Hi Javier,
Good to see non Samsung device using v4l2 mem-to-mem framework. What is your
experience, have you encountered any specific problems with it ?
And just out of curiosity, are you planning to develop video codec driver
in v4l2 for i.MX27 as well ?
I have a few comments, please see below...
On 11/16/2011 05:23 PM, Javier Martin wrote:
> i.MX2x SoCs have a PrP which is capable of resizing and format
> conversion of video frames. This driver provides support for
> resizing and format conversion from YUYV to YUV420.
>
> This operation is of the utmost importance since some of these
> SoCs like i.MX27 include an H.264 video codec which only
> accepts YUV420 as input.
>
> Signed-off-by: Javier Martin<javier.martin@vista-silicon.com>
> ---
> arch/arm/mach-imx/devices-imx27.h | 2 +
> arch/arm/plat-mxc/devices/platform-mx2-camera.c | 33 +
> arch/arm/plat-mxc/include/mach/devices-common.h | 2 +
> drivers/media/video/Kconfig | 11 +
> drivers/media/video/Makefile | 2 +
> drivers/media/video/mx2_emmaprp.c | 1059 +++++++++++++++++++++++
> 6 files changed, 1109 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/video/mx2_emmaprp.c
>
> diff --git a/arch/arm/mach-imx/devices-imx27.h b/arch/arm/mach-imx/devices-imx27.h
> index 2f727d7..519aa36 100644
> --- a/arch/arm/mach-imx/devices-imx27.h
> +++ b/arch/arm/mach-imx/devices-imx27.h
> @@ -50,6 +50,8 @@ extern const struct imx_imx_uart_1irq_data imx27_imx_uart_data[];
> extern const struct imx_mx2_camera_data imx27_mx2_camera_data;
> #define imx27_add_mx2_camera(pdata) \
> imx_add_mx2_camera(&imx27_mx2_camera_data, pdata)
> +#define imx27_alloc_mx2_emmaprp(pdata) \
> + imx_alloc_mx2_emmaprp(&imx27_mx2_camera_data)
>
> extern const struct imx_mxc_ehci_data imx27_mxc_ehci_otg_data;
> #define imx27_add_mxc_ehci_otg(pdata) \
> diff --git a/arch/arm/plat-mxc/devices/platform-mx2-camera.c b/arch/arm/plat-mxc/devices/platform-mx2-camera.c
> index b3f4828..4a8bd73 100644
> --- a/arch/arm/plat-mxc/devices/platform-mx2-camera.c
> +++ b/arch/arm/plat-mxc/devices/platform-mx2-camera.c
> @@ -6,6 +6,7 @@
> * the terms of the GNU General Public License version 2 as published by the
> * Free Software Foundation.
> */
> +#include<linux/dma-mapping.h>
> #include<mach/hardware.h>
> #include<mach/devices-common.h>
>
> @@ -62,3 +63,35 @@ struct platform_device *__init imx_add_mx2_camera(
> res, data->iobaseemmaprp ? 4 : 2,
> pdata, sizeof(*pdata), DMA_BIT_MASK(32));
> }
> +
> +struct platform_device *__init imx_alloc_mx2_emmaprp(
> + const struct imx_mx2_camera_data *data)
> +{
> + struct resource res[] = {
> + {
> + .start = data->iobaseemmaprp,
> + .end = data->iobaseemmaprp + data->iosizeemmaprp - 1,
> + .flags = IORESOURCE_MEM,
> + }, {
> + .start = data->irqemmaprp,
> + .end = data->irqemmaprp,
> + .flags = IORESOURCE_IRQ,
> + },
> + };
> + struct platform_device *pdev;
> + int ret = -ENOMEM;
> +
> + pdev = platform_device_alloc("m2m-emmaprp", 0);
> + if (!pdev)
> + goto err;
> +
> + ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
> + if (ret)
> + goto err;
> +
> + return pdev;
> +err:
> + platform_device_put(pdev);
> + return ERR_PTR(-ENODEV);
> +
> +}
> diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
> index def9ba5..ce64bd5 100644
> --- a/arch/arm/plat-mxc/include/mach/devices-common.h
> +++ b/arch/arm/plat-mxc/include/mach/devices-common.h
> @@ -223,6 +223,8 @@ struct imx_mx2_camera_data {
> struct platform_device *__init imx_add_mx2_camera(
> const struct imx_mx2_camera_data *data,
> const struct mx2_camera_platform_data *pdata);
> +struct platform_device *__init imx_alloc_mx2_emmaprp(
> + const struct imx_mx2_camera_data *data);
>
> #include<mach/mxc_ehci.h>
> struct imx_mxc_ehci_data {
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index b303a3f..6e57825 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -1107,4 +1107,15 @@ config VIDEO_SAMSUNG_S5P_MFC
> help
> MFC 5.1 driver for V4L2.
>
> +config VIDEO_MX2_EMMAPRP
> + tristate "MX2 eMMa-PrP support"
> + depends on VIDEO_DEV&& VIDEO_V4L2&& MACH_MX27
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_MEM2MEM_DEV
> + default n
The default is 'n' so this line is redundant.
> + help
> + MX2X chips have a PrP that can be used to process buffers from
> + memory to memory. Operations include resizing and format
> + conversion.
> +
> endif # V4L_MEM2MEM_DRIVERS
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index 117f9c4..7ae711e 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -176,6 +176,8 @@ obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
> obj-$(CONFIG_VIDEO_OMAP1) += omap1_camera.o
> obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
>
> +obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o
> +
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV) += s5p-tv/
> diff --git a/drivers/media/video/mx2_emmaprp.c b/drivers/media/video/mx2_emmaprp.c
> new file mode 100644
> index 0000000..ad65e90
> --- /dev/null
> +++ b/drivers/media/video/mx2_emmaprp.c
> @@ -0,0 +1,1059 @@
> +/*
> + * Support eMMa-PrP through mem2mem framework.
> + *
> + * eMMa-PrP is a piece of HW that allows fetching buffers
> + * from one memory location and do several operations on
> + * them such as scaling or format conversion giving, as a result
> + * a new processed buffer in another memory location.
> + *
> + * Based on mem2mem_testdev.c by Pawel Osciak.
> + *
> + * Copyright (c) 2011 Vista Silicon S.L.
> + * Javier Martin<javier.martin@vista-silicon.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version
> + */
> +#include<linux/module.h>
> +#include<linux/clk.h>
> +#include<linux/slab.h>
> +#include<linux/interrupt.h>
> +
> +#include<linux/platform_device.h>
> +#include<media/v4l2-mem2mem.h>
> +#include<media/v4l2-device.h>
> +#include<media/v4l2-ioctl.h>
> +#include<media/videobuf2-dma-contig.h>
> +
> +#define MEM2MEM_TEST_MODULE_NAME "mem2mem-emmaprp"
Don't you want to use a name more specific to your device ?..
> +
> +MODULE_DESCRIPTION("mem2mem device which supports eMMa-PrP present in mx2 SoCs");
> +MODULE_AUTHOR("Javier Martin<javier.martin@vista-silicon.com");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION("0.0.1");
> +
> +static bool debug = true;
> +module_param(debug, bool, 0644);
> +
> +#define MIN_W 32
> +#define MIN_H 32
> +#define MAX_W 2040
> +#define MAX_H 2046
> +
> +#define W_ALIGN_MASK_YUV420 0x07 /* multiple of 8 */
> +#define W_ALIGN_MASK_OTHERS 0x03 /* multiple of 4 */
> +#define H_ALIGN_MASK 0x01 /* multiple of 2 */
> +
> +/* Flags that indicate a format can be used for capture/output */
> +#define MEM2MEM_CAPTURE (1<< 0)
> +#define MEM2MEM_OUTPUT (1<< 1)
> +
> +#define MEM2MEM_NAME "m2m-emmaprp"
> +
> +/* In bytes, per queue */
> +#define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
SZ_1M could also be used here, but you may as well don't like it;)
> +
> +#define dprintk(dev, fmt, arg...) \
> + v4l2_dbg(1, debug,&dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
> +
> +/* EMMA PrP */
> +#define PRP_CNTL 0x00
...
> +#define PRP_INTR_ST_CH2OVF (1<< 8)
> +
> +struct emmaprp_fmt {
> + char *name;
> + u32 fourcc;
> + /* Types the format can be used for */
> + u32 types;
> +};
> +
> +static struct emmaprp_fmt formats[] = {
> + {
> + .name = "YUV 4:2:0 Planar",
> + .fourcc = V4L2_PIX_FMT_YUV420,
> + .types = MEM2MEM_CAPTURE,
> + },
> + {
> + .name = "4:2:2, packed, YUYV",
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .types = MEM2MEM_OUTPUT,
> + },
> +};
> +
> +/* Per-queue, driver-specific private data */
> +struct emmaprp_q_data {
> + unsigned int width;
> + unsigned int height;
> + unsigned int sizeimage;
> + struct emmaprp_fmt *fmt;
> +};
> +
> +enum {
> + V4L2_M2M_SRC = 0,
> + V4L2_M2M_DST = 1,
> +};
> +
> +/* Source and destination queue data */
> +static struct emmaprp_q_data q_data[2];
Isn't it possible to embed this data into struct emmaprp_ctx ?
struct emmaprp_ctx object is available anywhere where get_q_data() is used.
And that would have to be changed anyway in case there are multiple instances
of a device this driver binds to.
> +
> +static struct emmaprp_q_data *get_q_data(enum v4l2_buf_type type)
> +{
> + switch (type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + return&q_data[V4L2_M2M_SRC];
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + return&q_data[V4L2_M2M_DST];
> + default:
> + BUG();
> + }
> + return NULL;
> +}
> +
> +#define NUM_FORMATS ARRAY_SIZE(formats)
> +
> +static struct emmaprp_fmt *find_format(struct v4l2_format *f)
> +{
> + struct emmaprp_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k< NUM_FORMATS; k++) {
> + fmt =&formats[k];
> + if (fmt->fourcc == f->fmt.pix.pixelformat)
> + break;
> + }
> +
> + if (k == NUM_FORMATS)
> + return NULL;
> +
> + return&formats[k];
> +}
> +
> +struct emmaprp_dev {
> + struct v4l2_device v4l2_dev;
> + struct video_device *vfd;
> +
> + atomic_t busy;
> + struct mutex dev_mutex;
> + spinlock_t irqlock;
> +
> + int irq_emma;
> + void __iomem *base_emma;
> + struct clk *clk_emma;
> + struct resource *res_emma;
> +
> + struct v4l2_m2m_dev *m2m_dev;
> + struct vb2_alloc_ctx *alloc_ctx;
> +};
> +
> +struct emmaprp_ctx {
> + struct emmaprp_dev *dev;
> +
> + /* Abort requested by m2m */
> + int aborting;
> +
> + struct v4l2_m2m_ctx *m2m_ctx;
> +};
> +
> +/*
> + * mem2mem callbacks
> + */
> +static int emmaprp_job_ready(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> +
> + if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx)> 0)
> + && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx)> 0)
> + && (atomic_read(&pcdev->busy) == 0))
> + return 1;
> +
> + dprintk(pcdev, "Task not ready to run\n");
> +
> + return 0;
> +}
It looks like only one buffer on each queue is needed for single device_run(),
i.e. you H/W doesn't need more than 2 buffers for processing. In this case
job_ready callback may be left unimplemented and you can remove the 'busy' variable
altogether.
Here is description of the job_ready callback, from include/media/v4l2-mem2mem.h:
* @job_ready: optional. Should return 0 if the driver does not have a job
* fully prepared to run yet (i.e. it will not be able to finish a
* transaction without sleeping). If not provided, it will be
* assumed that one source and one destination buffer are all
* that is required for the driver to perform one full transaction.
* This method may not sleep.
> +
> +static void emmaprp_job_abort(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> +
> + ctx->aborting = 1;
> +
> + dprintk(pcdev, "Aborting task\n");
> +
> + v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
> +}
> +
> +static void emmaprp_lock(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> + mutex_lock(&pcdev->dev_mutex);
> +}
> +
> +static void emmaprp_unlock(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> + mutex_unlock(&pcdev->dev_mutex);
> +}
> +
> +static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
> +{
> + dprintk(pcdev,
> + "eMMa-PrP Registers:\n"
> + " SOURCE_Y_PTR = 0x%08X\n"
> + " SRC_FRAME_SIZE = 0x%08X\n"
> + " DEST_Y_PTR = 0x%08X\n"
> + " DEST_CR_PTR = 0x%08X\n"
> + " DEST_CB_PTR = 0x%08X\n"
> + " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
> + " CNTL = 0x%08X\n",
> + readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
> + readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
> + readl(pcdev->base_emma + PRP_DEST_Y_PTR),
> + readl(pcdev->base_emma + PRP_DEST_CR_PTR),
> + readl(pcdev->base_emma + PRP_DEST_CB_PTR),
> + readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
> + readl(pcdev->base_emma + PRP_CNTL));
> +}
> +
> +static void emmaprp_device_run(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_q_data *s_q_data, *d_q_data;
> + struct vb2_buffer *src_buf, *dst_buf;
> + struct emmaprp_dev *pcdev = ctx->dev;
> + unsigned int s_width, s_height;
> + unsigned int d_width, d_height;
> + unsigned int d_size;
> + u8 *p_in, *p_out;
How about using dma_addr_t instead of (u8 *) ?
> + u32 tmp;
> +
> + atomic_set(&ctx->dev->busy, 1);
> +
> + src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
> +
> + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + s_width = s_q_data->width;
> + s_height = s_q_data->height;
> +
> + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + d_width = d_q_data->width;
> + d_height = d_q_data->height;
> + d_size = d_width * d_height;
> +
> + p_in = (u8 *)vb2_dma_contig_plane_dma_addr(src_buf, 0);
> + p_out = (u8 *)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
> + if (!p_in || !p_out) {
> + v4l2_err(&pcdev->v4l2_dev,
> + "Acquiring kernel pointers to buffers failed\n");
> + return;
> + }
> +
> + /* Input frame parameters */
> + writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
> + writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
> + pcdev->base_emma + PRP_SRC_FRAME_SIZE);
> +
> + /* Output frame parameters */
> + writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
> + writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
> + writel(p_out + d_size + (d_size>> 2),
> + pcdev->base_emma + PRP_DEST_CR_PTR);
> + writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
> + pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
> +
> + /* IRQ configuration */
> + tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
> + writel(tmp | PRP_INTR_RDERR |
> + PRP_INTR_CH2WERR |
> + PRP_INTR_CH2FC,
> + pcdev->base_emma + PRP_INTR_CNTL);
> +
> + emmaprp_dump_regs(pcdev);
> +
> + /* Enable transfer */
> + tmp = readl(pcdev->base_emma + PRP_CNTL);
> + writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
> + PRP_CNTL_DATA_IN_YUV422 |
> + PRP_CNTL_CH2EN,
> + pcdev->base_emma + PRP_CNTL);
> +}
> +
> +static irqreturn_t emmaprp_irq(int irq_emma, void *data)
> +{
> + struct emmaprp_dev *pcdev = (struct emmaprp_dev *)data;
No need for casting.
> + struct emmaprp_ctx *curr_ctx;
> + struct vb2_buffer *src_vb, *dst_vb;
> + unsigned long flags;
> + u32 irqst;
> +
> + /* Check irq flags and clear irq */
> + irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
> + writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
> + dprintk(pcdev, "irqst = 0x%08x\n", irqst);
> +
> + curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
> + if (NULL == curr_ctx) {
> + printk(KERN_ERR
> + "Instance released before the end of transaction\n");
In new drivers, instead if printk(<LEVEL>.. pr_<level>(.. is preferred, i.e.
in this case pr_err().
> + return IRQ_HANDLED;
> + }
> +
> + if (curr_ctx->aborting)
> + goto irq_ok;
> +
> + if ((irqst& PRP_INTR_ST_RDERR) ||
> + (irqst& PRP_INTR_ST_CH2WERR)) {
> + printk(KERN_ERR
> + "PrP bus error ocurred, this transfer is probably corrupted\n");
Ditto.
> + writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
> + goto irq_ok;
> + }
> +
> + if (irqst& PRP_INTR_ST_CH2B1CI) { /* buffer ready */
> + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
> + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
> +
> + spin_lock_irqsave(&pcdev->irqlock, flags);
> + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
> + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
> + spin_unlock_irqrestore(&pcdev->irqlock, flags);
> + goto irq_ok;
> + }
> +
> +irq_ok:
> + atomic_set(&pcdev->busy, 0);
> + v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
> +
> + return IRQ_HANDLED;
> +}
> +
> +/*
> + * video ioctls
> + */
...
> +
> +static int vidioc_try_fmt(struct v4l2_format *f, struct emmaprp_fmt *fmt)
fmt is unused in this function, perhaps this argument can be removed.
> +{
> + enum v4l2_field field;
> +
> + field = f->fmt.pix.field;
> +
> + if (field == V4L2_FIELD_ANY)
> + field = V4L2_FIELD_NONE;
> + else if (V4L2_FIELD_NONE != field)
> + return -EINVAL;
> +
> + /* V4L2 specification suggests the driver corrects the format struct
> + * if any of the dimensions is unsupported */
> + f->fmt.pix.field = field;
> +
> + if (f->fmt.pix.height< MIN_H)
> + f->fmt.pix.height = MIN_H;
> + else if (f->fmt.pix.height> MAX_H)
> + f->fmt.pix.height = MAX_H;
> +
> + if (f->fmt.pix.width< MIN_W)
> + f->fmt.pix.width = MIN_W;
> + else if (f->fmt.pix.width> MAX_W)
> + f->fmt.pix.width = MAX_W;
I would go for a clamp_t here, e.g.
f->fmt.pix.height = clamp_t(u32, f->fmt.pix.height, MIN_H, MAX_H);
f->fmt.pix.width = clamp_t(u32, f->fmt.pix.width, MIN_W, MAX_W);
> +
> + f->fmt.pix.height&= ~H_ALIGN_MASK;
> + if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
> + f->fmt.pix.width&= ~W_ALIGN_MASK_YUV420;
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
> + } else { /* YUYV */
> + f->fmt.pix.width&= ~W_ALIGN_MASK_OTHERS;
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
> + }
> + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
> +
> + return 0;
> +}
> +
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct emmaprp_fmt *fmt;
> + struct emmaprp_ctx *ctx = priv;
> +
> + fmt = find_format(f);
> + if (!fmt || !(fmt->types& MEM2MEM_CAPTURE)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct emmaprp_fmt *fmt;
> + struct emmaprp_ctx *ctx = priv;
> +
> + fmt = find_format(f);
> + if (!fmt || !(fmt->types& MEM2MEM_OUTPUT)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
> +{
> + struct emmaprp_q_data *q_data;
> + struct vb2_queue *vq;
> +
> + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(f->type);
> + if (!q_data)
> + return -EINVAL;
> +
> + if (vb2_is_busy(vq)) {
> + v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
> + return -EBUSY;
> + }
I can't see where the format is adjusted against the device capabilities, perhaps
something like:
ret = vidioc_try_fmt(f, ...
if (ret < 0)
return ret;
would do.
> +
> + q_data->fmt = find_format(f);
> + q_data->width = f->fmt.pix.width;
> + q_data->height = f->fmt.pix.height;
> + if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
> + q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
> + else /* YUYV */
> + q_data->sizeimage = q_data->width * q_data->height * 2;
> +
> + dprintk(ctx->dev,
> + "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
> + f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
> +
> + return 0;
> +}
> +
...
> +/*
> + * File operations
> + */
> +static int emmaprp_open(struct file *file)
> +{
> + struct emmaprp_dev *pcdev = video_drvdata(file);
> + struct emmaprp_ctx *ctx = NULL;
The assignment is unnecessary.
> +
> + ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
> + if (!ctx)
> + return -ENOMEM;
> +
> + file->private_data = ctx;
> + ctx->dev = pcdev;
> +
> + ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx,&queue_init);
> +
> + if (IS_ERR(ctx->m2m_ctx)) {
> + int ret = PTR_ERR(ctx->m2m_ctx);
> +
> + kfree(ctx);
> + return ret;
> + }
> +
> + clk_enable(pcdev->clk_emma);
> +
> + dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
> +
> + return 0;
> +}
> +
...
> +
> +static int emmaprp_probe(struct platform_device *pdev)
> +{
> + struct emmaprp_dev *pcdev;
> + struct video_device *vfd;
> + struct resource *res_emma;
> + int irq_emma;
> + int ret;
> +
> + pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
> + if (!pcdev)
> + return -ENOMEM;
> +
> + spin_lock_init(&pcdev->irqlock);
> +
> + pcdev->clk_emma = clk_get(NULL, "emma");
> + if (IS_ERR(pcdev->clk_emma)) {
> + ret = PTR_ERR(pcdev->clk_emma);
> + goto free_dev;
> + }
> +
> + irq_emma = platform_get_irq(pdev, 0);
> + res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (irq_emma< 0 || res_emma == NULL) {
> + dev_err(&pdev->dev, "Missing platform resources data\n");
> + ret = -ENODEV;
> + goto free_clk;
> + }
> +
> + ret = v4l2_device_register(&pdev->dev,&pcdev->v4l2_dev);
> + if (ret)
> + goto free_clk;
> +
> + atomic_set(&pcdev->busy, 0);
> + mutex_init(&pcdev->dev_mutex);
> +
> + vfd = video_device_alloc();
> + if (!vfd) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
> + ret = -ENOMEM;
> + goto unreg_dev;
> + }
> +
> + *vfd = emmaprp_videodev;
> + vfd->lock =&pcdev->dev_mutex;
> +
> + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
It's to early to register a video device at this point, it should be done
as the last thing, after all needed resources are prepared. Let's imagine
the corresponding /dev/video? is opened by a user process right at this point,
would that work ?
> + if (ret) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
> + goto rel_vdev;
> + }
> +
> + video_set_drvdata(vfd, pcdev);
> + snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
> + pcdev->vfd = vfd;
> + v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
> + " Device registered as /dev/video%d\n", vfd->num);
> +
> + platform_set_drvdata(pdev, pcdev);
> +
> + if (!request_mem_region(res_emma->start, resource_size(res_emma),
> + MEM2MEM_NAME)) {
> + ret = -EBUSY;
> + goto rel_vdev;
> + }
> +
> + pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma));
> + if (!pcdev->base_emma) {
> + ret = -ENOMEM;
> + goto rel_mem;
> + }
> + pcdev->irq_emma = irq_emma;
> + pcdev->res_emma = res_emma;
> +
> + ret = request_irq(pcdev->irq_emma, emmaprp_irq, 0,
> + MEM2MEM_NAME, pcdev);
> + if (ret)
> + goto rel_map;
> +
> +
> + pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> + if (IS_ERR(pcdev->alloc_ctx)) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
> + ret = PTR_ERR(pcdev->alloc_ctx);
> + goto err_ctx;
> + }
> +
> + pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
> + if (IS_ERR(pcdev->m2m_dev)) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
> + ret = PTR_ERR(pcdev->m2m_dev);
> + goto err_m2m;
> + }
> +
> + q_data[V4L2_M2M_SRC].fmt =&formats[1];
> + q_data[V4L2_M2M_DST].fmt =&formats[0];
> +
> + return 0;
> +
> + v4l2_m2m_release(pcdev->m2m_dev);
> +err_m2m:
> + video_unregister_device(pcdev->vfd);
> +err_ctx:
> + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> + free_irq(pcdev->irq_emma, pcdev);
> +rel_map:
> + iounmap(pcdev->base_emma);
> +rel_mem:
> + release_mem_region(res_emma->start, resource_size(res_emma));
> +rel_vdev:
> + video_device_release(vfd);
> +unreg_dev:
> + v4l2_device_unregister(&pcdev->v4l2_dev);
> +free_clk:
> + clk_put(pcdev->clk_emma);
> +free_dev:
> + kfree(pcdev);
> +
> + return ret;
> +}
> +
> +static int emmaprp_remove(struct platform_device *pdev)
> +{
> + struct resource *res_emma;
> + struct emmaprp_dev *pcdev =
> + (struct emmaprp_dev *)platform_get_drvdata(pdev);
No need for type casting here.
> +
> + v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
> + v4l2_m2m_release(pcdev->m2m_dev);
> + free_irq(pcdev->irq_emma, pcdev);
> + iounmap(pcdev->base_emma);
> + res_emma = pcdev->res_emma;
> + release_mem_region(res_emma->start, resource_size(res_emma));
> + video_unregister_device(pcdev->vfd);
You may want to unregister the video device as the first, before freeing
any resources associated with it.
> + v4l2_device_unregister(&pcdev->v4l2_dev);
> + clk_put(pcdev->clk_emma);
> + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> +
> + kfree(pcdev);
> +
> + return 0;
> +}
--
Regards,
Sylwester
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@@ -50,6 +50,8 @@ extern const struct imx_imx_uart_1irq_data imx27_imx_uart_data[];
extern const struct imx_mx2_camera_data imx27_mx2_camera_data;
#define imx27_add_mx2_camera(pdata) \
imx_add_mx2_camera(&imx27_mx2_camera_data, pdata)
+#define imx27_alloc_mx2_emmaprp(pdata) \
+ imx_alloc_mx2_emmaprp(&imx27_mx2_camera_data)
extern const struct imx_mxc_ehci_data imx27_mxc_ehci_otg_data;
#define imx27_add_mxc_ehci_otg(pdata) \
@@ -6,6 +6,7 @@
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
+#include <linux/dma-mapping.h>
#include <mach/hardware.h>
#include <mach/devices-common.h>
@@ -62,3 +63,35 @@ struct platform_device *__init imx_add_mx2_camera(
res, data->iobaseemmaprp ? 4 : 2,
pdata, sizeof(*pdata), DMA_BIT_MASK(32));
}
+
+struct platform_device *__init imx_alloc_mx2_emmaprp(
+ const struct imx_mx2_camera_data *data)
+{
+ struct resource res[] = {
+ {
+ .start = data->iobaseemmaprp,
+ .end = data->iobaseemmaprp + data->iosizeemmaprp - 1,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = data->irqemmaprp,
+ .end = data->irqemmaprp,
+ .flags = IORESOURCE_IRQ,
+ },
+ };
+ struct platform_device *pdev;
+ int ret = -ENOMEM;
+
+ pdev = platform_device_alloc("m2m-emmaprp", 0);
+ if (!pdev)
+ goto err;
+
+ ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+ if (ret)
+ goto err;
+
+ return pdev;
+err:
+ platform_device_put(pdev);
+ return ERR_PTR(-ENODEV);
+
+}
@@ -223,6 +223,8 @@ struct imx_mx2_camera_data {
struct platform_device *__init imx_add_mx2_camera(
const struct imx_mx2_camera_data *data,
const struct mx2_camera_platform_data *pdata);
+struct platform_device *__init imx_alloc_mx2_emmaprp(
+ const struct imx_mx2_camera_data *data);
#include <mach/mxc_ehci.h>
struct imx_mxc_ehci_data {
@@ -1107,4 +1107,15 @@ config VIDEO_SAMSUNG_S5P_MFC
help
MFC 5.1 driver for V4L2.
+config VIDEO_MX2_EMMAPRP
+ tristate "MX2 eMMa-PrP support"
+ depends on VIDEO_DEV && VIDEO_V4L2 && MACH_MX27
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_MEM2MEM_DEV
+ default n
+ help
+ MX2X chips have a PrP that can be used to process buffers from
+ memory to memory. Operations include resizing and format
+ conversion.
+
endif # V4L_MEM2MEM_DRIVERS
@@ -176,6 +176,8 @@ obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
obj-$(CONFIG_VIDEO_OMAP1) += omap1_camera.o
obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
+obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o
+
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV) += s5p-tv/
new file mode 100644
@@ -0,0 +1,1059 @@
+/*
+ * Support eMMa-PrP through mem2mem framework.
+ *
+ * eMMa-PrP is a piece of HW that allows fetching buffers
+ * from one memory location and do several operations on
+ * them such as scaling or format conversion giving, as a result
+ * a new processed buffer in another memory location.
+ *
+ * Based on mem2mem_testdev.c by Pawel Osciak.
+ *
+ * Copyright (c) 2011 Vista Silicon S.L.
+ * Javier Martin <javier.martin@vista-silicon.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+
+#include <linux/platform_device.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#define MEM2MEM_TEST_MODULE_NAME "mem2mem-emmaprp"
+
+MODULE_DESCRIPTION("mem2mem device which supports eMMa-PrP present in mx2 SoCs");
+MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.1");
+
+static bool debug = true;
+module_param(debug, bool, 0644);
+
+#define MIN_W 32
+#define MIN_H 32
+#define MAX_W 2040
+#define MAX_H 2046
+
+#define W_ALIGN_MASK_YUV420 0x07 /* multiple of 8 */
+#define W_ALIGN_MASK_OTHERS 0x03 /* multiple of 4 */
+#define H_ALIGN_MASK 0x01 /* multiple of 2 */
+
+/* Flags that indicate a format can be used for capture/output */
+#define MEM2MEM_CAPTURE (1 << 0)
+#define MEM2MEM_OUTPUT (1 << 1)
+
+#define MEM2MEM_NAME "m2m-emmaprp"
+
+/* In bytes, per queue */
+#define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
+
+#define dprintk(dev, fmt, arg...) \
+ v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
+
+/* EMMA PrP */
+#define PRP_CNTL 0x00
+#define PRP_INTR_CNTL 0x04
+#define PRP_INTRSTATUS 0x08
+#define PRP_SOURCE_Y_PTR 0x0c
+#define PRP_SOURCE_CB_PTR 0x10
+#define PRP_SOURCE_CR_PTR 0x14
+#define PRP_DEST_RGB1_PTR 0x18
+#define PRP_DEST_RGB2_PTR 0x1c
+#define PRP_DEST_Y_PTR 0x20
+#define PRP_DEST_CB_PTR 0x24
+#define PRP_DEST_CR_PTR 0x28
+#define PRP_SRC_FRAME_SIZE 0x2c
+#define PRP_DEST_CH1_LINE_STRIDE 0x30
+#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
+#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
+#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
+#define PRP_CH2_OUT_IMAGE_SIZE 0x40
+#define PRP_SRC_LINE_STRIDE 0x44
+#define PRP_CSC_COEF_012 0x48
+#define PRP_CSC_COEF_345 0x4c
+#define PRP_CSC_COEF_678 0x50
+#define PRP_CH1_RZ_HORI_COEF1 0x54
+#define PRP_CH1_RZ_HORI_COEF2 0x58
+#define PRP_CH1_RZ_HORI_VALID 0x5c
+#define PRP_CH1_RZ_VERT_COEF1 0x60
+#define PRP_CH1_RZ_VERT_COEF2 0x64
+#define PRP_CH1_RZ_VERT_VALID 0x68
+#define PRP_CH2_RZ_HORI_COEF1 0x6c
+#define PRP_CH2_RZ_HORI_COEF2 0x70
+#define PRP_CH2_RZ_HORI_VALID 0x74
+#define PRP_CH2_RZ_VERT_COEF1 0x78
+#define PRP_CH2_RZ_VERT_COEF2 0x7c
+#define PRP_CH2_RZ_VERT_VALID 0x80
+
+#define PRP_CNTL_CH1EN (1 << 0)
+#define PRP_CNTL_CH2EN (1 << 1)
+#define PRP_CNTL_CSIEN (1 << 2)
+#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
+#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
+#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
+#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
+#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
+#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
+#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
+#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
+#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
+#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
+#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
+#define PRP_CNTL_CH1_LEN (1 << 9)
+#define PRP_CNTL_CH2_LEN (1 << 10)
+#define PRP_CNTL_SKIP_FRAME (1 << 11)
+#define PRP_CNTL_SWRST (1 << 12)
+#define PRP_CNTL_CLKEN (1 << 13)
+#define PRP_CNTL_WEN (1 << 14)
+#define PRP_CNTL_CH1BYP (1 << 15)
+#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
+#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
+#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
+#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
+#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
+#define PRP_CNTL_CH2B1EN (1 << 29)
+#define PRP_CNTL_CH2B2EN (1 << 30)
+#define PRP_CNTL_CH2FEN (1 << 31)
+
+#define PRP_SIZE_HEIGHT(x) (x)
+#define PRP_SIZE_WIDTH(x) ((x) << 16)
+
+/* IRQ Enable and status register */
+#define PRP_INTR_RDERR (1 << 0)
+#define PRP_INTR_CH1WERR (1 << 1)
+#define PRP_INTR_CH2WERR (1 << 2)
+#define PRP_INTR_CH1FC (1 << 3)
+#define PRP_INTR_CH2FC (1 << 5)
+#define PRP_INTR_LBOVF (1 << 7)
+#define PRP_INTR_CH2OVF (1 << 8)
+
+#define PRP_INTR_ST_RDERR (1 << 0)
+#define PRP_INTR_ST_CH1WERR (1 << 1)
+#define PRP_INTR_ST_CH2WERR (1 << 2)
+#define PRP_INTR_ST_CH2B2CI (1 << 3)
+#define PRP_INTR_ST_CH2B1CI (1 << 4)
+#define PRP_INTR_ST_CH1B2CI (1 << 5)
+#define PRP_INTR_ST_CH1B1CI (1 << 6)
+#define PRP_INTR_ST_LBOVF (1 << 7)
+#define PRP_INTR_ST_CH2OVF (1 << 8)
+
+struct emmaprp_fmt {
+ char *name;
+ u32 fourcc;
+ /* Types the format can be used for */
+ u32 types;
+};
+
+static struct emmaprp_fmt formats[] = {
+ {
+ .name = "YUV 4:2:0 Planar",
+ .fourcc = V4L2_PIX_FMT_YUV420,
+ .types = MEM2MEM_CAPTURE,
+ },
+ {
+ .name = "4:2:2, packed, YUYV",
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .types = MEM2MEM_OUTPUT,
+ },
+};
+
+/* Per-queue, driver-specific private data */
+struct emmaprp_q_data {
+ unsigned int width;
+ unsigned int height;
+ unsigned int sizeimage;
+ struct emmaprp_fmt *fmt;
+};
+
+enum {
+ V4L2_M2M_SRC = 0,
+ V4L2_M2M_DST = 1,
+};
+
+/* Source and destination queue data */
+static struct emmaprp_q_data q_data[2];
+
+static struct emmaprp_q_data *get_q_data(enum v4l2_buf_type type)
+{
+ switch (type) {
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ return &q_data[V4L2_M2M_SRC];
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ return &q_data[V4L2_M2M_DST];
+ default:
+ BUG();
+ }
+ return NULL;
+}
+
+#define NUM_FORMATS ARRAY_SIZE(formats)
+
+static struct emmaprp_fmt *find_format(struct v4l2_format *f)
+{
+ struct emmaprp_fmt *fmt;
+ unsigned int k;
+
+ for (k = 0; k < NUM_FORMATS; k++) {
+ fmt = &formats[k];
+ if (fmt->fourcc == f->fmt.pix.pixelformat)
+ break;
+ }
+
+ if (k == NUM_FORMATS)
+ return NULL;
+
+ return &formats[k];
+}
+
+struct emmaprp_dev {
+ struct v4l2_device v4l2_dev;
+ struct video_device *vfd;
+
+ atomic_t busy;
+ struct mutex dev_mutex;
+ spinlock_t irqlock;
+
+ int irq_emma;
+ void __iomem *base_emma;
+ struct clk *clk_emma;
+ struct resource *res_emma;
+
+ struct v4l2_m2m_dev *m2m_dev;
+ struct vb2_alloc_ctx *alloc_ctx;
+};
+
+struct emmaprp_ctx {
+ struct emmaprp_dev *dev;
+
+ /* Abort requested by m2m */
+ int aborting;
+
+ struct v4l2_m2m_ctx *m2m_ctx;
+};
+
+/*
+ * mem2mem callbacks
+ */
+static int emmaprp_job_ready(void *priv)
+{
+ struct emmaprp_ctx *ctx = priv;
+ struct emmaprp_dev *pcdev = ctx->dev;
+
+ if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
+ && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
+ && (atomic_read(&pcdev->busy) == 0))
+ return 1;
+
+ dprintk(pcdev, "Task not ready to run\n");
+
+ return 0;
+}
+
+static void emmaprp_job_abort(void *priv)
+{
+ struct emmaprp_ctx *ctx = priv;
+ struct emmaprp_dev *pcdev = ctx->dev;
+
+ ctx->aborting = 1;
+
+ dprintk(pcdev, "Aborting task\n");
+
+ v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
+}
+
+static void emmaprp_lock(void *priv)
+{
+ struct emmaprp_ctx *ctx = priv;
+ struct emmaprp_dev *pcdev = ctx->dev;
+ mutex_lock(&pcdev->dev_mutex);
+}
+
+static void emmaprp_unlock(void *priv)
+{
+ struct emmaprp_ctx *ctx = priv;
+ struct emmaprp_dev *pcdev = ctx->dev;
+ mutex_unlock(&pcdev->dev_mutex);
+}
+
+static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
+{
+ dprintk(pcdev,
+ "eMMa-PrP Registers:\n"
+ " SOURCE_Y_PTR = 0x%08X\n"
+ " SRC_FRAME_SIZE = 0x%08X\n"
+ " DEST_Y_PTR = 0x%08X\n"
+ " DEST_CR_PTR = 0x%08X\n"
+ " DEST_CB_PTR = 0x%08X\n"
+ " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
+ " CNTL = 0x%08X\n",
+ readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
+ readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
+ readl(pcdev->base_emma + PRP_DEST_Y_PTR),
+ readl(pcdev->base_emma + PRP_DEST_CR_PTR),
+ readl(pcdev->base_emma + PRP_DEST_CB_PTR),
+ readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
+ readl(pcdev->base_emma + PRP_CNTL));
+}
+
+static void emmaprp_device_run(void *priv)
+{
+ struct emmaprp_ctx *ctx = priv;
+ struct emmaprp_q_data *s_q_data, *d_q_data;
+ struct vb2_buffer *src_buf, *dst_buf;
+ struct emmaprp_dev *pcdev = ctx->dev;
+ unsigned int s_width, s_height;
+ unsigned int d_width, d_height;
+ unsigned int d_size;
+ u8 *p_in, *p_out;
+ u32 tmp;
+
+ atomic_set(&ctx->dev->busy, 1);
+
+ src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
+ dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+
+ s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
+ s_width = s_q_data->width;
+ s_height = s_q_data->height;
+
+ d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ d_width = d_q_data->width;
+ d_height = d_q_data->height;
+ d_size = d_width * d_height;
+
+ p_in = (u8 *)vb2_dma_contig_plane_dma_addr(src_buf, 0);
+ p_out = (u8 *)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
+ if (!p_in || !p_out) {
+ v4l2_err(&pcdev->v4l2_dev,
+ "Acquiring kernel pointers to buffers failed\n");
+ return;
+ }
+
+ /* Input frame parameters */
+ writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
+ writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
+ pcdev->base_emma + PRP_SRC_FRAME_SIZE);
+
+ /* Output frame parameters */
+ writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
+ writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
+ writel(p_out + d_size + (d_size >> 2),
+ pcdev->base_emma + PRP_DEST_CR_PTR);
+ writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
+ pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
+
+ /* IRQ configuration */
+ tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
+ writel(tmp | PRP_INTR_RDERR |
+ PRP_INTR_CH2WERR |
+ PRP_INTR_CH2FC,
+ pcdev->base_emma + PRP_INTR_CNTL);
+
+ emmaprp_dump_regs(pcdev);
+
+ /* Enable transfer */
+ tmp = readl(pcdev->base_emma + PRP_CNTL);
+ writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
+ PRP_CNTL_DATA_IN_YUV422 |
+ PRP_CNTL_CH2EN,
+ pcdev->base_emma + PRP_CNTL);
+}
+
+static irqreturn_t emmaprp_irq(int irq_emma, void *data)
+{
+ struct emmaprp_dev *pcdev = (struct emmaprp_dev *)data;
+ struct emmaprp_ctx *curr_ctx;
+ struct vb2_buffer *src_vb, *dst_vb;
+ unsigned long flags;
+ u32 irqst;
+
+ /* Check irq flags and clear irq */
+ irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
+ writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
+ dprintk(pcdev, "irqst = 0x%08x\n", irqst);
+
+ curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
+ if (NULL == curr_ctx) {
+ printk(KERN_ERR
+ "Instance released before the end of transaction\n");
+ return IRQ_HANDLED;
+ }
+
+ if (curr_ctx->aborting)
+ goto irq_ok;
+
+ if ((irqst & PRP_INTR_ST_RDERR) ||
+ (irqst & PRP_INTR_ST_CH2WERR)) {
+ printk(KERN_ERR
+ "PrP bus error ocurred, this transfer is probably corrupted\n");
+ writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
+ goto irq_ok;
+ }
+
+ if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
+ src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
+ dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
+
+ spin_lock_irqsave(&pcdev->irqlock, flags);
+ v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
+ v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
+ spin_unlock_irqrestore(&pcdev->irqlock, flags);
+ goto irq_ok;
+ }
+
+irq_ok:
+ atomic_set(&pcdev->busy, 0);
+ v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * video ioctls
+ */
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
+ strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
+ cap->bus_info[0] = 0;
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
+ | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
+{
+ int i, num;
+ struct emmaprp_fmt *fmt;
+
+ num = 0;
+
+ for (i = 0; i < NUM_FORMATS; ++i) {
+ if (formats[i].types & type) {
+ /* index-th format of type type found ? */
+ if (num == f->index)
+ break;
+ /* Correct type but haven't reached our index yet,
+ * just increment per-type index */
+ ++num;
+ }
+ }
+
+ if (i < NUM_FORMATS) {
+ /* Format found */
+ fmt = &formats[i];
+ strncpy(f->description, fmt->name, sizeof(f->description) - 1);
+ f->pixelformat = fmt->fourcc;
+ return 0;
+ }
+
+ /* Format not found */
+ return -EINVAL;
+}
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ return enum_fmt(f, MEM2MEM_CAPTURE);
+}
+
+static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ return enum_fmt(f, MEM2MEM_OUTPUT);
+}
+
+static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
+{
+ struct vb2_queue *vq;
+ struct emmaprp_q_data *q_data;
+
+ vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+ if (!vq)
+ return -EINVAL;
+
+ q_data = get_q_data(f->type);
+
+ f->fmt.pix.width = q_data->width;
+ f->fmt.pix.height = q_data->height;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.pixelformat = q_data->fmt->fourcc;
+ if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
+ f->fmt.pix.bytesperline = q_data->width * 3 / 2;
+ else /* YUYV */
+ f->fmt.pix.bytesperline = q_data->width * 2;
+ f->fmt.pix.sizeimage = q_data->sizeimage;
+
+ return 0;
+}
+
+static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ return vidioc_g_fmt(priv, f);
+}
+
+static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ return vidioc_g_fmt(priv, f);
+}
+
+static int vidioc_try_fmt(struct v4l2_format *f, struct emmaprp_fmt *fmt)
+{
+ enum v4l2_field field;
+
+ field = f->fmt.pix.field;
+
+ if (field == V4L2_FIELD_ANY)
+ field = V4L2_FIELD_NONE;
+ else if (V4L2_FIELD_NONE != field)
+ return -EINVAL;
+
+ /* V4L2 specification suggests the driver corrects the format struct
+ * if any of the dimensions is unsupported */
+ f->fmt.pix.field = field;
+
+ if (f->fmt.pix.height < MIN_H)
+ f->fmt.pix.height = MIN_H;
+ else if (f->fmt.pix.height > MAX_H)
+ f->fmt.pix.height = MAX_H;
+
+ if (f->fmt.pix.width < MIN_W)
+ f->fmt.pix.width = MIN_W;
+ else if (f->fmt.pix.width > MAX_W)
+ f->fmt.pix.width = MAX_W;
+
+ f->fmt.pix.height &= ~H_ALIGN_MASK;
+ if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
+ f->fmt.pix.width &= ~W_ALIGN_MASK_YUV420;
+ f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
+ } else { /* YUYV */
+ f->fmt.pix.width &= ~W_ALIGN_MASK_OTHERS;
+ f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
+ }
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+
+ return 0;
+}
+
+static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct emmaprp_fmt *fmt;
+ struct emmaprp_ctx *ctx = priv;
+
+ fmt = find_format(f);
+ if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
+ v4l2_err(&ctx->dev->v4l2_dev,
+ "Fourcc format (0x%08x) invalid.\n",
+ f->fmt.pix.pixelformat);
+ return -EINVAL;
+ }
+
+ return vidioc_try_fmt(f, fmt);
+}
+
+static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct emmaprp_fmt *fmt;
+ struct emmaprp_ctx *ctx = priv;
+
+ fmt = find_format(f);
+ if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
+ v4l2_err(&ctx->dev->v4l2_dev,
+ "Fourcc format (0x%08x) invalid.\n",
+ f->fmt.pix.pixelformat);
+ return -EINVAL;
+ }
+
+ return vidioc_try_fmt(f, fmt);
+}
+
+static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
+{
+ struct emmaprp_q_data *q_data;
+ struct vb2_queue *vq;
+
+ vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+ if (!vq)
+ return -EINVAL;
+
+ q_data = get_q_data(f->type);
+ if (!q_data)
+ return -EINVAL;
+
+ if (vb2_is_busy(vq)) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
+ return -EBUSY;
+ }
+
+ q_data->fmt = find_format(f);
+ q_data->width = f->fmt.pix.width;
+ q_data->height = f->fmt.pix.height;
+ if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
+ q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
+ else /* YUYV */
+ q_data->sizeimage = q_data->width * q_data->height * 2;
+
+ dprintk(ctx->dev,
+ "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
+ f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
+
+ return 0;
+}
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ int ret;
+
+ ret = vidioc_try_fmt_vid_cap(file, priv, f);
+ if (ret)
+ return ret;
+
+ return vidioc_s_fmt(priv, f);
+}
+
+static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ int ret;
+
+ ret = vidioc_try_fmt_vid_out(file, priv, f);
+ if (ret)
+ return ret;
+
+ return vidioc_s_fmt(priv, f);
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *reqbufs)
+{
+ struct emmaprp_ctx *ctx = priv;
+
+ return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
+}
+
+static int vidioc_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct emmaprp_ctx *ctx = priv;
+
+ return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+ struct emmaprp_ctx *ctx = priv;
+
+ return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+ struct emmaprp_ctx *ctx = priv;
+
+ return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int vidioc_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct emmaprp_ctx *ctx = priv;
+
+ return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
+}
+
+static int vidioc_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct emmaprp_ctx *ctx = priv;
+
+ return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
+}
+
+static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+
+ .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
+
+ .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
+ .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
+ .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
+ .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
+
+ .vidioc_reqbufs = vidioc_reqbufs,
+ .vidioc_querybuf = vidioc_querybuf,
+
+ .vidioc_qbuf = vidioc_qbuf,
+ .vidioc_dqbuf = vidioc_dqbuf,
+
+ .vidioc_streamon = vidioc_streamon,
+ .vidioc_streamoff = vidioc_streamoff,
+};
+
+
+/*
+ * Queue operations
+ */
+struct vb2_dc_conf {
+ struct device *dev;
+};
+
+static int emmaprp_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
+ struct emmaprp_q_data *q_data;
+ unsigned int size, count = *nbuffers;
+
+ q_data = get_q_data(vq->type);
+
+ if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
+ size = q_data->width * q_data->height * 3 / 2;
+ else
+ size = q_data->width * q_data->height * 2;
+
+ while (size * count > MEM2MEM_VID_MEM_LIMIT)
+ (count)--;
+
+ *nplanes = 1;
+ *nbuffers = count;
+ sizes[0] = size;
+
+ alloc_ctxs[0] = ctx->dev->alloc_ctx;
+
+ dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
+
+ return 0;
+}
+
+static int emmaprp_buf_prepare(struct vb2_buffer *vb)
+{
+ struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct emmaprp_q_data *q_data;
+
+ dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
+
+ q_data = get_q_data(vb->vb2_queue->type);
+
+ if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
+ dprintk(ctx->dev, "%s data will not fit into plane"
+ "(%lu < %lu)\n", __func__,
+ vb2_plane_size(vb, 0),
+ (long)q_data->sizeimage);
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(vb, 0, q_data->sizeimage);
+
+ return 0;
+}
+
+static void emmaprp_buf_queue(struct vb2_buffer *vb)
+{
+ struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
+}
+
+static struct vb2_ops emmaprp_qops = {
+ .queue_setup = emmaprp_queue_setup,
+ .buf_prepare = emmaprp_buf_prepare,
+ .buf_queue = emmaprp_buf_queue,
+};
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct emmaprp_ctx *ctx = priv;
+ int ret;
+
+ memset(src_vq, 0, sizeof(*src_vq));
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ src_vq->io_modes = VB2_MMAP;
+ src_vq->drv_priv = ctx;
+ src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ src_vq->ops = &emmaprp_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+
+ ret = vb2_queue_init(src_vq);
+ if (ret)
+ return ret;
+
+ memset(dst_vq, 0, sizeof(*dst_vq));
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ dst_vq->io_modes = VB2_MMAP;
+ dst_vq->drv_priv = ctx;
+ dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ dst_vq->ops = &emmaprp_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+
+ return vb2_queue_init(dst_vq);
+}
+
+/*
+ * File operations
+ */
+static int emmaprp_open(struct file *file)
+{
+ struct emmaprp_dev *pcdev = video_drvdata(file);
+ struct emmaprp_ctx *ctx = NULL;
+
+ ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ file->private_data = ctx;
+ ctx->dev = pcdev;
+
+ ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
+
+ if (IS_ERR(ctx->m2m_ctx)) {
+ int ret = PTR_ERR(ctx->m2m_ctx);
+
+ kfree(ctx);
+ return ret;
+ }
+
+ clk_enable(pcdev->clk_emma);
+
+ dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
+
+ return 0;
+}
+
+static int emmaprp_release(struct file *file)
+{
+ struct emmaprp_dev *pcdev = video_drvdata(file);
+ struct emmaprp_ctx *ctx = file->private_data;
+
+ dprintk(pcdev, "Releasing instance %p\n", ctx);
+
+ clk_disable(pcdev->clk_emma);
+ v4l2_m2m_ctx_release(ctx->m2m_ctx);
+ kfree(ctx);
+
+ return 0;
+}
+
+static unsigned int emmaprp_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct emmaprp_ctx *ctx = file->private_data;
+
+ return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
+}
+
+static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct emmaprp_ctx *ctx = file->private_data;
+
+ return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
+}
+
+static const struct v4l2_file_operations emmaprp_fops = {
+ .owner = THIS_MODULE,
+ .open = emmaprp_open,
+ .release = emmaprp_release,
+ .poll = emmaprp_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = emmaprp_mmap,
+};
+
+static struct video_device emmaprp_videodev = {
+ .name = MEM2MEM_NAME,
+ .fops = &emmaprp_fops,
+ .ioctl_ops = &emmaprp_ioctl_ops,
+ .minor = -1,
+ .release = video_device_release,
+};
+
+static struct v4l2_m2m_ops m2m_ops = {
+ .device_run = emmaprp_device_run,
+ .job_ready = emmaprp_job_ready,
+ .job_abort = emmaprp_job_abort,
+ .lock = emmaprp_lock,
+ .unlock = emmaprp_unlock,
+};
+
+static int emmaprp_probe(struct platform_device *pdev)
+{
+ struct emmaprp_dev *pcdev;
+ struct video_device *vfd;
+ struct resource *res_emma;
+ int irq_emma;
+ int ret;
+
+ pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
+ if (!pcdev)
+ return -ENOMEM;
+
+ spin_lock_init(&pcdev->irqlock);
+
+ pcdev->clk_emma = clk_get(NULL, "emma");
+ if (IS_ERR(pcdev->clk_emma)) {
+ ret = PTR_ERR(pcdev->clk_emma);
+ goto free_dev;
+ }
+
+ irq_emma = platform_get_irq(pdev, 0);
+ res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (irq_emma < 0 || res_emma == NULL) {
+ dev_err(&pdev->dev, "Missing platform resources data\n");
+ ret = -ENODEV;
+ goto free_clk;
+ }
+
+ ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
+ if (ret)
+ goto free_clk;
+
+ atomic_set(&pcdev->busy, 0);
+ mutex_init(&pcdev->dev_mutex);
+
+ vfd = video_device_alloc();
+ if (!vfd) {
+ v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
+ ret = -ENOMEM;
+ goto unreg_dev;
+ }
+
+ *vfd = emmaprp_videodev;
+ vfd->lock = &pcdev->dev_mutex;
+
+ ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
+ if (ret) {
+ v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
+ goto rel_vdev;
+ }
+
+ video_set_drvdata(vfd, pcdev);
+ snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
+ pcdev->vfd = vfd;
+ v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
+ " Device registered as /dev/video%d\n", vfd->num);
+
+ platform_set_drvdata(pdev, pcdev);
+
+ if (!request_mem_region(res_emma->start, resource_size(res_emma),
+ MEM2MEM_NAME)) {
+ ret = -EBUSY;
+ goto rel_vdev;
+ }
+
+ pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma));
+ if (!pcdev->base_emma) {
+ ret = -ENOMEM;
+ goto rel_mem;
+ }
+ pcdev->irq_emma = irq_emma;
+ pcdev->res_emma = res_emma;
+
+ ret = request_irq(pcdev->irq_emma, emmaprp_irq, 0,
+ MEM2MEM_NAME, pcdev);
+ if (ret)
+ goto rel_map;
+
+
+ pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(pcdev->alloc_ctx)) {
+ v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
+ ret = PTR_ERR(pcdev->alloc_ctx);
+ goto err_ctx;
+ }
+
+ pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
+ if (IS_ERR(pcdev->m2m_dev)) {
+ v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
+ ret = PTR_ERR(pcdev->m2m_dev);
+ goto err_m2m;
+ }
+
+ q_data[V4L2_M2M_SRC].fmt = &formats[1];
+ q_data[V4L2_M2M_DST].fmt = &formats[0];
+
+ return 0;
+
+ v4l2_m2m_release(pcdev->m2m_dev);
+err_m2m:
+ video_unregister_device(pcdev->vfd);
+err_ctx:
+ vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
+ free_irq(pcdev->irq_emma, pcdev);
+rel_map:
+ iounmap(pcdev->base_emma);
+rel_mem:
+ release_mem_region(res_emma->start, resource_size(res_emma));
+rel_vdev:
+ video_device_release(vfd);
+unreg_dev:
+ v4l2_device_unregister(&pcdev->v4l2_dev);
+free_clk:
+ clk_put(pcdev->clk_emma);
+free_dev:
+ kfree(pcdev);
+
+ return ret;
+}
+
+static int emmaprp_remove(struct platform_device *pdev)
+{
+ struct resource *res_emma;
+ struct emmaprp_dev *pcdev =
+ (struct emmaprp_dev *)platform_get_drvdata(pdev);
+
+ v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
+ v4l2_m2m_release(pcdev->m2m_dev);
+ free_irq(pcdev->irq_emma, pcdev);
+ iounmap(pcdev->base_emma);
+ res_emma = pcdev->res_emma;
+ release_mem_region(res_emma->start, resource_size(res_emma));
+ video_unregister_device(pcdev->vfd);
+ v4l2_device_unregister(&pcdev->v4l2_dev);
+ clk_put(pcdev->clk_emma);
+ vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
+
+ kfree(pcdev);
+
+ return 0;
+}
+
+static struct platform_driver emmaprp_pdrv = {
+ .probe = emmaprp_probe,
+ .remove = emmaprp_remove,
+ .driver = {
+ .name = MEM2MEM_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static void __exit emmaprp_exit(void)
+{
+ platform_driver_unregister(&emmaprp_pdrv);
+}
+
+static int __init emmaprp_init(void)
+{
+ return platform_driver_register(&emmaprp_pdrv);
+}
+
+module_init(emmaprp_init);
+module_exit(emmaprp_exit);
+