[PATCH v4 4/9] media: Add P010 video format
Sven Püschel
s.pueschel at pengutronix.de
Wed Mar 25 07:34:49 PDT 2026
Hi Benjamin,
On 6/25/21 4:11 PM, Benjamin Gaignard wrote:
> P010 is a YUV format with 10-bits per pixel with interleaved UV.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard at collabora.com>
> ---
> Note that P010 is already known in GStreamer, only the mapping with
> v4l2 pixel format is missing.
>
> version 2:
> - Add documentation about P010 padding
> - Fix the number of bits per component (16)
>
> .../media/v4l/pixfmt-yuv-planar.rst | 78 ++++++++++++++++++-
> 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(+), 2 deletions(-)
>
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index 090c091affd2..af400d37c8fd 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -100,8 +100,13 @@ All components are stored with the same number of bits per component.
> - Cb, Cr
> - No
> - 64x32 macroblocks
> -
> - 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 +176,7 @@ horizontally.
> .. _V4L2-PIX-FMT-NV21:
> .. _V4L2-PIX-FMT-NV12M:
> .. _V4L2-PIX-FMT-NV21M:
> +.. _V4L2-PIX-FMT-P010:
>
> NV12, NV21, NV12M and NV21M
> ---------------------------
> @@ -470,6 +476,74 @@ 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 04af03285a20..37b5d82359dd 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 },
Just stumbled on this. Shouldn't the bpp be 2, 4 (instead of 2,2) and
the vdiv also 2, given that it's basically NV12 with 10bit data
contained in 16bit values [1]? Or did I miss something?
[1]
https://docs.kernel.org/userspace-api/media/v4l/pixfmt-yuv-planar.html#p010-and-tiled-p010
Sincerely
Sven
>
> { .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 05d5db3d85e5..0044987a727a 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1282,6 +1282,7 @@ 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_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
> case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
> case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 9260791b8438..e5f7acde0730 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -602,6 +602,7 @@ struct v4l2_pix_format {
> #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_HM12 v4l2_fourcc('H', 'M', '1', '2') /* 8 YUV 4:2:0 16x16 macroblocks */
> +#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 */
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