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SubjectRe: [PATCH v2 1/3] media: vimc: Support multiple media bus codes for each pixelformat
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Hi Nícolas,

thank you for the patch.

The series looks good in general, just minor comments below.

On 3/26/20 6:47 PM, Nícolas F. R. A. Prado wrote:
> Change vimc_pix_map_list to allow multiple media bus codes to map to the
> same pixelformat, making it possible to add media bus codes for which
> there are no pixelformat.
>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@protonmail.com>
> ---
>
> Changes in v2:
> - Fix vimc_mbus_code_by_index not checking code array bounds
> - Fix array formatting
> - Rename variables
> - Change code array size
> - Add comment about vimc_mbus_code_by_index return value
>
> drivers/media/platform/vimc/vimc-common.c | 70 ++++++++++++++---------
> drivers/media/platform/vimc/vimc-common.h | 11 +++-
> drivers/media/platform/vimc/vimc-scaler.c | 10 +++-
> drivers/media/platform/vimc/vimc-sensor.c | 6 +-
> 4 files changed, 65 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/media/platform/vimc/vimc-common.c b/drivers/media/platform/vimc/vimc-common.c
> index c95c17c048f2..119846f3eaa5 100644
> --- a/drivers/media/platform/vimc/vimc-common.c
> +++ b/drivers/media/platform/vimc/vimc-common.c
> @@ -19,19 +19,19 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
>
> /* RGB formats */
> {
> - .code = MEDIA_BUS_FMT_BGR888_1X24,
> + .code = { MEDIA_BUS_FMT_BGR888_1X24 },
> .pixelformat = V4L2_PIX_FMT_BGR24,
> .bpp = 3,
> .bayer = false,
> },
> {
> - .code = MEDIA_BUS_FMT_RGB888_1X24,
> + .code = { MEDIA_BUS_FMT_RGB888_1X24 },
> .pixelformat = V4L2_PIX_FMT_RGB24,
> .bpp = 3,
> .bayer = false,
> },
> {
> - .code = MEDIA_BUS_FMT_ARGB8888_1X32,
> + .code = { MEDIA_BUS_FMT_ARGB8888_1X32 },
> .pixelformat = V4L2_PIX_FMT_ARGB32,
> .bpp = 4,
> .bayer = false,
> @@ -39,49 +39,49 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
>
> /* Bayer formats */
> {
> - .code = MEDIA_BUS_FMT_SBGGR8_1X8,
> + .code = { MEDIA_BUS_FMT_SBGGR8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SBGGR8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGBRG8_1X8,
> + .code = { MEDIA_BUS_FMT_SGBRG8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SGBRG8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGRBG8_1X8,
> + .code = { MEDIA_BUS_FMT_SGRBG8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SGRBG8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SRGGB8_1X8,
> + .code = { MEDIA_BUS_FMT_SRGGB8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SRGGB8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SBGGR10_1X10,
> + .code = { MEDIA_BUS_FMT_SBGGR10_1X10 },
> .pixelformat = V4L2_PIX_FMT_SBGGR10,
> .bpp = 2,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGBRG10_1X10,
> + .code = { MEDIA_BUS_FMT_SGBRG10_1X10 },
> .pixelformat = V4L2_PIX_FMT_SGBRG10,
> .bpp = 2,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGRBG10_1X10,
> + .code = { MEDIA_BUS_FMT_SGRBG10_1X10 },
> .pixelformat = V4L2_PIX_FMT_SGRBG10,
> .bpp = 2,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SRGGB10_1X10,
> + .code = { MEDIA_BUS_FMT_SRGGB10_1X10 },
> .pixelformat = V4L2_PIX_FMT_SRGGB10,
> .bpp = 2,
> .bayer = true,
> @@ -89,25 +89,25 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
>
> /* 10bit raw bayer a-law compressed to 8 bits */
> {
> - .code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8,
> + .code = { MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8,
> + .code = { MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
> + .code = { MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8,
> + .code = { MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
> .bpp = 1,
> .bayer = true,
> @@ -115,49 +115,49 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
>
> /* 10bit raw bayer DPCM compressed to 8 bits */
> {
> - .code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
> + .code = { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
> + .code = { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
> + .code = { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
> + .code = { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8 },
> .pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
> .bpp = 1,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SBGGR12_1X12,
> + .code = { MEDIA_BUS_FMT_SBGGR12_1X12 },
> .pixelformat = V4L2_PIX_FMT_SBGGR12,
> .bpp = 2,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGBRG12_1X12,
> + .code = { MEDIA_BUS_FMT_SGBRG12_1X12 },
> .pixelformat = V4L2_PIX_FMT_SGBRG12,
> .bpp = 2,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SGRBG12_1X12,
> + .code = { MEDIA_BUS_FMT_SGRBG12_1X12 },
> .pixelformat = V4L2_PIX_FMT_SGRBG12,
> .bpp = 2,
> .bayer = true,
> },
> {
> - .code = MEDIA_BUS_FMT_SRGGB12_1X12,
> + .code = { MEDIA_BUS_FMT_SRGGB12_1X12 },
> .pixelformat = V4L2_PIX_FMT_SRGGB12,
> .bpp = 2,
> .bayer = true,
> @@ -182,13 +182,31 @@ const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i)
> return &vimc_pix_map_list[i];
> }
>
> +const u32 vimc_mbus_code_by_index(unsigned int index)
> +{
> + unsigned int i, j;
> +
> + for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
> + for (j = 0; j < ARRAY_SIZE(vimc_pix_map_list[i].code); j++) {
> + if (vimc_pix_map_list[i].code[j]) {

Can this be false?

> + if (!index)
> + return vimc_pix_map_list[i].code[j];
> + index--;
> + }
> + }
> + }
> + return 0;
> +}
> +
> const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
> {
> - unsigned int i;
> + unsigned int i, j;
>
> for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
> - if (vimc_pix_map_list[i].code == code)
> - return &vimc_pix_map_list[i];
> + for (j = 0; j < ARRAY_SIZE(vimc_pix_map_list[i].code); j++) {
> + if (vimc_pix_map_list[i].code[j] == code)
> + return &vimc_pix_map_list[i];
> + }
> }
> return NULL;
> }
> diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
> index 616d5a6b0754..585441694c86 100644
> --- a/drivers/media/platform/vimc/vimc-common.h
> +++ b/drivers/media/platform/vimc/vimc-common.h
> @@ -69,7 +69,7 @@ do { \
> * V4L2_PIX_FMT_* fourcc pixelformat and its bytes per pixel (bpp)
> */
> struct vimc_pix_map {
> - unsigned int code;
> + unsigned int code[1];
> unsigned int bpp;
> u32 pixelformat;
> bool bayer;
> @@ -172,6 +172,15 @@ void vimc_sen_release(struct vimc_ent_device *ved);
> */
> const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i);
>
> +/**
> + * vimc_mbus_code_by_index - get mbus code by its index
> + *
> + * @index: index of the mbus code in vimc_pix_map_list
> + *
> + * Returns 0 if no mbus code is found for the given index.
> + */
> +const u32 vimc_mbus_code_by_index(unsigned int index);
> +
> /**
> * vimc_pix_map_by_code - get vimc_pix_map struct by media bus code
> *
> diff --git a/drivers/media/platform/vimc/vimc-scaler.c b/drivers/media/platform/vimc/vimc-scaler.c
> index 7521439747c5..6bac1fa65a6f 100644
> --- a/drivers/media/platform/vimc/vimc-scaler.c
> +++ b/drivers/media/platform/vimc/vimc-scaler.c
> @@ -110,13 +110,19 @@ static int vimc_sca_enum_mbus_code(struct v4l2_subdev *sd,
> struct v4l2_subdev_pad_config *cfg,
> struct v4l2_subdev_mbus_code_enum *code)
> {
> - const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
> + const u32 mbus_code = vimc_mbus_code_by_index(code->index);
> + const struct vimc_pix_map *vpix;
> +
> + if (!mbus_code)
> + return -EINVAL;
> +
> + vpix = vimc_pix_map_by_code(mbus_code);
>
> /* We don't support bayer format */
> if (!vpix || vpix->bayer)
> return -EINVAL;
>
> - code->code = vpix->code;
> + code->code = mbus_code;

no need to change this.

>
> return 0;
> }
> diff --git a/drivers/media/platform/vimc/vimc-sensor.c b/drivers/media/platform/vimc/vimc-sensor.c
> index 92daee58209e..b8bd430809c1 100644
> --- a/drivers/media/platform/vimc/vimc-sensor.c
> +++ b/drivers/media/platform/vimc/vimc-sensor.c
> @@ -52,12 +52,12 @@ static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
> struct v4l2_subdev_pad_config *cfg,
> struct v4l2_subdev_mbus_code_enum *code)
> {
> - const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
> + const u32 mbus_code = vimc_mbus_code_by_index(code->index);
>
> - if (!vpix)
> + if (!mbus_code)
> return -EINVAL;
>
> - code->code = vpix->code;
> + code->code = mbus_code;
>
> return 0;
> }
>

With these changes

Acked-by: Helen Koike <helen.koike@collabora.com>

Regards,
Helen

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