd looked at had routing
information and were doing the mapping required. My bad.
I'll remove the s_routing call for now and add a FIXME detailing the issue.
Thanks for your help and patience over this.
Dave
@@ -135,6 +135,7 @@ source "drivers/media/platform/am437x/Kconfig"
source "drivers/media/platform/xilinx/Kconfig"
source "drivers/media/platform/rcar-vin/Kconfig"
source "drivers/media/platform/atmel/Kconfig"
+source "drivers/media/platform/bcm2835/Kconfig"
config VIDEO_TI_CAL
tristate "TI CAL (Camera Adaptation Layer) driver"
@@ -81,3 +81,5 @@ obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec/
obj-$(CONFIG_VIDEO_MEDIATEK_MDP) += mtk-mdp/
obj-$(CONFIG_VIDEO_MEDIATEK_JPEG) += mtk-jpeg/
+
+obj-y += bcm2835/
new file mode 100644
@@ -0,0 +1,14 @@
+# Broadcom VideoCore4 V4L2 camera support
+
+config VIDEO_BCM2835_UNICAM
+ tristate "Broadcom BCM2835 Unicam video capture driver"
+ depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ depends on ARCH_BCM2708 || ARCH_BCM2709 || ARCH_BCM2835 || COMPILE_TEST
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_FWNODE
+ ---help---
+ Say Y here to enable V4L2 subdevice for CSI2 receiver.
+ This is a V4L2 subdevice that interfaces directly to the VC4 peripheral.
+
+ To compile this driver as a module, choose M here. The module
+ will be called bcm2835-unicam.
new file mode 100644
@@ -0,0 +1,3 @@
+# Makefile for BCM2835 Unicam driver
+
+obj-$(CONFIG_VIDEO_BCM2835_UNICAM) += bcm2835-unicam.o
new file mode 100644
@@ -0,0 +1,2100 @@
+/*
+ * BCM2835 Unicam capture Driver
+ *
+ * Copyright (C) 2017 - Raspberry Pi (Trading) Ltd.
+ *
+ * Dave Stevenson <dave.stevenson@raspberrypi.org>
+ *
+ * Based on TI am437x driver by Benoit Parrot and Lad, Prabhakar and
+ * TI CAL camera interface driver by Benoit Parrot.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "vc4-regs-unicam.h"
+
+#define UNICAM_MODULE_NAME "unicam"
+#define UNICAM_VERSION "0.1.0"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level 0-3");
+
+#define unicam_dbg(level, dev, fmt, arg...) \
+ v4l2_dbg(level, debug, &(dev)->v4l2_dev, fmt, ##arg)
+#define unicam_info(dev, fmt, arg...) \
+ v4l2_info(&(dev)->v4l2_dev, fmt, ##arg)
+#define unicam_err(dev, fmt, arg...) \
+ v4l2_err(&(dev)->v4l2_dev, fmt, ##arg)
+
+/*
+ * Stride is a 16 bit register. Max width is therefore determined by
+ * that divided by the number of bits per pixel. Take 32bpp as a
+ * worst case.
+ * No imposed limit on the height, so adopt a square image for want
+ * of anything better.
+ */
+#define MAX_WIDTH ((65536 / 4) - 1)
+#define MAX_HEIGHT MAX_WIDTH
+
+#define DEFAULT_MAX_DATA_LANES 2
+
+/*
+ * struct unicam_fmt - Unicam media bus format information
+ * @pixelformat: V4L2 pixel format FCC identifier.
+ * @code: V4L2 media bus format code.
+ * @depth: Bits per pixel (when stored in memory).
+ * @csi_dt: CSI data type.
+ */
+struct unicam_fmt {
+ u32 fourcc;
+ u32 code;
+ u8 depth;
+ u8 csi_dt;
+};
+
+/*
+ * The peripheral can unpack and repack between several of
+ * the Bayer raw formats, so any Bayer format can be advertised
+ * as the same Bayer order in each of the supported bit depths.
+ * Use lower case to avoid clashing with V4L2_PIX_FMT_SGBRG8
+ * formats.
+ */
+#define PIX_FMT_ALL_BGGR v4l2_fourcc('b', 'g', 'g', 'r')
+#define PIX_FMT_ALL_RGGB v4l2_fourcc('r', 'g', 'g', 'b')
+#define PIX_FMT_ALL_GBRG v4l2_fourcc('g', 'b', 'r', 'g')
+#define PIX_FMT_ALL_GRBG v4l2_fourcc('g', 'r', 'b', 'g')
+
+static const struct unicam_fmt formats[] = {
+ /* YUV Formats */
+ {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YVYU,
+ .code = MEDIA_BUS_FMT_YVYU8_2X8,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_VYUY,
+ .code = MEDIA_BUS_FMT_VYUY8_2X8,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .code = MEDIA_BUS_FMT_YUYV8_1X16,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YVYU,
+ .code = MEDIA_BUS_FMT_YVYU8_1X16,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ .fourcc = V4L2_PIX_FMT_VYUY,
+ .code = MEDIA_BUS_FMT_VYUY8_1X16,
+ .depth = 16,
+ .csi_dt = 0x1e,
+ }, {
+ /* RGB Formats */
+ .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
+ .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+ .depth = 16,
+ .csi_dt = 0x22,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
+ .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
+ .depth = 16,
+ .csi_dt = 0x22
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
+ .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
+ .depth = 16,
+ .csi_dt = 0x21,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
+ .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
+ .depth = 16,
+ .csi_dt = 0x21,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */
+ .code = MEDIA_BUS_FMT_RGB888_1X24,
+ .depth = 24,
+ .csi_dt = 0x24,
+ }, {
+ .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */
+ .code = MEDIA_BUS_FMT_BGR888_1X24,
+ .depth = 24,
+ .csi_dt = 0x24,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB32, /* argb */
+ .code = MEDIA_BUS_FMT_ARGB8888_1X32,
+ .depth = 32,
+ .csi_dt = 0x0,
+ }, {
+ /* Bayer Formats */
+ .fourcc = PIX_FMT_ALL_BGGR,
+ .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .depth = 8,
+ .csi_dt = 0x2a,
+ }, {
+ .fourcc = PIX_FMT_ALL_GBRG,
+ .code = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .depth = 8,
+ .csi_dt = 0x2a,
+ }, {
+ .fourcc = PIX_FMT_ALL_GRBG,
+ .code = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .depth = 8,
+ .csi_dt = 0x2a,
+ }, {
+ .fourcc = PIX_FMT_ALL_RGGB,
+ .code = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .depth = 8,
+ .csi_dt = 0x2a,
+ }, {
+ .fourcc = PIX_FMT_ALL_BGGR,
+ .code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .depth = 10,
+ .csi_dt = 0x2b,
+ }, {
+ .fourcc = PIX_FMT_ALL_GBRG,
+ .code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .depth = 10,
+ .csi_dt = 0x2b,
+ }, {
+ .fourcc = PIX_FMT_ALL_GRBG,
+ .code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .depth = 10,
+ .csi_dt = 0x2b,
+ }, {
+ .fourcc = PIX_FMT_ALL_RGGB,
+ .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .depth = 10,
+ .csi_dt = 0x2b,
+ }, {
+ .fourcc = PIX_FMT_ALL_BGGR,
+ .code = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_GBRG,
+ .code = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_GRBG,
+ .code = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_RGGB,
+ .code = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_RGGB,
+ .code = MEDIA_BUS_FMT_SRGGB16_1X16,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_GBRG,
+ .code = MEDIA_BUS_FMT_SGBRG16_1X16,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_GBRG,
+ .code = MEDIA_BUS_FMT_SGRBG16_1X16,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ }, {
+ .fourcc = PIX_FMT_ALL_GRBG,
+ .code = MEDIA_BUS_FMT_SGRBG16_1X16,
+ .depth = 12,
+ .csi_dt = 0x2c,
+ },
+};
+
+struct bayer_fmt {
+ u32 fourcc;
+ u8 depth;
+};
+
+const struct bayer_fmt all_bayer_bggr[] = {
+ {V4L2_PIX_FMT_SBGGR8, 8},
+ {V4L2_PIX_FMT_SBGGR10P, 10},
+ {V4L2_PIX_FMT_SBGGR12, 12},
+ {V4L2_PIX_FMT_SBGGR16, 16},
+ {0, 0}
+};
+
+const struct bayer_fmt all_bayer_rggb[] = {
+ {V4L2_PIX_FMT_SRGGB8, 8},
+ {V4L2_PIX_FMT_SRGGB10P, 10},
+ {V4L2_PIX_FMT_SRGGB12, 12},
+ /* V4L2_PIX_FMT_SRGGB16, 16},*/
+ {0, 0}
+};
+
+const struct bayer_fmt all_bayer_gbrg[] = {
+ {V4L2_PIX_FMT_SGBRG8, 8},
+ {V4L2_PIX_FMT_SGBRG10P, 10},
+ {V4L2_PIX_FMT_SGBRG12, 12},
+ /* V4L2_PIX_FMT_SGBRG16, 16}, */
+ {0, 0}
+};
+
+const struct bayer_fmt all_bayer_grbg[] = {
+ {V4L2_PIX_FMT_SGRBG8, 8},
+ {V4L2_PIX_FMT_SGRBG10P, 10},
+ {V4L2_PIX_FMT_SGRBG12, 12},
+ /* V4L2_PIX_FMT_SGRBG16, 16},*/
+ {0, 0}
+};
+
+struct unicam_dmaqueue {
+ struct list_head active;
+};
+
+struct unicam_buffer {
+ struct vb2_v4l2_buffer vb;
+ struct list_head list;
+};
+
+struct unicam_cfg {
+ /* peripheral base address */
+ void __iomem *base;
+ /* clock gating base address */
+ void __iomem *clk_gate_base;
+ unsigned int irq;
+
+ unsigned int periph_max_data_lanes;
+};
+
+#define MAX_POSSIBLE_FMTS \
+ (ARRAY_SIZE(formats) + \
+ ARRAY_SIZE(all_bayer_bggr) + \
+ ARRAY_SIZE(all_bayer_rggb) + \
+ ARRAY_SIZE(all_bayer_grbg) + \
+ ARRAY_SIZE(all_bayer_gbrg))
+
+struct unicam_device {
+ /* V4l2 specific parameters */
+ /* Identifies video device for this channel */
+ struct video_device video_dev;
+ struct v4l2_ctrl_handler ctrl_handler;
+
+ struct v4l2_fwnode_endpoint endpoint;
+
+ struct v4l2_async_subdev asd;
+
+ /* unicam cfg */
+ struct unicam_cfg cfg;
+ /* clock handle */
+ struct clk *clock;
+ /* V4l2 device */
+ struct v4l2_device v4l2_dev;
+ /* parent device */
+ struct platform_device *pdev;
+ /* subdevice async Notifier */
+ struct v4l2_async_notifier notifier;
+ unsigned int sequence;
+
+ /* ptr to sub device */
+ struct v4l2_subdev *sensor;
+ /* Pad config for the sensor */
+ struct v4l2_subdev_pad_config *sensor_config;
+ /* current input at the sub device */
+ int current_input;
+
+ /* Pointer pointing to current v4l2_buffer */
+ struct unicam_buffer *cur_frm;
+ /* Pointer pointing to next v4l2_buffer */
+ struct unicam_buffer *next_frm;
+
+ /* video capture */
+ const struct unicam_fmt *fmt;
+ /* Used to store current pixel format */
+ struct v4l2_format v_fmt;
+ /* Used to store current mbus frame format */
+ struct v4l2_mbus_framefmt m_fmt;
+
+ struct unicam_fmt active_fmts[MAX_POSSIBLE_FMTS];
+ int num_active_fmt;
+ unsigned int virtual_channel;
+ enum v4l2_mbus_type bus_type;
+ unsigned int max_data_lanes;
+ unsigned int active_data_lanes;
+
+ struct v4l2_rect crop;
+
+ /* Currently selected input on subdev */
+ int input;
+
+ /* Buffer queue used in video-buf */
+ struct vb2_queue buffer_queue;
+ /* Queue of filled frames */
+ struct unicam_dmaqueue dma_queue;
+ /* IRQ lock for DMA queue */
+ spinlock_t dma_queue_lock;
+ /* lock used to access this structure */
+ struct mutex lock;
+ /* Flag to denote that we are processing buffers */
+ int streaming;
+};
+
+/* Hardware access */
+#define clk_write(dev, val) writel((val) | 0x5a000000, (dev)->clk_gate_base)
+#define clk_read(dev) readl((dev)->clk_gate_base)
+
+#define reg_read(dev, offset) readl((dev)->base + (offset))
+#define reg_write(dev, offset, val) writel(val, (dev)->base + (offset))
+
+#define reg_read_field(dev, offset, mask) get_field(reg_read((dev), (offset), \
+ mask))
+
+static inline int get_field(u32 value, u32 mask)
+{
+ return (value & mask) >> __ffs(mask);
+}
+
+static inline void set_field(u32 *valp, u32 field, u32 mask)
+{
+ u32 val = *valp;
+
+ val &= ~mask;
+ val |= (field << __ffs(mask)) & mask;
+ *valp = val;
+}
+
+static inline void reg_write_field(struct unicam_cfg *dev, u32 offset,
+ u32 field, u32 mask)
+{
+ u32 val = reg_read((dev), (offset));
+
+ set_field(&val, field, mask);
+ reg_write((dev), (offset), val);
+}
+
+/* Format setup functions */
+
+static int find_depth_by_code(u32 code)
+{
+ const struct unicam_fmt *fmt;
+ unsigned int k;
+
+ for (k = 0; k < ARRAY_SIZE(formats); k++) {
+ fmt = &formats[k];
+ if (fmt->code == code)
+ return fmt->depth;
+ }
+
+ return 0;
+}
+
+static inline int unicam_runtime_get(struct unicam_device *dev)
+{
+ int r;
+
+ r = pm_runtime_get_sync(&dev->pdev->dev);
+
+ return r;
+}
+
+static inline void unicam_runtime_put(struct unicam_device *dev)
+{
+ pm_runtime_put_sync(&dev->pdev->dev);
+}
+
+static const struct unicam_fmt *find_format_by_code(struct unicam_device *dev,
+ u32 code)
+{
+ const struct unicam_fmt *fmt;
+ unsigned int k;
+
+ for (k = 0; k < dev->num_active_fmt; k++) {
+ fmt = &dev->active_fmts[k];
+ if (fmt->code == code)
+ return fmt;
+ }
+
+ return NULL;
+}
+
+static const struct unicam_fmt *find_format_by_pix(struct unicam_device *dev,
+ u32 pixelformat)
+{
+ const struct unicam_fmt *fmt;
+ unsigned int k;
+
+ for (k = 0; k < dev->num_active_fmt; k++) {
+ fmt = &dev->active_fmts[k];
+ if (fmt->fourcc == pixelformat)
+ return fmt;
+ }
+
+ return NULL;
+}
+
+static char *fourcc_to_str(u32 fmt)
+{
+ static char code[5];
+
+ code[0] = (unsigned char)(fmt & 0xff);
+ code[1] = (unsigned char)((fmt >> 8) & 0xff);
+ code[2] = (unsigned char)((fmt >> 16) & 0xff);
+ code[3] = (unsigned char)((fmt >> 24) & 0xff);
+ code[4] = '\0';
+
+ return code;
+}
+
+static void dump_active_formats(struct unicam_device *dev)
+{
+ int i;
+
+ for (i = 0; i < dev->num_active_fmt; i++) {
+ unicam_dbg(3, dev, "active_fmt[%d] (%p) is code %04X, fourcc %s, depth %d\n",
+ i, &dev->active_fmts[i], dev->active_fmts[i].code,
+ fourcc_to_str(dev->active_fmts[i].fourcc),
+ dev->active_fmts[i].depth);
+ }
+}
+
+static inline int bytes_per_line(u32 width, const struct unicam_fmt *fmt)
+{
+ /* Stride must be a multiple of 16. */
+ return ALIGN((width * fmt->depth) >> 3, 16);
+}
+
+static int __subdev_get_format(struct unicam_device *dev,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ struct v4l2_subdev_format sd_fmt = {0};
+ struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
+ int ret;
+
+ sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ sd_fmt.pad = 0;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, get_fmt, dev->sensor_config,
+ &sd_fmt);
+ if (ret < 0)
+ return ret;
+
+ *fmt = *mbus_fmt;
+
+ unicam_dbg(1, dev, "%s %dx%d code:%04X\n", __func__,
+ fmt->width, fmt->height, fmt->code);
+
+ return 0;
+}
+
+static int __subdev_set_format(struct unicam_device *dev,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ struct v4l2_subdev_format sd_fmt;
+ struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
+ int ret;
+
+ sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ sd_fmt.pad = 0;
+ *mbus_fmt = *fmt;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, dev->sensor_config,
+ &sd_fmt);
+ if (ret < 0)
+ return ret;
+
+ unicam_dbg(1, dev, "%s %dx%d code:%04X\n", __func__,
+ fmt->width, fmt->height, fmt->code);
+
+ return 0;
+}
+
+static int unicam_calc_format_size(struct unicam_device *dev,
+ const struct unicam_fmt *fmt,
+ struct v4l2_format *f)
+{
+ int min_bytesperline, min_sizeimage;
+
+ if (!fmt) {
+ unicam_dbg(3, dev, "No unicam_fmt provided!\n");
+ return -EINVAL;
+ }
+
+ v4l_bound_align_image(&f->fmt.pix.width, 16, MAX_WIDTH, 2,
+ &f->fmt.pix.height, 16, MAX_HEIGHT, 0, 0);
+
+ min_bytesperline = bytes_per_line(f->fmt.pix.width, fmt);
+ if (f->fmt.pix.bytesperline > min_bytesperline)
+ f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.bytesperline, 16);
+ else
+ f->fmt.pix.bytesperline = min_bytesperline;
+
+ min_sizeimage = f->fmt.pix.height *
+ f->fmt.pix.bytesperline;
+ if (f->fmt.pix.sizeimage < min_sizeimage)
+ f->fmt.pix.sizeimage = min_sizeimage;
+
+ unicam_dbg(1, dev, "width %d, fmt %s, depth %d\n",
+ f->fmt.pix.width, fourcc_to_str(f->fmt.pix.pixelformat),
+ fmt->depth);
+ unicam_dbg(3, dev, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
+ __func__, fourcc_to_str(f->fmt.pix.pixelformat),
+ f->fmt.pix.width, f->fmt.pix.height,
+ f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
+
+ return 0;
+}
+
+static void unicam_wr_dma_addr(struct unicam_device *dev, unsigned int dmaaddr)
+{
+ unicam_dbg(1, dev, "wr_dma_addr %08X-%08X\n",
+ dmaaddr, dmaaddr + dev->v_fmt.fmt.pix.sizeimage);
+ reg_write(&dev->cfg, UNICAM_IBSA0, dmaaddr);
+ reg_write(&dev->cfg,
+ UNICAM_IBEA0,
+ dmaaddr + dev->v_fmt.fmt.pix.sizeimage);
+ reg_write(&dev->cfg, UNICAM_DBSA0, (uint32_t)dmaaddr);
+ reg_write(&dev->cfg, UNICAM_DBEA0, (uint32_t)dmaaddr + (16 << 10));
+}
+
+static inline void unicam_schedule_next_buffer(struct unicam_device *dev)
+{
+ struct unicam_dmaqueue *dma_q = &dev->dma_queue;
+ struct unicam_buffer *buf;
+ unsigned long addr;
+
+ buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
+ dev->next_frm = buf;
+ list_del(&buf->list);
+
+ addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
+ unicam_wr_dma_addr(dev, addr);
+}
+
+static inline void unicam_process_buffer_complete(struct unicam_device *dev)
+{
+ dev->cur_frm->vb.field = dev->m_fmt.field;
+ dev->cur_frm->vb.sequence = dev->sequence++;
+
+ vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
+ dev->cur_frm = dev->next_frm;
+}
+
+/*
+ * unicam_isr : ISR handler for unicam capture
+ * @irq: irq number
+ * @dev_id: dev_id ptr
+ *
+ * It changes status of the captured buffer, takes next buffer from the queue
+ * and sets its address in unicam registers
+ */
+static irqreturn_t unicam_isr(int irq, void *dev)
+{
+ struct unicam_device *unicam = (struct unicam_device *)dev;
+ int ista, sta;
+ struct unicam_cfg *cfg = &unicam->cfg;
+ struct unicam_dmaqueue *dma_q = &unicam->dma_queue;
+
+ /*
+ * Don't service interrupts if not streaming.
+ * Avoids issues if the VPU should enable the
+ * peripheral without the kernel knowing (that
+ * shouldn't happen, but causes issues if it does).
+ */
+ if (!unicam->streaming)
+ return IRQ_HANDLED;
+
+ sta = reg_read(cfg, UNICAM_STA);
+ /* Write value back to clear the interrupts */
+ reg_write(cfg, UNICAM_STA, sta);
+
+ ista = reg_read(cfg, UNICAM_ISTA);
+ /* Write value back to clear the interrupts */
+ reg_write(cfg, UNICAM_ISTA, ista);
+
+ if (!(sta && (UNICAM_IS | UNICAM_PI0)))
+ return IRQ_HANDLED;
+
+ if (ista & UNICAM_FSI) {
+ /*
+ * Timestamp is to be when the first data byte was captured,
+ * aka frame start.
+ */
+ if (unicam->cur_frm)
+ unicam->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
+ }
+ if (ista & UNICAM_FEI || sta & UNICAM_PI0) {
+ /*
+ * Ensure we have swapped buffers already as we can't
+ * stop the peripheral. Overwrite the frame we've just
+ * captured instead.
+ */
+ if (unicam->cur_frm &&
+ unicam->cur_frm != unicam->next_frm)
+ unicam_process_buffer_complete(unicam);
+ }
+
+ if (ista & (UNICAM_FSI | UNICAM_LCI)) {
+ spin_lock(&unicam->dma_queue_lock);
+ if (!list_empty(&dma_q->active) &&
+ unicam->cur_frm == unicam->next_frm)
+ unicam_schedule_next_buffer(unicam);
+ spin_unlock(&unicam->dma_queue_lock);
+ }
+
+ if (reg_read(&unicam->cfg, UNICAM_ICTL) & UNICAM_FCM) {
+ /* Switch out of trigger mode if selected */
+ reg_write_field(&unicam->cfg, UNICAM_ICTL, 1, UNICAM_TFC);
+ reg_write_field(&unicam->cfg, UNICAM_ICTL, 0, UNICAM_FCM);
+ }
+ return IRQ_HANDLED;
+}
+
+static int unicam_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct unicam_device *dev = video_drvdata(file);
+
+ strlcpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card));
+
+ snprintf(cap->bus_info, sizeof(cap->bus_info),
+ "platform:%s", dev->v4l2_dev.name);
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int unicam_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ const struct unicam_fmt *fmt = NULL;
+
+ if (f->index >= dev->num_active_fmt)
+ return -EINVAL;
+
+ fmt = &dev->active_fmts[f->index];
+
+ f->pixelformat = fmt->fourcc;
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ return 0;
+}
+
+static int unicam_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct unicam_device *dev = video_drvdata(file);
+
+ *f = dev->v_fmt;
+
+ return 0;
+}
+
+static int unicam_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ const struct unicam_fmt *fmt;
+ struct v4l2_subdev_format sd_fmt;
+ struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
+ int ret;
+
+ fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat);
+ if (!fmt) {
+ unicam_dbg(3, dev, "Fourcc format (0x%08x) not found.\n",
+ f->fmt.pix.pixelformat);
+
+ /* Just get the first one enumerated */
+ fmt = &dev->active_fmts[0];
+ f->fmt.pix.pixelformat = fmt->fourcc;
+ }
+
+ sd_fmt.which = V4L2_SUBDEV_FORMAT_TRY;
+ sd_fmt.pad = 0;
+
+ v4l2_fill_mbus_format(mbus_fmt, &f->fmt.pix, fmt->code);
+
+ ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, dev->sensor_config,
+ &sd_fmt);
+ if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ return ret;
+
+ v4l2_fill_pix_format(&f->fmt.pix, &sd_fmt.format);
+
+ /*
+ * Use current colorspace for now, it will get
+ * updated properly during s_fmt
+ */
+ f->fmt.pix.colorspace = dev->v_fmt.fmt.pix.colorspace;
+ return unicam_calc_format_size(dev, fmt, f);
+}
+
+static int unicam_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ struct vb2_queue *q = &dev->buffer_queue;
+ const struct unicam_fmt *fmt;
+ struct v4l2_mbus_framefmt mbus_fmt = {0};
+ int ret;
+
+ if (vb2_is_busy(q)) {
+ unicam_dbg(3, dev, "%s device busy\n", __func__);
+ return -EBUSY;
+ }
+
+ ret = unicam_try_fmt_vid_cap(file, priv, f);
+ if (ret < 0)
+ return ret;
+
+ fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat);
+ dump_active_formats(dev);
+
+ v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, fmt->code);
+
+ ret = __subdev_set_format(dev, &mbus_fmt);
+ if (ret) {
+ unicam_dbg(3, dev,
+ "%s __subdev_set_format failed %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* Just double check nothing has gone wrong */
+ if (mbus_fmt.code != fmt->code) {
+ unicam_dbg(3, dev,
+ "%s subdev changed format on us, this should not happen\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ v4l2_fill_pix_format(&dev->v_fmt.fmt.pix, &mbus_fmt);
+ dev->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ dev->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
+ dev->v_fmt.fmt.pix.bytesperline = f->fmt.pix.bytesperline;
+ dev->v_fmt.fmt.pix.sizeimage = f->fmt.pix.sizeimage;
+ unicam_calc_format_size(dev, fmt, &dev->v_fmt);
+
+ unicam_dbg(3, dev,
+ "%s %dx%d, mbus_fmt %s, V4L2 pix %s. About to overwrite pix with %s\n",
+ __func__,
+ dev->v_fmt.fmt.pix.width,
+ dev->v_fmt.fmt.pix.height,
+ fourcc_to_str(mbus_fmt.code),
+ fourcc_to_str(dev->v_fmt.fmt.pix.pixelformat),
+ fourcc_to_str(fmt->fourcc));
+
+ dev->fmt = fmt;
+ dev->m_fmt = mbus_fmt;
+ *f = dev->v_fmt;
+
+ return 0;
+}
+
+static int unicam_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers,
+ unsigned int *nplanes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct unicam_device *dev = vb2_get_drv_priv(vq);
+ unsigned int size = dev->v_fmt.fmt.pix.sizeimage;
+
+ if (vq->num_buffers + *nbuffers < 3)
+ *nbuffers = 3 - vq->num_buffers;
+
+ if (*nplanes) {
+ if (sizes[0] < size) {
+ unicam_err(dev, "sizes[0] %i < size %u\n",
+ sizes[0], size);
+ return -EINVAL;
+ }
+ size = sizes[0];
+ }
+
+ *nplanes = 1;
+ sizes[0] = size;
+
+ return 0;
+}
+
+static int unicam_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue);
+ struct unicam_buffer *buf = container_of(vb, struct unicam_buffer,
+ vb.vb2_buf);
+ unsigned long size;
+
+ if (WARN_ON(!dev->fmt))
+ return -EINVAL;
+
+ size = dev->v_fmt.fmt.pix.sizeimage;
+ if (vb2_plane_size(vb, 0) < size) {
+ unicam_err(dev, "data will not fit into plane (%lu < %lu)\n",
+ vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
+ return 0;
+}
+
+static void unicam_buffer_queue(struct vb2_buffer *vb)
+{
+ struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue);
+ struct unicam_buffer *buf = container_of(vb, struct unicam_buffer,
+ vb.vb2_buf);
+ struct unicam_dmaqueue *dma_queue = &dev->dma_queue;
+ unsigned long flags = 0;
+
+ /* recheck locking */
+ spin_lock_irqsave(&dev->dma_queue_lock, flags);
+ list_add_tail(&buf->list, &dma_queue->active);
+ spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
+}
+
+static void unicam_wr_dma_config(struct unicam_device *dev,
+ unsigned int stride)
+{
+ reg_write(&dev->cfg, UNICAM_IBLS, stride);
+}
+
+static void unicam_set_packing_config(struct unicam_device *dev)
+{
+ int pack, unpack;
+ u32 val;
+ int mbus_depth = find_depth_by_code(dev->fmt->code);
+ int v4l2_depth = dev->fmt->depth;
+
+ if (mbus_depth == v4l2_depth) {
+ unpack = UNICAM_PUM_NONE;
+ pack = UNICAM_PPM_NONE;
+ } else {
+ switch (mbus_depth) {
+ case 8:
+ unpack = UNICAM_PUM_UNPACK8;
+ break;
+ case 10:
+ unpack = UNICAM_PUM_UNPACK10;
+ break;
+ case 12:
+ unpack = UNICAM_PUM_UNPACK12;
+ break;
+ case 14:
+ unpack = UNICAM_PUM_UNPACK14;
+ break;
+ case 16:
+ unpack = UNICAM_PUM_UNPACK16;
+ break;
+ default:
+ unpack = UNICAM_PUM_NONE;
+ break;
+ }
+ switch (v4l2_depth) {
+ case 8:
+ pack = UNICAM_PPM_PACK8;
+ break;
+ case 10:
+ pack = UNICAM_PPM_PACK10;
+ break;
+ case 12:
+ pack = UNICAM_PPM_PACK12;
+ break;
+ case 14:
+ pack = UNICAM_PPM_PACK14;
+ break;
+ case 16:
+ pack = UNICAM_PPM_PACK16;
+ break;
+ default:
+ pack = UNICAM_PPM_NONE;
+ break;
+ }
+ }
+
+ val = 0;
+ set_field(&val, 2, UNICAM_DEBL_MASK);
+ set_field(&val, unpack, UNICAM_PUM_MASK);
+ set_field(&val, pack, UNICAM_PPM_MASK);
+ reg_write(&dev->cfg, UNICAM_IPIPE, val);
+}
+
+static void unicam_cfg_image_id(struct unicam_device *dev)
+{
+ struct unicam_cfg *cfg = &dev->cfg;
+
+ if (dev->bus_type == V4L2_MBUS_CSI2) {
+ /* CSI2 mode */
+ reg_write(cfg, UNICAM_IDI0,
+ (dev->virtual_channel << 6) |
+ dev->fmt->csi_dt);
+ } else { /* CCP2 mode */
+ reg_write(cfg, UNICAM_IDI0,
+ (0x80 | dev->fmt->csi_dt));
+ }
+}
+
+void unicam_start_rx(struct unicam_device *dev, unsigned long addr)
+{
+ u32 val;
+ unsigned int i;
+ struct unicam_cfg *cfg = &dev->cfg;
+ int line_int_freq = dev->v_fmt.fmt.pix.height >> 2;
+
+ if (line_int_freq < 128)
+ line_int_freq = 128;
+
+ /* Enable lane clocks */
+ val = 1;
+ for (i = 0; i < dev->active_data_lanes; i++)
+ val = val << 2 | 1;
+ clk_write(cfg, val);
+
+ /* Basic init */
+ reg_write(cfg, UNICAM_CTRL, UNICAM_MEM);
+
+ /* Enable analogue control, and leave in reset. */
+ val = UNICAM_AR;
+ set_field(&val, 7, UNICAM_CTATADJ_MASK);
+ set_field(&val, 7, UNICAM_PTATADJ_MASK);
+ reg_write(cfg, UNICAM_ANA, val);
+ usleep_range(1000, 2000);
+
+ /* Come out of reset */
+ reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_AR);
+
+ /* Peripheral reset */
+ reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR);
+ reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR);
+
+ reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE);
+
+ /* Enable Rx control. */
+ val = reg_read(cfg, UNICAM_CTRL);
+ set_field(&val, UNICAM_CPM_CSI2, UNICAM_CPM_MASK);
+ set_field(&val, UNICAM_DCM_STROBE, UNICAM_DCM_MASK);
+ set_field(&val, 0xF, UNICAM_PFT_MASK);
+ set_field(&val, 128, UNICAM_OET_MASK);
+ reg_write(cfg, UNICAM_CTRL, val);
+
+ reg_write(cfg, UNICAM_IHWIN, 0);
+ reg_write(cfg, UNICAM_IVWIN, 0);
+
+ val = reg_read(&dev->cfg, UNICAM_PRI);
+ set_field(&val, 0, UNICAM_BL_MASK);
+ set_field(&val, 0, UNICAM_BS_MASK);
+ set_field(&val, 0xE, UNICAM_PP_MASK);
+ set_field(&val, 8, UNICAM_NP_MASK);
+ set_field(&val, 2, UNICAM_PT_MASK);
+ set_field(&val, 1, UNICAM_PE);
+ reg_write(cfg, UNICAM_PRI, val);
+
+ reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_DDL);
+
+ /* Always start in trigger frame capture mode (UNICAM_FCM set) */
+ val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM;
+ set_field(&val, line_int_freq, UNICAM_LCIE_MASK);
+ reg_write(cfg, UNICAM_ICTL, val);
+ reg_write(cfg, UNICAM_STA, UNICAM_STA_MASK_ALL);
+ reg_write(cfg, UNICAM_ISTA, UNICAM_ISTA_MASK_ALL);
+
+ /* tclk_term_en */
+ reg_write_field(cfg, UNICAM_CLT, 2, UNICAM_CLT1_MASK);
+ /* tclk_settle */
+ reg_write_field(cfg, UNICAM_CLT, 6, UNICAM_CLT2_MASK);
+ /* td_term_en */
+ reg_write_field(cfg, UNICAM_DLT, 2, UNICAM_DLT1_MASK);
+ /* ths_settle */
+ reg_write_field(cfg, UNICAM_DLT, 6, UNICAM_DLT2_MASK);
+ /* trx_enable */
+ reg_write_field(cfg, UNICAM_DLT, 0, UNICAM_DLT3_MASK);
+
+ reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_SOE);
+
+ val = 0;
+ set_field(&val, 1, UNICAM_PCE);
+ set_field(&val, 1, UNICAM_GI);
+ set_field(&val, 1, UNICAM_CPH);
+ set_field(&val, 0, UNICAM_PCVC_MASK);
+ set_field(&val, 1, UNICAM_PCDT_MASK);
+ reg_write(cfg, UNICAM_CMP0, val);
+
+ /* Enable clock lane */
+ val = 0;
+ set_field(&val, 1, UNICAM_CLE);
+ set_field(&val, 1, UNICAM_CLLPE);
+ reg_write(cfg, UNICAM_CLK, val);
+
+ /* Enable required data lanes */
+ val = 0;
+ set_field(&val, 1, UNICAM_DLE);
+ set_field(&val, 1, UNICAM_DLLPE);
+ reg_write(cfg, UNICAM_DAT0, val);
+
+ if (dev->active_data_lanes == 1)
+ val = 0;
+ reg_write(cfg, UNICAM_DAT1, val);
+
+ if (dev->cfg.periph_max_data_lanes > 2) {
+ if (dev->active_data_lanes == 2)
+ val = 0;
+ reg_write(cfg, UNICAM_DAT2, val);
+
+ if (dev->active_data_lanes == 3)
+ val = 0;
+ reg_write(cfg, UNICAM_DAT3, val);
+ }
+
+ unicam_wr_dma_config(dev, dev->v_fmt.fmt.pix.bytesperline);
+ unicam_wr_dma_addr(dev, addr);
+ unicam_set_packing_config(dev);
+ unicam_cfg_image_id(dev);
+
+ val = 0;
+ set_field(&val, 0, UNICAM_EDL_MASK);
+ reg_write(cfg, UNICAM_DCS, val);
+
+ val = reg_read(cfg, UNICAM_MISC);
+ set_field(&val, 1, UNICAM_FL0);
+ set_field(&val, 1, UNICAM_FL1);
+ reg_write(cfg, UNICAM_MISC, val);
+
+ reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPE);
+
+ reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_LIP_MASK);
+
+ reg_write_field(cfg, UNICAM_DCS, 1, UNICAM_LDP);
+
+ /*
+ * Enable trigger only for the first frame to
+ * sync correctly to the FS from the source.
+ */
+ reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_TFC);
+}
+
+static void unicam_disable(struct unicam_device *dev)
+{
+ struct unicam_cfg *cfg = &dev->cfg;
+
+ /* Analogue lane control disable */
+ reg_write_field(cfg, UNICAM_ANA, 1, UNICAM_DDL);
+
+ /* Stop the output engine */
+ reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_SOE);
+
+ /* Disable the data lanes. */
+ reg_write(cfg, UNICAM_DAT0, 0);
+ reg_write(cfg, UNICAM_DAT1, 0);
+
+ if (dev->cfg.periph_max_data_lanes > 2) {
+ reg_write(cfg, UNICAM_DAT2, 0);
+ reg_write(cfg, UNICAM_DAT3, 0);
+ }
+
+ /* Peripheral reset */
+ reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR);
+ usleep_range(50, 100);
+ reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR);
+
+ /* Disable peripheral */
+ reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE);
+
+ /* Disable all lane clocks */
+ clk_write(cfg, 0);
+}
+
+static int unicam_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct unicam_device *dev = vb2_get_drv_priv(vq);
+ struct unicam_dmaqueue *dma_q = &dev->dma_queue;
+ struct unicam_buffer *buf, *tmp;
+ unsigned long addr = 0;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&dev->dma_queue_lock, flags);
+ if (list_empty(&dma_q->active)) {
+ spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
+ unicam_dbg(3, dev, "buffer queue is empty\n");
+ return -EIO;
+ }
+
+ buf = list_entry(dma_q->active.next, struct unicam_buffer, list);
+ dev->cur_frm = buf;
+ dev->next_frm = buf;
+ list_del(&buf->list);
+ spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
+
+ addr = vb2_dma_contig_plane_dma_addr(&dev->cur_frm->vb.vb2_buf, 0);
+ dev->sequence = 0;
+
+ ret = unicam_runtime_get(dev);
+ if (ret < 0) {
+ unicam_dbg(3, dev, "unicam_runtime_get failed\n");
+ goto err_release_buffers;
+ }
+
+ dev->active_data_lanes = dev->max_data_lanes;
+ if (v4l2_subdev_has_op(dev->sensor, video, g_mbus_config)) {
+ struct v4l2_mbus_config mbus_config;
+
+ ret = v4l2_subdev_call(dev->sensor, video, g_mbus_config,
+ &mbus_config);
+ if (ret < 0) {
+ unicam_dbg(3, dev, "g_mbus_config failed\n");
+ goto err_pm_put;
+ }
+
+ switch (mbus_config.flags & V4L2_MBUS_CSI2_LANES) {
+ case V4L2_MBUS_CSI2_1_LANE:
+ dev->active_data_lanes = 1;
+ break;
+ case V4L2_MBUS_CSI2_2_LANE:
+ dev->active_data_lanes = 2;
+ break;
+ case V4L2_MBUS_CSI2_3_LANE:
+ dev->active_data_lanes = 3;
+ break;
+ case V4L2_MBUS_CSI2_4_LANE:
+ dev->active_data_lanes = 4;
+ break;
+ default:
+ unicam_err(dev, "Invalid CSI2 lane flag value - %X\n",
+ mbus_config.flags & V4L2_MBUS_CSI2_LANES);
+ break;
+ }
+ }
+ if (dev->active_data_lanes > dev->cfg.periph_max_data_lanes) {
+ unicam_err(dev, "Device has requested %u data lanes, which is >%u supported by peripheral",
+ dev->active_data_lanes,
+ dev->cfg.periph_max_data_lanes);
+ ret = -EINVAL;
+ goto err_pm_put;
+ }
+
+ unicam_dbg(1, dev, "Running with %u data lanes\n",
+ dev->active_data_lanes);
+
+ ret = clk_set_rate(dev->clock, 100 * 1000 * 1000);
+ if (ret) {
+ unicam_err(dev, "failed to set up clock\n");
+ goto err_pm_put;
+ }
+
+ ret = clk_prepare_enable(dev->clock);
+ if (ret) {
+ unicam_err(dev, "Failed to enable CSI clock: %d\n", ret);
+ goto err_pm_put;
+ }
+ ret = v4l2_subdev_call(dev->sensor, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ unicam_err(dev, "power on failed in subdev\n");
+ goto err_clock_unprepare;
+ }
+ dev->streaming = 1;
+
+ unicam_start_rx(dev, addr);
+
+ ret = v4l2_subdev_call(dev->sensor, video, s_stream, 1);
+ if (ret < 0) {
+ unicam_err(dev, "stream on failed in subdev\n");
+ goto err_disable_unicam;
+ }
+
+ return 0;
+
+err_disable_unicam:
+ unicam_disable(dev);
+ v4l2_subdev_call(dev->sensor, core, s_power, 0);
+err_clock_unprepare:
+ clk_disable_unprepare(dev->clock);
+err_pm_put:
+ unicam_runtime_put(dev);
+err_release_buffers:
+ list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+ }
+ if (dev->cur_frm != dev->next_frm)
+ vb2_buffer_done(&dev->next_frm->vb.vb2_buf,
+ VB2_BUF_STATE_QUEUED);
+ vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+ dev->next_frm = NULL;
+ dev->cur_frm = NULL;
+
+ return ret;
+}
+
+static void unicam_stop_streaming(struct vb2_queue *vq)
+{
+ struct unicam_device *dev = vb2_get_drv_priv(vq);
+ struct unicam_dmaqueue *dma_q = &dev->dma_queue;
+ struct unicam_buffer *buf, *tmp;
+ unsigned long flags;
+
+ if (v4l2_subdev_call(dev->sensor, video, s_stream, 0) < 0)
+ unicam_err(dev, "stream off failed in subdev\n");
+
+ unicam_disable(dev);
+
+ /* Release all active buffers */
+ spin_lock_irqsave(&dev->dma_queue_lock, flags);
+ list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ }
+
+ if (dev->cur_frm == dev->next_frm) {
+ vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ } else {
+ vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ vb2_buffer_done(&dev->next_frm->vb.vb2_buf,
+ VB2_BUF_STATE_ERROR);
+ }
+ dev->cur_frm = NULL;
+ dev->next_frm = NULL;
+ spin_unlock_irqrestore(&dev->dma_queue_lock, flags);
+
+ if (v4l2_subdev_has_op(dev->sensor, core, s_power)) {
+ if (v4l2_subdev_call(dev->sensor, core, s_power, 0) < 0)
+ unicam_err(dev, "power off failed in subdev\n");
+ }
+
+ clk_disable_unprepare(dev->clock);
+ unicam_runtime_put(dev);
+}
+
+static int unicam_enum_input(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ struct unicam_device *dev = video_drvdata(file);
+
+ if (inp->index != 0)
+ return -EINVAL;
+
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ if (v4l2_subdev_has_op(dev->sensor, pad, dv_timings_cap)) {
+ inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
+ inp->std = 0;
+ } else if (v4l2_subdev_has_op(dev->sensor, video, querystd)) {
+ inp->capabilities = V4L2_IN_CAP_STD;
+ inp->std = V4L2_STD_ALL;
+ } else {
+ inp->capabilities = 0;
+ inp->std = 0;
+ }
+ sprintf(inp->name, "Camera 0");
+ return 0;
+}
+
+static int unicam_g_input(struct file *file, void *priv, unsigned int *i)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ *i = dev->input;
+ return 0;
+}
+
+static int unicam_s_input(struct file *file, void *priv, unsigned int i)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ if (v4l2_subdev_has_op(dev->sensor, video, s_routing))
+ ret = v4l2_subdev_call(dev->sensor, video, s_routing, i, 0, 0);
+ else
+ ret = -EINVAL; /* v4l2-compliance insists on -EINVAL */
+
+ /* Must always be able to set input to 0 */
+ if (!i)
+ ret = 0;
+ if (!ret)
+ dev->input = i;
+
+ return ret;
+}
+
+static int unicam_querystd(struct file *file, void *priv,
+ v4l2_std_id *std)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, video, querystd, std);
+ return ret;
+}
+
+static int unicam_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, video, g_std, std);
+ return ret;
+}
+
+static int unicam_s_std(struct file *file, void *priv, v4l2_std_id std)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, video, s_std, std);
+ return ret;
+}
+
+static int unicam_s_edid(struct file *file, void *priv, struct v4l2_edid *edid)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, set_edid, edid);
+
+ return ret;
+}
+
+static int unicam_g_edid(struct file *file, void *priv, struct v4l2_edid *edid)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, get_edid, edid);
+
+ return ret;
+}
+
+static int unicam_g_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, video, g_dv_timings, timings);
+
+ return ret;
+}
+
+static int unicam_s_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, video, s_dv_timings, timings);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+static int unicam_query_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, video, query_dv_timings, timings);
+
+ return ret;
+}
+
+static int unicam_enum_dv_timings(struct file *file, void *priv,
+ struct v4l2_enum_dv_timings *timings)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, enum_dv_timings, timings);
+
+ return ret;
+}
+
+static int unicam_dv_timings_cap(struct file *file, void *priv,
+ struct v4l2_dv_timings_cap *cap)
+{
+ struct unicam_device *dev = video_drvdata(file);
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, dv_timings_cap, cap);
+
+ return ret;
+}
+
+static int unicam_subscribe_event(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_SOURCE_CHANGE:
+ return v4l2_event_subscribe(fh, sub, 4, NULL);
+ }
+
+ return v4l2_ctrl_subscribe_event(fh, sub);
+}
+
+static void unicam_notify(struct v4l2_subdev *sd,
+ unsigned int notification, void *arg)
+{
+ struct unicam_device *dev =
+ container_of(sd->v4l2_dev, struct unicam_device, v4l2_dev);
+
+ switch (notification) {
+ case V4L2_DEVICE_NOTIFY_EVENT:
+ v4l2_event_queue(&dev->video_dev, arg);
+ break;
+ default:
+ break;
+ }
+}
+
+static const struct vb2_ops unicam_video_qops = {
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .queue_setup = unicam_queue_setup,
+ .buf_prepare = unicam_buffer_prepare,
+ .buf_queue = unicam_buffer_queue,
+ .start_streaming = unicam_start_streaming,
+ .stop_streaming = unicam_stop_streaming,
+};
+
+/* unicam capture driver file operations */
+static const struct v4l2_file_operations unicam_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = vb2_fop_mmap,
+};
+
+/* unicam capture ioctl operations */
+static const struct v4l2_ioctl_ops unicam_ioctl_ops = {
+ .vidioc_querycap = unicam_querycap,
+ .vidioc_enum_fmt_vid_cap = unicam_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = unicam_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = unicam_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = unicam_try_fmt_vid_cap,
+
+ .vidioc_enum_input = unicam_enum_input,
+ .vidioc_g_input = unicam_g_input,
+ .vidioc_s_input = unicam_s_input,
+
+ .vidioc_querystd = unicam_querystd,
+ .vidioc_s_std = unicam_s_std,
+ .vidioc_g_std = unicam_g_std,
+
+ .vidioc_g_edid = unicam_g_edid,
+ .vidioc_s_edid = unicam_s_edid,
+
+ .vidioc_s_dv_timings = unicam_s_dv_timings,
+ .vidioc_g_dv_timings = unicam_g_dv_timings,
+ .vidioc_query_dv_timings = unicam_query_dv_timings,
+ .vidioc_enum_dv_timings = unicam_enum_dv_timings,
+ .vidioc_dv_timings_cap = unicam_dv_timings_cap,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = unicam_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static int
+unicam_async_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct unicam_device *unicam = container_of(notifier->v4l2_dev,
+ struct unicam_device, v4l2_dev);
+ struct v4l2_subdev_mbus_code_enum mbus_code;
+ int j;
+ struct unicam_fmt *active_fmt;
+ int ret = 0;
+
+ unicam_dbg(1, unicam, "unicam_async_bound\n");
+
+ if (unicam->sensor) {
+ unicam_info(unicam, "Rejecting subdev %s (Already set!!)",
+ subdev->name);
+ return 0;
+ }
+
+ unicam->sensor = subdev;
+ unicam_dbg(1, unicam, "Using sensor %s for capture\n", subdev->name);
+
+ /* Enumerate sub device formats and enable all matching local formats */
+ unicam->num_active_fmt = 0;
+ active_fmt = &unicam->active_fmts[0];
+ unicam_dbg(2, unicam, "Get supported formats...\n");
+ for (j = 0; ret != -EINVAL && ret != -ENOIOCTLCMD; ++j) {
+ const struct unicam_fmt *fmt = NULL;
+ int k;
+
+ memset(&mbus_code, 0, sizeof(mbus_code));
+ mbus_code.index = j;
+ ret = v4l2_subdev_call(subdev, pad, enum_mbus_code,
+ NULL, &mbus_code);
+ if (ret < 0) {
+ unicam_dbg(2, unicam,
+ "subdev->enum_mbus_code idx %d returned %d - continue\n",
+ j, ret);
+ continue;
+ }
+
+ unicam_dbg(2, unicam,
+ "subdev %s: code: %04x idx: %d\n",
+ subdev->name, mbus_code.code, j);
+
+ for (k = 0; k < ARRAY_SIZE(formats); k++) {
+ if (mbus_code.code == formats[k].code) {
+ fmt = &formats[k];
+ break;
+ }
+ }
+ unicam_dbg(2, unicam, "fmt %04x returned as %p, V4L2 FOURCC %04x, csi_dt %02X\n",
+ mbus_code.code, fmt, fmt ? fmt->fourcc : 0,
+ fmt ? fmt->csi_dt : 0);
+ if (fmt) {
+ const struct bayer_fmt *fmt_list = NULL;
+
+ switch (fmt->fourcc) {
+ case PIX_FMT_ALL_BGGR:
+ fmt_list = all_bayer_bggr;
+ break;
+ case PIX_FMT_ALL_RGGB:
+ fmt_list = all_bayer_rggb;
+ break;
+ case PIX_FMT_ALL_GBRG:
+ fmt_list = all_bayer_gbrg;
+ break;
+ case PIX_FMT_ALL_GRBG:
+ fmt_list = all_bayer_grbg;
+ break;
+ }
+ if (fmt_list) {
+ for (k = 0; fmt_list[k].fourcc; k++) {
+ *active_fmt = *fmt;
+ active_fmt->fourcc = fmt_list[k].fourcc;
+ active_fmt->depth = fmt_list[k].depth;
+ unicam_dbg(2, unicam,
+ "matched fourcc: %s: code: %04x idx: %d\n",
+ fourcc_to_str(fmt->fourcc),
+ fmt->code,
+ unicam->num_active_fmt);
+ unicam->num_active_fmt++;
+ active_fmt++;
+ }
+ } else {
+ *active_fmt = *fmt;
+ unicam_dbg(2, unicam,
+ "matched fourcc: %s: code: %04x idx: %d\n",
+ fourcc_to_str(fmt->fourcc),
+ fmt->code,
+ unicam->num_active_fmt);
+ unicam->num_active_fmt++;
+ active_fmt++;
+ }
+ }
+ }
+ unicam_dbg(2, unicam,
+ "Done all formats\n");
+ dump_active_formats(unicam);
+
+ return 0;
+}
+
+static int unicam_probe_complete(struct unicam_device *unicam)
+{
+ struct video_device *vdev;
+ struct vb2_queue *q;
+ const struct unicam_fmt *fmt;
+ struct v4l2_mbus_framefmt mbus_fmt;
+ int ret;
+
+ v4l2_set_subdev_hostdata(unicam->sensor, unicam);
+
+ unicam->v4l2_dev.notify = unicam_notify;
+
+ unicam->sensor_config = v4l2_subdev_alloc_pad_config(unicam->sensor);
+ if (!unicam->sensor_config)
+ return -ENOMEM;
+
+ ret = __subdev_get_format(unicam, &mbus_fmt);
+ if (ret) {
+ unicam_err(unicam, "Failed to get_format - ret %d\n", ret);
+ return ret;
+ }
+
+ fmt = find_format_by_code(unicam, mbus_fmt.code);
+ if (!fmt) {
+ unicam_dbg(3, unicam, "mbus code format (0x%08x) not found.\n",
+ mbus_fmt.code);
+ return -EINVAL;
+ }
+
+ /* Save current subdev format */
+ v4l2_fill_pix_format(&unicam->v_fmt.fmt.pix, &mbus_fmt);
+ unicam->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ unicam->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
+ unicam->v_fmt.fmt.pix.bytesperline = 0;
+ unicam_calc_format_size(unicam, fmt, &unicam->v_fmt);
+ unicam->fmt = fmt;
+ unicam->m_fmt = mbus_fmt;
+
+ if (v4l2_subdev_has_op(unicam->sensor, video, querystd)) {
+ if (v4l2_subdev_has_op(unicam->sensor, video, g_tvnorms)) {
+ v4l2_std_id tvnorms;
+
+ ret = v4l2_subdev_call(unicam->sensor, video,
+ g_tvnorms, &tvnorms);
+ if (ret) {
+ unicam_dbg(1, unicam, "Sensor supports g_tvnorms, but returned error\n");
+ unicam->video_dev.tvnorms |= V4L2_STD_ALL;
+ } else {
+ unicam->video_dev.tvnorms |= tvnorms;
+ }
+ } else {
+ unicam->video_dev.tvnorms |= V4L2_STD_ALL;
+ }
+ }
+
+ spin_lock_init(&unicam->dma_queue_lock);
+ mutex_init(&unicam->lock);
+
+ /* Add controls from the subdevice */
+ ret = v4l2_ctrl_add_handler(&unicam->ctrl_handler,
+ unicam->sensor->ctrl_handler, NULL);
+ if (ret < 0)
+ return ret;
+
+ q = &unicam->buffer_queue;
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+ q->drv_priv = unicam;
+ q->ops = &unicam_video_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->buf_struct_size = sizeof(struct unicam_buffer);
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->lock = &unicam->lock;
+ q->min_buffers_needed = 2;
+ q->dev = &unicam->pdev->dev;
+
+ ret = vb2_queue_init(q);
+ if (ret) {
+ unicam_err(unicam, "vb2_queue_init() failed\n");
+ return ret;
+ }
+
+ INIT_LIST_HEAD(&unicam->dma_queue.active);
+
+ vdev = &unicam->video_dev;
+ strlcpy(vdev->name, UNICAM_MODULE_NAME, sizeof(vdev->name));
+ vdev->release = video_device_release_empty;
+ vdev->fops = &unicam_fops;
+ vdev->ioctl_ops = &unicam_ioctl_ops;
+ vdev->v4l2_dev = &unicam->v4l2_dev;
+ vdev->vfl_dir = VFL_DIR_RX;
+ vdev->queue = q;
+ vdev->lock = &unicam->lock;
+ vdev->dev_debug = 0xff;
+ video_set_drvdata(vdev, unicam);
+ ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ unicam_err(unicam,
+ "Unable to register video device.\n");
+ return ret;
+ }
+
+ ret = v4l2_device_register_subdev_nodes(&unicam->v4l2_dev);
+ if (ret) {
+ unicam_err(unicam,
+ "Unable to register subdev nodes.\n");
+ video_unregister_device(&unicam->video_dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int unicam_async_complete(struct v4l2_async_notifier *notifier)
+{
+ struct unicam_device *unicam = container_of(notifier->v4l2_dev,
+ struct unicam_device, v4l2_dev);
+
+ return unicam_probe_complete(unicam);
+}
+
+static struct device_node *
+of_get_port(const struct device_node *parent)
+{
+ struct device_node *port = NULL;
+
+ if (!parent)
+ return NULL;
+
+ port = of_get_child_by_name(parent, "port");
+
+ return port;
+}
+
+static struct device_node *
+of_get_next_endpoint(const struct device_node *parent,
+ struct device_node *prev)
+{
+ struct device_node *ep = NULL;
+
+ if (!parent)
+ return NULL;
+
+ do {
+ ep = of_get_next_child(parent, prev);
+ if (!ep)
+ return NULL;
+ prev = ep;
+ } while (of_node_cmp(ep->name, "endpoint") != 0);
+
+ return ep;
+}
+
+static int of_unicam_connect_subdevs(struct unicam_device *dev)
+{
+ struct platform_device *pdev = dev->pdev;
+ struct device_node *parent, *ep_node = NULL, *port = NULL,
+ *remote_ep = NULL, *sensor_node = NULL;
+ struct v4l2_fwnode_endpoint *endpoint;
+ struct v4l2_async_subdev *asd;
+ int ret = -EINVAL;
+ unsigned int lane;
+ struct v4l2_async_subdev **subdevs = NULL;
+
+ parent = pdev->dev.of_node;
+
+ asd = &dev->asd;
+ endpoint = &dev->endpoint;
+
+ dev->cfg.periph_max_data_lanes = DEFAULT_MAX_DATA_LANES;
+ of_property_read_u32(parent, "max_data_lanes",
+ &dev->cfg.periph_max_data_lanes);
+
+ unicam_dbg(3, dev, "Scanning Port node for csi2 port\n");
+ port = of_get_port(parent);
+ if (!port) {
+ unicam_dbg(1, dev, "No port node found for csi2 port\n");
+ goto cleanup_exit;
+ }
+
+ if (!port) {
+ unicam_dbg(1, dev, "No port node matches csi2 port\n");
+ goto cleanup_exit;
+ }
+
+ unicam_dbg(3, dev, "Scanning sub-device for csi2 port\n");
+
+ ep_node = of_get_next_endpoint(port, ep_node);
+ if (!ep_node) {
+ unicam_dbg(3, dev, "can't get next endpoint\n");
+ goto cleanup_exit;
+ }
+
+ unicam_dbg(3, dev, "ep_node is %s\n",
+ ep_node->name);
+
+ sensor_node = of_graph_get_remote_port_parent(ep_node);
+ if (!sensor_node) {
+ unicam_dbg(3, dev, "can't get remote parent\n");
+ goto cleanup_exit;
+ }
+ unicam_dbg(3, dev, "sensor_node is %s\n",
+ sensor_node->name);
+ asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+ asd->match.fwnode.fwnode = of_fwnode_handle(sensor_node);
+
+ remote_ep = of_parse_phandle(ep_node, "remote-endpoint", 0);
+ if (!remote_ep) {
+ unicam_dbg(3, dev, "can't get remote-endpoint\n");
+ goto cleanup_exit;
+ }
+ unicam_dbg(3, dev, "remote_ep is %s\n",
+ remote_ep->name);
+ v4l2_fwnode_endpoint_parse(of_fwnode_handle(remote_ep), endpoint);
+ unicam_dbg(3, dev, "parsed remote_ep to endpoint. nr_of_link_frequencies %u, bus_type %u\n",
+ endpoint->nr_of_link_frequencies, endpoint->bus_type);
+
+ if (endpoint->bus_type != V4L2_MBUS_CSI2) {
+ /* We can support CCP2 too, but no enum defined for that. */
+ unicam_err(dev, "sub-device %s is not a CSI2 device %d\n",
+ sensor_node->name, endpoint->bus_type);
+ goto cleanup_exit;
+ }
+
+ /* Store bus type - CSI2 vs CCP2 */
+ dev->bus_type = endpoint->bus_type;
+ unicam_dbg(3, dev, "bus_type is %d\n", dev->bus_type);
+
+ /* Store Virtual Channel number */
+ dev->virtual_channel = endpoint->base.id;
+
+ /* Store number of data lanes */
+ dev->max_data_lanes = endpoint->bus.mipi_csi2.num_data_lanes;
+
+ if (dev->max_data_lanes > dev->cfg.periph_max_data_lanes) {
+ /* We can support CCP2 too, but no enum defined for that. */
+ unicam_err(dev, "Subdevice %s wants too many data lanes (%u > %u)\n",
+ sensor_node->name, dev->max_data_lanes,
+ dev->cfg.periph_max_data_lanes);
+ goto cleanup_exit;
+ }
+ for (lane = 0; lane < dev->max_data_lanes; lane++) {
+ if (endpoint->bus.mipi_csi2.data_lanes[lane] != lane + 1) {
+ unicam_err(dev, "Subdevice %s - incompatible data lane config\n",
+ sensor_node->name);
+ goto cleanup_exit;
+ }
+ }
+
+ unicam_dbg(3, dev, "v4l2-endpoint: CSI2\n");
+ unicam_dbg(3, dev, "Virtual Channel=%d\n", dev->virtual_channel);
+ unicam_dbg(3, dev, "flags=0x%08x\n", endpoint->bus.mipi_csi2.flags);
+ unicam_dbg(3, dev, "clock_lane=%d\n",
+ endpoint->bus.mipi_csi2.clock_lane);
+ unicam_dbg(3, dev, "num_data_lanes=%d\n",
+ endpoint->bus.mipi_csi2.num_data_lanes);
+ unicam_dbg(3, dev, "data_lanes= <\n");
+ for (lane = 0; lane < endpoint->bus.mipi_csi2.num_data_lanes; lane++)
+ unicam_dbg(3, dev, "\t%u\n",
+ endpoint->bus.mipi_csi2.data_lanes[lane]);
+ unicam_dbg(3, dev, "\t>\n");
+
+ unicam_dbg(1, dev, "found sub-device %s\n",
+ sensor_node->name);
+
+ subdevs = devm_kzalloc(&dev->pdev->dev, sizeof(*subdevs), GFP_KERNEL);
+ if (!subdevs) {
+ ret = -ENOMEM;
+ goto cleanup_exit;
+ }
+ subdevs[0] = asd;
+ dev->notifier.subdevs = subdevs;
+ dev->notifier.num_subdevs = 1;
+ dev->notifier.bound = unicam_async_bound;
+ dev->notifier.complete = unicam_async_complete;
+ ret = v4l2_async_notifier_register(&dev->v4l2_dev,
+ &dev->notifier);
+ if (ret) {
+ unicam_err(dev, "Error registering async notifier - ret %d\n",
+ ret);
+ ret = -EINVAL;
+ }
+
+cleanup_exit:
+ if (remote_ep)
+ of_node_put(remote_ep);
+ if (sensor_node)
+ of_node_put(sensor_node);
+ if (ep_node)
+ of_node_put(ep_node);
+ if (port)
+ of_node_put(port);
+
+ return ret;
+}
+
+/*
+ * unicam_probe : This function creates device entries by register
+ * itself to the V4L2 driver and initializes fields of each
+ * device objects
+ */
+static int unicam_probe(struct platform_device *pdev)
+{
+ struct unicam_cfg *unicam_cfg;
+ struct unicam_device *unicam;
+ struct v4l2_ctrl_handler *hdl;
+ struct resource *res;
+ int ret;
+
+ unicam = devm_kzalloc(&pdev->dev, sizeof(*unicam), GFP_KERNEL);
+ if (!unicam)
+ return -ENOMEM;
+
+ unicam->pdev = pdev;
+ unicam_cfg = &unicam->cfg;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ unicam_cfg->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(unicam_cfg->base)) {
+ unicam_err(unicam, "Failed to get main io block\n");
+ return PTR_ERR(unicam_cfg->base);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ unicam_cfg->clk_gate_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(unicam_cfg->clk_gate_base)) {
+ unicam_err(unicam, "Failed to get 2nd io block\n");
+ return PTR_ERR(unicam_cfg->clk_gate_base);
+ }
+
+ unicam->clock = devm_clk_get(&pdev->dev, "lp_clock");
+ if (IS_ERR(unicam->clock)) {
+ unicam_err(unicam, "Failed to get clock\n");
+ return PTR_ERR(unicam->clock);
+ }
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret <= 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ return -ENODEV;
+ }
+ unicam_cfg->irq = ret;
+
+ ret = devm_request_irq(&pdev->dev, unicam_cfg->irq, unicam_isr, 0,
+ "unicam_capture0", unicam);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to request interrupt\n");
+ return -EINVAL;
+ }
+
+ ret = v4l2_device_register(&pdev->dev, &unicam->v4l2_dev);
+ if (ret) {
+ unicam_err(unicam,
+ "Unable to register v4l2 device.\n");
+ return ret;
+ }
+
+ /* Reserve space for the controls */
+ /*
+ * Currently the subdev with the largest number of controls (13) is
+ * ov6550. So let's pick 16 as a hint for the control handler. Note
+ * that this is a hint only: too large and you waste some memory, too
+ * small and there is a (very) small performance hit when looking up
+ * controls in the internal hash.
+ */
+ hdl = &unicam->ctrl_handler;
+ ret = v4l2_ctrl_handler_init(hdl, 16);
+ if (ret < 0)
+ goto probe_out_v4l2_unregister;
+ unicam->v4l2_dev.ctrl_handler = hdl;
+
+ /* set the driver data in platform device */
+ platform_set_drvdata(pdev, unicam);
+
+ ret = of_unicam_connect_subdevs(unicam);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to connect subdevs\n");
+ goto free_hdl;
+ }
+
+ /* Enabling module functional clock */
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+
+free_hdl:
+ v4l2_ctrl_handler_free(hdl);
+probe_out_v4l2_unregister:
+ v4l2_device_unregister(&unicam->v4l2_dev);
+ return ret;
+}
+
+/*
+ * unicam_remove : It un-register device from V4L2 driver
+ */
+static int unicam_remove(struct platform_device *pdev)
+{
+ struct unicam_device *unicam = platform_get_drvdata(pdev);
+
+ unicam_dbg(2, unicam, "%s\n", __func__);
+
+ pm_runtime_disable(&pdev->dev);
+
+ v4l2_async_notifier_unregister(&unicam->notifier);
+ v4l2_ctrl_handler_free(&unicam->ctrl_handler);
+ v4l2_device_unregister(&unicam->v4l2_dev);
+ video_unregister_device(&unicam->video_dev);
+ if (unicam->sensor_config)
+ v4l2_subdev_free_pad_config(unicam->sensor_config);
+
+ return 0;
+}
+
+static const struct of_device_id unicam_of_match[] = {
+ { .compatible = "brcm,bcm2835-unicam", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, unicam_of_match);
+
+static struct platform_driver unicam_driver = {
+ .probe = unicam_probe,
+ .remove = unicam_remove,
+ .driver = {
+ .name = UNICAM_MODULE_NAME,
+ .of_match_table = of_match_ptr(unicam_of_match),
+ },
+};
+
+module_platform_driver(unicam_driver);
+
+MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.org>");
+MODULE_DESCRIPTION("BCM2835 Unicam driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(UNICAM_VERSION);
new file mode 100644
@@ -0,0 +1,257 @@
+/*
+ * Copyright (C) 2017 Raspberry Pi Trading.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef VC4_REGS_UNICAM_H
+#define VC4_REGS_UNICAM_H
+
+/* The following values are taken from files found within the code drop
+ * made by Broadcom for the BCM21553 Graphics Driver.
+ */
+
+/*
+ * Modified from brcm_usrlib/dag/vmcsx/vcinclude/hardware_vc4.h to
+ * just have the offset, and use the BIT and GENMASK kernel macros.
+ */
+
+#define UNICAM_CTRL 0x000
+#define UNICAM_STA 0x004
+#define UNICAM_ANA 0x008
+#define UNICAM_PRI 0x00c
+#define UNICAM_CLK 0x010
+#define UNICAM_CLT 0x014
+#define UNICAM_DAT0 0x018
+#define UNICAM_DAT1 0x01c
+#define UNICAM_DAT2 0x020
+#define UNICAM_DAT3 0x024
+#define UNICAM_DLT 0x028
+#define UNICAM_CMP0 0x02c
+#define UNICAM_CMP1 0x030
+#define UNICAM_CAP0 0x034
+#define UNICAM_CAP1 0x038
+#define UNICAM_ICTL 0x100
+#define UNICAM_ISTA 0x104
+#define UNICAM_IDI0 0x108
+#define UNICAM_IPIPE 0x10c
+#define UNICAM_IBSA0 0x110
+#define UNICAM_IBEA0 0x114
+#define UNICAM_IBLS 0x118
+#define UNICAM_IBWP 0x11c
+#define UNICAM_IHWIN 0x120
+#define UNICAM_IHSTA 0x124
+#define UNICAM_IVWIN 0x128
+#define UNICAM_IVSTA 0x12c
+#define UNICAM_ICC 0x130
+#define UNICAM_ICS 0x134
+#define UNICAM_IDC 0x138
+#define UNICAM_IDPO 0x13c
+#define UNICAM_IDCA 0x140
+#define UNICAM_IDCD 0x144
+#define UNICAM_IDS 0x148
+#define UNICAM_DCS 0x200
+#define UNICAM_DBSA0 0x204
+#define UNICAM_DBEA0 0x208
+#define UNICAM_DBWP 0x20c
+#define UNICAM_DBCTL 0x300
+#define UNICAM_IBSA1 0x304
+#define UNICAM_IBEA1 0x308
+#define UNICAM_IDI1 0x30c
+#define UNICAM_DBSA1 0x310
+#define UNICAM_DBEA1 0x314
+#define UNICAM_MISC 0x400
+
+/* The following bitmasks are from Broadcom datasheets */
+/* UNICAM_CTRL Register */
+#define UNICAM_CPE BIT(0)
+#define UNICAM_MEM BIT(1)
+#define UNICAM_CPR BIT(2)
+#define UNICAM_CPM_MASK GENMASK(3, 3)
+#define UNICAM_CPM_CSI2 0
+#define UNICAM_CPM_CCP2 1
+#define UNICAM_SOE BIT(4)
+#define UNICAM_DCM_MASK GENMASK(5, 5)
+#define UNICAM_DCM_STROBE 0
+#define UNICAM_DCM_DATA 1
+#define UNICAM_SLS BIT(6)
+#define UNICAM_PFT_MASK GENMASK(11, 8)
+#define UNICAM_OET_MASK GENMASK(20, 12)
+
+/* UNICAM_STA Register */
+#define UNICAM_SYN BIT(0)
+#define UNICAM_CS BIT(1)
+#define UNICAM_SBE BIT(2)
+#define UNICAM_PBE BIT(3)
+#define UNICAM_HOE BIT(4)
+#define UNICAM_PLE BIT(5)
+#define UNICAM_SSC BIT(6)
+#define UNICAM_CRCE BIT(7)
+#define UNICAM_OES BIT(8)
+#define UNICAM_IFO BIT(9)
+#define UNICAM_OFO BIT(10)
+#define UNICAM_BFO BIT(11)
+#define UNICAM_DL BIT(12)
+#define UNICAM_PS BIT(13)
+#define UNICAM_IS BIT(14)
+#define UNICAM_PI0 BIT(15)
+#define UNICAM_PI1 BIT(16)
+#define UNICAM_FSI_S BIT(17)
+#define UNICAM_FEI_S BIT(18)
+#define UNICAM_LCI_S BIT(19)
+#define UNICAM_BUF0_RDY BIT(20)
+#define UNICAM_BUF0_NO BIT(21)
+#define UNICAM_BUF1_RDY BIT(22)
+#define UNICAM_BUF1_NO BIT(23)
+#define UNICAM_DI BIT(24)
+
+#define UNICAM_STA_MASK_ALL \
+ (UNICAM_DL + \
+ UNICAM_SBE + \
+ UNICAM_PBE + \
+ UNICAM_HOE + \
+ UNICAM_PLE + \
+ UNICAM_SSC + \
+ UNICAM_CRCE + \
+ UNICAM_IFO + \
+ UNICAM_OFO + \
+ UNICAM_PS + \
+ UNICAM_PI0 + \
+ UNICAM_PI1)
+
+/* UNICAM_ANA Register */
+#define UNICAM_APD BIT(0)
+#define UNICAM_BPD BIT(1)
+#define UNICAM_AR BIT(2)
+#define UNICAM_DDL BIT(3)
+#define UNICAM_CTATADJ_MASK GENMASK(7, 4)
+#define UNICAM_PTATADJ_MASK GENMASK(11, 8)
+
+/* UNICAM_PRI Register */
+#define UNICAM_PE BIT(0)
+#define UNICAM_PT_MASK GENMASK(2, 1)
+#define UNICAM_NP_MASK GENMASK(7, 4)
+#define UNICAM_PP_MASK GENMASK(11, 8)
+#define UNICAM_BS_MASK GENMASK(15, 12)
+#define UNICAM_BL_MASK GENMASK(17, 16)
+
+/* UNICAM_CLK Register */
+#define UNICAM_CLE BIT(0)
+#define UNICAM_CLPD BIT(1)
+#define UNICAM_CLLPE BIT(2)
+#define UNICAM_CLHSE BIT(3)
+#define UNICAM_CLTRE BIT(4)
+#define UNICAM_CLAC_MASK GENMASK(8, 5)
+#define UNICAM_CLSTE BIT(29)
+
+/* UNICAM_CLT Register */
+#define UNICAM_CLT1_MASK GENMASK(7, 0)
+#define UNICAM_CLT2_MASK GENMASK(15, 8)
+
+/* UNICAM_DATn Registers */
+#define UNICAM_DLE BIT(0)
+#define UNICAM_DLPD BIT(1)
+#define UNICAM_DLLPE BIT(2)
+#define UNICAM_DLHSE BIT(3)
+#define UNICAM_DLTRE BIT(4)
+#define UNICAM_DLSM BIT(5)
+#define UNICAM_DLFO BIT(28)
+#define UNICAM_DLSTE BIT(29)
+
+#define UNICAM_DAT_MASK_ALL (UNICAM_DLSTE + UNICAM_DLFO)
+
+/* UNICAM_DLT Register */
+#define UNICAM_DLT1_MASK GENMASK(7, 0)
+#define UNICAM_DLT2_MASK GENMASK(15, 8)
+#define UNICAM_DLT3_MASK GENMASK(23, 16)
+
+/* UNICAM_ICTL Register */
+#define UNICAM_FSIE BIT(0)
+#define UNICAM_FEIE BIT(1)
+#define UNICAM_IBOB BIT(2)
+#define UNICAM_FCM BIT(3)
+#define UNICAM_TFC BIT(4)
+#define UNICAM_LIP_MASK GENMASK(6, 5)
+#define UNICAM_LCIE_MASK GENMASK(28, 16)
+
+/* UNICAM_IDI0/1 Register */
+#define UNICAM_ID0_MASK GENMASK(7, 0)
+#define UNICAM_ID1_MASK GENMASK(15, 8)
+#define UNICAM_ID2_MASK GENMASK(23, 16)
+#define UNICAM_ID3_MASK GENMASK(31, 24)
+
+/* UNICAM_ISTA Register */
+#define UNICAM_FSI BIT(0)
+#define UNICAM_FEI BIT(1)
+#define UNICAM_LCI BIT(2)
+
+#define UNICAM_ISTA_MASK_ALL (UNICAM_FSI + UNICAM_FEI + UNICAM_LCI)
+
+/* UNICAM_IPIPE Register */
+#define UNICAM_PUM_MASK GENMASK(2, 0)
+ /* Unpacking modes */
+ #define UNICAM_PUM_NONE 0
+ #define UNICAM_PUM_UNPACK6 1
+ #define UNICAM_PUM_UNPACK7 2
+ #define UNICAM_PUM_UNPACK8 3
+ #define UNICAM_PUM_UNPACK10 4
+ #define UNICAM_PUM_UNPACK12 5
+ #define UNICAM_PUM_UNPACK14 6
+ #define UNICAM_PUM_UNPACK16 7
+#define UNICAM_DDM_MASK GENMASK(6, 3)
+#define UNICAM_PPM_MASK GENMASK(9, 7)
+ /* Packing modes */
+ #define UNICAM_PPM_NONE 0
+ #define UNICAM_PPM_PACK8 1
+ #define UNICAM_PPM_PACK10 2
+ #define UNICAM_PPM_PACK12 3
+ #define UNICAM_PPM_PACK14 4
+ #define UNICAM_PPM_PACK16 5
+#define UNICAM_DEM_MASK GENMASK(11, 10)
+#define UNICAM_DEBL_MASK GENMASK(14, 12)
+#define UNICAM_ICM_MASK GENMASK(16, 15)
+#define UNICAM_IDM_MASK GENMASK(17, 17)
+
+/* UNICAM_ICC Register */
+#define UNICAM_ICFL_MASK GENMASK(4, 0)
+#define UNICAM_ICFH_MASK GENMASK(9, 5)
+#define UNICAM_ICST_MASK GENMASK(12, 10)
+#define UNICAM_ICLT_MASK GENMASK(15, 13)
+#define UNICAM_ICLL_MASK GENMASK(31, 16)
+
+/* UNICAM_DCS Register */
+#define UNICAM_DIE BIT(0)
+#define UNICAM_DIM BIT(1)
+#define UNICAM_DBOB BIT(3)
+#define UNICAM_FDE BIT(4)
+#define UNICAM_LDP BIT(5)
+#define UNICAM_EDL_MASK GENMASK(15, 8)
+
+/* UNICAM_DBCTL Register */
+#define UNICAM_DBEN BIT(0)
+#define UNICAM_BUF0_IE BIT(1)
+#define UNICAM_BUF1_IE BIT(2)
+
+/* UNICAM_CMP[0,1] register */
+#define UNICAM_PCE BIT(31)
+#define UNICAM_GI BIT(9)
+#define UNICAM_CPH BIT(8)
+#define UNICAM_PCVC_MASK GENMASK(7, 6)
+#define UNICAM_PCDT_MASK GENMASK(5, 0)
+
+/* UNICAM_MISC register */
+#define UNICAM_FL0 BIT(6)
+#define UNICAM_FL1 BIT(9)
+
+#endif