Re: [PATCH] media: Add P010 video format

From: Ezequiel Garcia
Date: Mon Apr 04 2022 - 17:51:32 EST

On Mon, Apr 04, 2022 at 11:01:16AM +0200, Benjamin Gaignard wrote:
> P010 is a YUV format with 10-bits per pixel with interleaved UV.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
> Acked-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>

Reviewed-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>

> ---
> Note that P010 is already known in GStreamer, only the mapping with
> v4l2 pixel format is missing.
>
> This patch has been acked in this series but never merged:
> https://patchwork.kernel.org/project/linux-rockchip/patch/20210618131526.566762-5-benjamin.gaignard@xxxxxxxxxxxxx/
> After rebased it on v5.18-rc1, resend in standalone mode.
>
> .../media/v4l/pixfmt-yuv-planar.rst | 76 +++++++++++++++++++
> drivers/media/v4l2-core/v4l2-common.c | 1 +
> drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
> include/uapi/linux/videodev2.h | 1 +
> 4 files changed, 79 insertions(+)
>
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index 8dff5906639b..6d65c8ac44f0 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -102,6 +102,13 @@ All components are stored with the same number of bits per component.
> - 64x32 tiles
>
> Horizontal Z order
> + * - V4L2_PIX_FMT_P010
> + - 'P010'
> + - 16
> + - 4:2:0
> + - Cb, Cr
> + - No
> + - Linear
> * - V4L2_PIX_FMT_NV12MT_16X16
> - 'VM12'
> - 8
> @@ -171,6 +178,7 @@ horizontally.
> .. _V4L2-PIX-FMT-NV21:
> .. _V4L2-PIX-FMT-NV12M:
> .. _V4L2-PIX-FMT-NV21M:
> +.. _V4L2-PIX-FMT-P010:
>
> NV12, NV21, NV12M and NV21M
> ---------------------------
> @@ -519,6 +527,74 @@ number of lines as the luma plane.
> - Cb\ :sub:`33`
> - Cr\ :sub:`33`
>
> +.. _V4L2_PIX_FMT_P010:
> +
> +P010
> +----
> +
> +The number of bytes in one luminance row must be divisible by 16,
> +which means there will be padded 0 in the right edge when necessary.
> +
> +.. raw:: latex
> +
> + \begingroup
> + \small
> + \setlength{\tabcolsep}{2pt}
> +
> +.. tabularcolumns:: |p{2.6cm}|p{0.70cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
> +
> +.. flat-table:: P010 16 Bits per component
> + :header-rows: 2
> + :stub-columns: 0
> +
> + * - Identifier
> + - Code
> + - :cspan:`7` Byte 0 in memory
> +
> + - :cspan:`7` Byte 1
> + * -
> + -
> + - 7
> + - 6
> + - 5
> + - 4
> + - 3
> + - 2
> + - 1
> + - 0
> +
> + - 7
> + - 6
> + - 5
> + - 4
> + - 3
> + - 2
> + - 1
> + - 0
> + * - ``V4L2_PIX_FMT_P010``
> + - 'P010'
> +
> + - Y\ :sub:`9`
> + - Y\ :sub:`8`
> + - Y\ :sub:`7`
> + - Y\ :sub:`6`
> + - Y\ :sub:`5`
> + - Y\ :sub:`4`
> + - Y\ :sub:`3`
> + - Y\ :sub:`2`
> +
> + - Y\ :sub:`1`
> + - Y\ :sub:`0`
> + - 0
> + - 0
> + - 0
> + - 0
> + - 0
> + - 0
> +
> +.. raw:: latex
> +
> + \endgroup
>
> Fully Planar YUV Formats
> ========================
> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
> index df34b2a283bc..1e38ad8906a2 100644
> --- a/drivers/media/v4l2-core/v4l2-common.c
> +++ b/drivers/media/v4l2-core/v4l2-common.c
> @@ -266,6 +266,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
> { .format = V4L2_PIX_FMT_NV61, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
> { .format = V4L2_PIX_FMT_NV24, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
> { .format = V4L2_PIX_FMT_NV42, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
> + { .format = V4L2_PIX_FMT_P010, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
>
> { .format = V4L2_PIX_FMT_YUV410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
> { .format = V4L2_PIX_FMT_YVU410, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 96e307fe3aab..e14d7e1a038e 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1301,6 +1301,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
> case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
> case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
> + case V4L2_PIX_FMT_P010: descr = "10-bit Y/CrCb 4:2:0"; break;
> case V4L2_PIX_FMT_NV12_4L4: descr = "Y/CbCr 4:2:0 (4x4 Linear)"; break;
> case V4L2_PIX_FMT_NV12_16L16: descr = "Y/CbCr 4:2:0 (16x16 Linear)"; break;
> case V4L2_PIX_FMT_NV12_32L32: descr = "Y/CbCr 4:2:0 (32x32 Linear)"; break;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 4c09969e7112..2e451c454db3 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -601,6 +601,7 @@ struct v4l2_pix_format {
> #define V4L2_PIX_FMT_NV61 v4l2_fourcc('N', 'V', '6', '1') /* 16 Y/CrCb 4:2:2 */
> #define V4L2_PIX_FMT_NV24 v4l2_fourcc('N', 'V', '2', '4') /* 24 Y/CbCr 4:4:4 */
> #define V4L2_PIX_FMT_NV42 v4l2_fourcc('N', 'V', '4', '2') /* 24 Y/CrCb 4:4:4 */
> +#define V4L2_PIX_FMT_P010 v4l2_fourcc('P', '0', '1', '0') /* 15 Y/CbCr 4:2:0 10-bit per pixel*/
>
> /* two non contiguous planes - one Y, one Cr + Cb interleaved */
> #define V4L2_PIX_FMT_NV12M v4l2_fourcc('N', 'M', '1', '2') /* 12 Y/CbCr 4:2:0 */
> --
> 2.32.0
>