[08/21] media: i2c: imx258: Add support for 24MHz clock
Commit Message
There's no reason why only a clock of 19.2MHz is supported.
Indeed this isn't even a frequency listed in the datasheet.
Add support for 24MHz as well.
The PLL settings result in slightly different link frequencies,
so parameterise those.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/media/i2c/imx258.c | 137 ++++++++++++++++++++++++++++++-------
1 file changed, 111 insertions(+), 26 deletions(-)
Comments
Hi Dave
On Tue, May 30, 2023 at 06:29:47PM +0100, Dave Stevenson wrote:
> There's no reason why only a clock of 19.2MHz is supported.
> Indeed this isn't even a frequency listed in the datasheet.
>
> Add support for 24MHz as well.
> The PLL settings result in slightly different link frequencies,
> so parameterise those.
>
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
> ---
> drivers/media/i2c/imx258.c | 137 ++++++++++++++++++++++++++++++-------
> 1 file changed, 111 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> index 5a57d0b5fcd8..d40521f9a3c6 100644
> --- a/drivers/media/i2c/imx258.c
> +++ b/drivers/media/i2c/imx258.c
> @@ -76,9 +76,6 @@
> #define REG_CONFIG_MIRROR_FLIP 0x03
> #define REG_CONFIG_FLIP_TEST_PATTERN 0x02
>
> -/* Input clock frequency in Hz */
> -#define IMX258_INPUT_CLOCK_FREQ 19200000
> -
> struct imx258_reg {
> u16 address;
> u8 val;
> @@ -91,6 +88,7 @@ struct imx258_reg_list {
>
> /* Link frequency config */
> struct imx258_link_freq_config {
> + u64 link_frequency;
Is this used ?
> u32 pixels_per_line;
Also this seems to be set a fixed value of IMX258_PPL_DEFAULT
>
> /* PLL registers for this link frequency */
> @@ -115,7 +113,9 @@ struct imx258_mode {
> };
>
> /* 4208x3120 needs 1267Mbps/lane, 4 lanes */
> -static const struct imx258_reg mipi_data_rate_1267mbps[] = {
> +static const struct imx258_reg mipi_1267mbps_19_2mhz[] = {
> + { 0x0136, 0x13 },
> + { 0x0137, 0x33 },
> { 0x0301, 0x05 },
> { 0x0303, 0x02 },
> { 0x0305, 0x03 },
> @@ -133,7 +133,29 @@ static const struct imx258_reg mipi_data_rate_1267mbps[] = {
> { 0x0823, 0xCC },
> };
>
> -static const struct imx258_reg mipi_data_rate_640mbps[] = {
> +static const struct imx258_reg mipi_1272mbps_24mhz[] = {
> + { 0x0136, 0x18 },
> + { 0x0137, 0x00 },
> + { 0x0301, 0x05 },
> + { 0x0303, 0x02 },
> + { 0x0305, 0x04 },
> + { 0x0306, 0x00 },
> + { 0x0307, 0xD4 },
> + { 0x0309, 0x0A },
> + { 0x030B, 0x01 },
> + { 0x030D, 0x02 },
> + { 0x030E, 0x00 },
> + { 0x030F, 0xD8 },
> + { 0x0310, 0x00 },
> + { 0x0820, 0x13 },
> + { 0x0821, 0x4C },
> + { 0x0822, 0xCC },
> + { 0x0823, 0xCC },
> +};
I'll assume that if this work as intended, the register sequence is
correct (ie: I've not checked the registers configuration)
> +
> +static const struct imx258_reg mipi_640mbps_19_2mhz[] = {
> + { 0x0136, 0x13 },
> + { 0x0137, 0x33 },
> { 0x0301, 0x05 },
> { 0x0303, 0x02 },
> { 0x0305, 0x03 },
> @@ -151,9 +173,27 @@ static const struct imx258_reg mipi_data_rate_640mbps[] = {
> { 0x0823, 0x00 },
> };
>
> +static const struct imx258_reg mipi_642mbps_24mhz[] = {
> + { 0x0136, 0x18 },
> + { 0x0137, 0x00 },
> + { 0x0301, 0x05 },
> + { 0x0303, 0x02 },
> + { 0x0305, 0x04 },
> + { 0x0306, 0x00 },
> + { 0x0307, 0x6B },
> + { 0x0309, 0x0A },
> + { 0x030B, 0x01 },
> + { 0x030D, 0x02 },
> + { 0x030E, 0x00 },
> + { 0x030F, 0xD8 },
> + { 0x0310, 0x00 },
> + { 0x0820, 0x0A },
> + { 0x0821, 0x00 },
> + { 0x0822, 0x00 },
> + { 0x0823, 0x00 },
> +};
> +
> static const struct imx258_reg mode_common_regs[] = {
> - { 0x0136, 0x13 },
> - { 0x0137, 0x33 },
> { 0x3051, 0x00 },
> { 0x3052, 0x00 },
> { 0x4E21, 0x14 },
> @@ -313,10 +353,6 @@ static const char * const imx258_supply_name[] = {
>
> #define IMX258_NUM_SUPPLIES ARRAY_SIZE(imx258_supply_name)
>
> -/* Configurations for supported link frequencies */
> -#define IMX258_LINK_FREQ_634MHZ 633600000ULL
> -#define IMX258_LINK_FREQ_320MHZ 320000000ULL
> -
> enum {
> IMX258_LINK_FREQ_1267MBPS,
> IMX258_LINK_FREQ_640MBPS,
> @@ -335,25 +371,55 @@ static u64 link_freq_to_pixel_rate(u64 f)
> }
>
> /* Menu items for LINK_FREQ V4L2 control */
> -static const s64 link_freq_menu_items[] = {
> +/* Configurations for supported link frequencies */
> +#define IMX258_LINK_FREQ_634MHZ 633600000ULL
> +#define IMX258_LINK_FREQ_320MHZ 320000000ULL
> +
> +static const s64 link_freq_menu_items_19_2[] = {
> IMX258_LINK_FREQ_634MHZ,
> IMX258_LINK_FREQ_320MHZ,
> };
>
> +/* Configurations for supported link frequencies */
> +#define IMX258_LINK_FREQ_636MHZ 636000000ULL
> +#define IMX258_LINK_FREQ_321MHZ 321000000ULL
> +
> +static const s64 link_freq_menu_items_24[] = {
> + IMX258_LINK_FREQ_636MHZ,
> + IMX258_LINK_FREQ_321MHZ,
> +};
> +
> /* Link frequency configs */
> -static const struct imx258_link_freq_config link_freq_configs[] = {
> +static const struct imx258_link_freq_config link_freq_configs_19_2[] = {
> + [IMX258_LINK_FREQ_1267MBPS] = {
> + .pixels_per_line = IMX258_PPL_DEFAULT,
> + .reg_list = {
> + .num_of_regs = ARRAY_SIZE(mipi_1267mbps_19_2mhz),
> + .regs = mipi_1267mbps_19_2mhz,
> + }
> + },
> + [IMX258_LINK_FREQ_640MBPS] = {
> + .pixels_per_line = IMX258_PPL_DEFAULT,
> + .reg_list = {
> + .num_of_regs = ARRAY_SIZE(mipi_640mbps_19_2mhz),
> + .regs = mipi_640mbps_19_2mhz,
> + }
> + },
> +};
> +
> +static const struct imx258_link_freq_config link_freq_configs_24[] = {
> [IMX258_LINK_FREQ_1267MBPS] = {
This doesn't match anymore the actual bus freq, I don't think it's
a real issue, but I wonder if simply indexing with '0' and '1'
wouldn't be less confusing..
> .pixels_per_line = IMX258_PPL_DEFAULT,
> .reg_list = {
> - .num_of_regs = ARRAY_SIZE(mipi_data_rate_1267mbps),
> - .regs = mipi_data_rate_1267mbps,
> + .num_of_regs = ARRAY_SIZE(mipi_1272mbps_24mhz),
> + .regs = mipi_1272mbps_24mhz,
> }
> },
> [IMX258_LINK_FREQ_640MBPS] = {
> .pixels_per_line = IMX258_PPL_DEFAULT,
> .reg_list = {
> - .num_of_regs = ARRAY_SIZE(mipi_data_rate_640mbps),
> - .regs = mipi_data_rate_640mbps,
> + .num_of_regs = ARRAY_SIZE(mipi_642mbps_24mhz),
> + .regs = mipi_642mbps_24mhz,
> }
> },
> };
> @@ -410,6 +476,9 @@ struct imx258 {
> /* Current mode */
> const struct imx258_mode *cur_mode;
>
> + const struct imx258_link_freq_config *link_freq_configs;
> + const s64 *link_freq_menu_items;
> +
> /*
> * Mutex for serialized access:
> * Protect sensor module set pad format and start/stop streaming safely.
> @@ -717,7 +786,7 @@ static int imx258_set_pad_format(struct v4l2_subdev *sd,
> imx258->cur_mode = mode;
> __v4l2_ctrl_s_ctrl(imx258->link_freq, mode->link_freq_index);
>
> - link_freq = link_freq_menu_items[mode->link_freq_index];
> + link_freq = imx258->link_freq_menu_items[mode->link_freq_index];
> pixel_rate = link_freq_to_pixel_rate(link_freq);
> __v4l2_ctrl_s_ctrl_int64(imx258->pixel_rate, pixel_rate);
> /* Update limits and set FPS to default */
> @@ -731,7 +800,7 @@ static int imx258_set_pad_format(struct v4l2_subdev *sd,
> vblank_def);
> __v4l2_ctrl_s_ctrl(imx258->vblank, vblank_def);
> h_blank =
> - link_freq_configs[mode->link_freq_index].pixels_per_line
> + imx258->link_freq_configs[mode->link_freq_index].pixels_per_line
> - imx258->cur_mode->width;
> __v4l2_ctrl_modify_range(imx258->hblank, h_blank,
> h_blank, 1, h_blank);
> @@ -751,7 +820,7 @@ static int imx258_start_streaming(struct imx258 *imx258)
>
> /* Setup PLL */
> link_freq_index = imx258->cur_mode->link_freq_index;
> - reg_list = &link_freq_configs[link_freq_index].reg_list;
> + reg_list = &imx258->link_freq_configs[link_freq_index].reg_list;
> ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
> if (ret) {
> dev_err(&client->dev, "%s failed to set plls\n", __func__);
> @@ -986,9 +1055,9 @@ static int imx258_init_controls(struct imx258 *imx258)
> imx258->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
> &imx258_ctrl_ops,
> V4L2_CID_LINK_FREQ,
> - ARRAY_SIZE(link_freq_menu_items) - 1,
> + ARRAY_SIZE(link_freq_menu_items_19_2) - 1,
> 0,
> - link_freq_menu_items);
> + imx258->link_freq_menu_items);
>
> if (imx258->link_freq)
> imx258->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> @@ -1004,8 +1073,10 @@ static int imx258_init_controls(struct imx258 *imx258)
> if (vflip)
> vflip->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>
> - pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
> - pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]);
> + pixel_rate_max =
> + link_freq_to_pixel_rate(imx258->link_freq_menu_items[0]);
> + pixel_rate_min =
> + link_freq_to_pixel_rate(imx258->link_freq_menu_items[1]);
> /* By default, PIXEL_RATE is read only */
> imx258->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops,
> V4L2_CID_PIXEL_RATE,
> @@ -1123,11 +1194,25 @@ static int imx258_probe(struct i2c_client *client)
> "no clock provided, using clock-frequency property\n");
>
> device_property_read_u32(&client->dev, "clock-frequency", &val);
> + } else if (IS_ERR(imx258->clk)) {
> + return dev_err_probe(&client->dev, PTR_ERR(imx258->clk),
> + "error getting clock\n");
Maybe a copy&paste error, as I see the IS_ERR(imx258->clk) condition
being handled just after getting the clock
> } else {
> val = clk_get_rate(imx258->clk);
> }
> - if (val != IMX258_INPUT_CLOCK_FREQ) {
> - dev_err(&client->dev, "input clock frequency not supported\n");
> +
> + switch (val) {
> + case 19200000:
> + imx258->link_freq_configs = link_freq_configs_19_2;
> + imx258->link_freq_menu_items = link_freq_menu_items_19_2;
> + break;
> + case 24000000:
> + imx258->link_freq_configs = link_freq_configs_24;
> + imx258->link_freq_menu_items = link_freq_menu_items_24;
> + break;
> + default:
> + dev_err(&client->dev, "input clock frequency of %u not supported\n",
> + val);
> return -EINVAL;
> }
>
> --
> 2.25.1
>
@@ -76,9 +76,6 @@
#define REG_CONFIG_MIRROR_FLIP 0x03
#define REG_CONFIG_FLIP_TEST_PATTERN 0x02
-/* Input clock frequency in Hz */
-#define IMX258_INPUT_CLOCK_FREQ 19200000
-
struct imx258_reg {
u16 address;
u8 val;
@@ -91,6 +88,7 @@ struct imx258_reg_list {
/* Link frequency config */
struct imx258_link_freq_config {
+ u64 link_frequency;
u32 pixels_per_line;
/* PLL registers for this link frequency */
@@ -115,7 +113,9 @@ struct imx258_mode {
};
/* 4208x3120 needs 1267Mbps/lane, 4 lanes */
-static const struct imx258_reg mipi_data_rate_1267mbps[] = {
+static const struct imx258_reg mipi_1267mbps_19_2mhz[] = {
+ { 0x0136, 0x13 },
+ { 0x0137, 0x33 },
{ 0x0301, 0x05 },
{ 0x0303, 0x02 },
{ 0x0305, 0x03 },
@@ -133,7 +133,29 @@ static const struct imx258_reg mipi_data_rate_1267mbps[] = {
{ 0x0823, 0xCC },
};
-static const struct imx258_reg mipi_data_rate_640mbps[] = {
+static const struct imx258_reg mipi_1272mbps_24mhz[] = {
+ { 0x0136, 0x18 },
+ { 0x0137, 0x00 },
+ { 0x0301, 0x05 },
+ { 0x0303, 0x02 },
+ { 0x0305, 0x04 },
+ { 0x0306, 0x00 },
+ { 0x0307, 0xD4 },
+ { 0x0309, 0x0A },
+ { 0x030B, 0x01 },
+ { 0x030D, 0x02 },
+ { 0x030E, 0x00 },
+ { 0x030F, 0xD8 },
+ { 0x0310, 0x00 },
+ { 0x0820, 0x13 },
+ { 0x0821, 0x4C },
+ { 0x0822, 0xCC },
+ { 0x0823, 0xCC },
+};
+
+static const struct imx258_reg mipi_640mbps_19_2mhz[] = {
+ { 0x0136, 0x13 },
+ { 0x0137, 0x33 },
{ 0x0301, 0x05 },
{ 0x0303, 0x02 },
{ 0x0305, 0x03 },
@@ -151,9 +173,27 @@ static const struct imx258_reg mipi_data_rate_640mbps[] = {
{ 0x0823, 0x00 },
};
+static const struct imx258_reg mipi_642mbps_24mhz[] = {
+ { 0x0136, 0x18 },
+ { 0x0137, 0x00 },
+ { 0x0301, 0x05 },
+ { 0x0303, 0x02 },
+ { 0x0305, 0x04 },
+ { 0x0306, 0x00 },
+ { 0x0307, 0x6B },
+ { 0x0309, 0x0A },
+ { 0x030B, 0x01 },
+ { 0x030D, 0x02 },
+ { 0x030E, 0x00 },
+ { 0x030F, 0xD8 },
+ { 0x0310, 0x00 },
+ { 0x0820, 0x0A },
+ { 0x0821, 0x00 },
+ { 0x0822, 0x00 },
+ { 0x0823, 0x00 },
+};
+
static const struct imx258_reg mode_common_regs[] = {
- { 0x0136, 0x13 },
- { 0x0137, 0x33 },
{ 0x3051, 0x00 },
{ 0x3052, 0x00 },
{ 0x4E21, 0x14 },
@@ -313,10 +353,6 @@ static const char * const imx258_supply_name[] = {
#define IMX258_NUM_SUPPLIES ARRAY_SIZE(imx258_supply_name)
-/* Configurations for supported link frequencies */
-#define IMX258_LINK_FREQ_634MHZ 633600000ULL
-#define IMX258_LINK_FREQ_320MHZ 320000000ULL
-
enum {
IMX258_LINK_FREQ_1267MBPS,
IMX258_LINK_FREQ_640MBPS,
@@ -335,25 +371,55 @@ static u64 link_freq_to_pixel_rate(u64 f)
}
/* Menu items for LINK_FREQ V4L2 control */
-static const s64 link_freq_menu_items[] = {
+/* Configurations for supported link frequencies */
+#define IMX258_LINK_FREQ_634MHZ 633600000ULL
+#define IMX258_LINK_FREQ_320MHZ 320000000ULL
+
+static const s64 link_freq_menu_items_19_2[] = {
IMX258_LINK_FREQ_634MHZ,
IMX258_LINK_FREQ_320MHZ,
};
+/* Configurations for supported link frequencies */
+#define IMX258_LINK_FREQ_636MHZ 636000000ULL
+#define IMX258_LINK_FREQ_321MHZ 321000000ULL
+
+static const s64 link_freq_menu_items_24[] = {
+ IMX258_LINK_FREQ_636MHZ,
+ IMX258_LINK_FREQ_321MHZ,
+};
+
/* Link frequency configs */
-static const struct imx258_link_freq_config link_freq_configs[] = {
+static const struct imx258_link_freq_config link_freq_configs_19_2[] = {
+ [IMX258_LINK_FREQ_1267MBPS] = {
+ .pixels_per_line = IMX258_PPL_DEFAULT,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mipi_1267mbps_19_2mhz),
+ .regs = mipi_1267mbps_19_2mhz,
+ }
+ },
+ [IMX258_LINK_FREQ_640MBPS] = {
+ .pixels_per_line = IMX258_PPL_DEFAULT,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mipi_640mbps_19_2mhz),
+ .regs = mipi_640mbps_19_2mhz,
+ }
+ },
+};
+
+static const struct imx258_link_freq_config link_freq_configs_24[] = {
[IMX258_LINK_FREQ_1267MBPS] = {
.pixels_per_line = IMX258_PPL_DEFAULT,
.reg_list = {
- .num_of_regs = ARRAY_SIZE(mipi_data_rate_1267mbps),
- .regs = mipi_data_rate_1267mbps,
+ .num_of_regs = ARRAY_SIZE(mipi_1272mbps_24mhz),
+ .regs = mipi_1272mbps_24mhz,
}
},
[IMX258_LINK_FREQ_640MBPS] = {
.pixels_per_line = IMX258_PPL_DEFAULT,
.reg_list = {
- .num_of_regs = ARRAY_SIZE(mipi_data_rate_640mbps),
- .regs = mipi_data_rate_640mbps,
+ .num_of_regs = ARRAY_SIZE(mipi_642mbps_24mhz),
+ .regs = mipi_642mbps_24mhz,
}
},
};
@@ -410,6 +476,9 @@ struct imx258 {
/* Current mode */
const struct imx258_mode *cur_mode;
+ const struct imx258_link_freq_config *link_freq_configs;
+ const s64 *link_freq_menu_items;
+
/*
* Mutex for serialized access:
* Protect sensor module set pad format and start/stop streaming safely.
@@ -717,7 +786,7 @@ static int imx258_set_pad_format(struct v4l2_subdev *sd,
imx258->cur_mode = mode;
__v4l2_ctrl_s_ctrl(imx258->link_freq, mode->link_freq_index);
- link_freq = link_freq_menu_items[mode->link_freq_index];
+ link_freq = imx258->link_freq_menu_items[mode->link_freq_index];
pixel_rate = link_freq_to_pixel_rate(link_freq);
__v4l2_ctrl_s_ctrl_int64(imx258->pixel_rate, pixel_rate);
/* Update limits and set FPS to default */
@@ -731,7 +800,7 @@ static int imx258_set_pad_format(struct v4l2_subdev *sd,
vblank_def);
__v4l2_ctrl_s_ctrl(imx258->vblank, vblank_def);
h_blank =
- link_freq_configs[mode->link_freq_index].pixels_per_line
+ imx258->link_freq_configs[mode->link_freq_index].pixels_per_line
- imx258->cur_mode->width;
__v4l2_ctrl_modify_range(imx258->hblank, h_blank,
h_blank, 1, h_blank);
@@ -751,7 +820,7 @@ static int imx258_start_streaming(struct imx258 *imx258)
/* Setup PLL */
link_freq_index = imx258->cur_mode->link_freq_index;
- reg_list = &link_freq_configs[link_freq_index].reg_list;
+ reg_list = &imx258->link_freq_configs[link_freq_index].reg_list;
ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
if (ret) {
dev_err(&client->dev, "%s failed to set plls\n", __func__);
@@ -986,9 +1055,9 @@ static int imx258_init_controls(struct imx258 *imx258)
imx258->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
&imx258_ctrl_ops,
V4L2_CID_LINK_FREQ,
- ARRAY_SIZE(link_freq_menu_items) - 1,
+ ARRAY_SIZE(link_freq_menu_items_19_2) - 1,
0,
- link_freq_menu_items);
+ imx258->link_freq_menu_items);
if (imx258->link_freq)
imx258->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
@@ -1004,8 +1073,10 @@ static int imx258_init_controls(struct imx258 *imx258)
if (vflip)
vflip->flags |= V4L2_CTRL_FLAG_READ_ONLY;
- pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
- pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]);
+ pixel_rate_max =
+ link_freq_to_pixel_rate(imx258->link_freq_menu_items[0]);
+ pixel_rate_min =
+ link_freq_to_pixel_rate(imx258->link_freq_menu_items[1]);
/* By default, PIXEL_RATE is read only */
imx258->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops,
V4L2_CID_PIXEL_RATE,
@@ -1123,11 +1194,25 @@ static int imx258_probe(struct i2c_client *client)
"no clock provided, using clock-frequency property\n");
device_property_read_u32(&client->dev, "clock-frequency", &val);
+ } else if (IS_ERR(imx258->clk)) {
+ return dev_err_probe(&client->dev, PTR_ERR(imx258->clk),
+ "error getting clock\n");
} else {
val = clk_get_rate(imx258->clk);
}
- if (val != IMX258_INPUT_CLOCK_FREQ) {
- dev_err(&client->dev, "input clock frequency not supported\n");
+
+ switch (val) {
+ case 19200000:
+ imx258->link_freq_configs = link_freq_configs_19_2;
+ imx258->link_freq_menu_items = link_freq_menu_items_19_2;
+ break;
+ case 24000000:
+ imx258->link_freq_configs = link_freq_configs_24;
+ imx258->link_freq_menu_items = link_freq_menu_items_24;
+ break;
+ default:
+ dev_err(&client->dev, "input clock frequency of %u not supported\n",
+ val);
return -EINVAL;
}