diff mbox series

[01/10] media: Add P012 and P012M video format

Message ID dfaef3c8eb29108b1837a1959d598c8b0db63422.1671071730.git.ming.qian@nxp.com
State New
Headers
Series media: imx-jpeg: Add support for 12 bit extended |

Commit Message

Ming Qian Dec. 20, 2022, 3:11 a.m. UTC 
  P012 is a YUV format with 12-bits per component with interleaved UV,
like NV12, expanded to 16 bits.
Data in the 12 high bits, zeros in the 4 low bits,
arranged in little endian order.
And P012M has two non contiguous planes.

Signed-off-by: Ming Qian <ming.qian@nxp.com>
---
 .../media/v4l/pixfmt-yuv-planar.rst           | 94 +++++++++++++++++++
 drivers/media/v4l2-core/v4l2-common.c         |  2 +
 drivers/media/v4l2-core/v4l2-ioctl.c          |  2 +
 include/uapi/linux/videodev2.h                |  2 +
 4 files changed, 100 insertions(+)

Comments

Hans Verkuil Jan. 27, 2023, 2:31 p.m. UTC | #1 
On 20/12/2022 04:11, Ming Qian wrote:
> P012 is a YUV format with 12-bits per component with interleaved UV,
> like NV12, expanded to 16 bits.
> Data in the 12 high bits, zeros in the 4 low bits,
> arranged in little endian order.
> And P012M has two non contiguous planes.
> 
> Signed-off-by: Ming Qian <ming.qian@nxp.com>
> ---
>  .../media/v4l/pixfmt-yuv-planar.rst           | 94 +++++++++++++++++++
>  drivers/media/v4l2-core/v4l2-common.c         |  2 +
>  drivers/media/v4l2-core/v4l2-ioctl.c          |  2 +
>  include/uapi/linux/videodev2.h                |  2 +
>  4 files changed, 100 insertions(+)
> 
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index f1d5bb7b806d..aa37c3de8808 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -123,6 +123,20 @@ All components are stored with the same number of bits per component.
>        - Cb, Cr
>        - Yes
>        - 4x4 tiles
> +    * - V4L2_PIX_FMT_P012
> +      - 'P012'
> +      - 12
> +      - 4:2:0
> +      - Cb, Cr
> +      - Yes
> +      - Linear
> +    * - V4L2_PIX_FMT_P012M
> +      - 'PM12'
> +      - 12
> +      - 4:2:0
> +      - Cb, Cr
> +      - Yes
> +      - Linear
>      * - V4L2_PIX_FMT_NV16
>        - 'NV16'
>        - 8
> @@ -586,6 +600,86 @@ Data in the 10 high bits, zeros in the 6 low bits, arranged in little endian ord
>        - Cb\ :sub:`11`
>        - Cr\ :sub:`11`
>  
> +.. _V4L2-PIX-FMT-P012:
> +.. _V4L2-PIX-FMT-P012M:
> +
> +P012 and P012M
> +--------------
> +
> +P012 is like NV12 with 12 bits per component, expanded to 16 bits.
> +Data in the 12 high bits, zeros in the 4 low bits, arranged in little endian order.
> +
> +.. flat-table:: Sample 4x4 P012 Image
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - start + 0:
> +      - Y'\ :sub:`00`
> +      - Y'\ :sub:`01`
> +      - Y'\ :sub:`02`
> +      - Y'\ :sub:`03`
> +    * - start + 8:
> +      - Y'\ :sub:`10`
> +      - Y'\ :sub:`11`
> +      - Y'\ :sub:`12`
> +      - Y'\ :sub:`13`
> +    * - start + 16:
> +      - Y'\ :sub:`20`
> +      - Y'\ :sub:`21`
> +      - Y'\ :sub:`22`
> +      - Y'\ :sub:`23`
> +    * - start + 24:
> +      - Y'\ :sub:`30`
> +      - Y'\ :sub:`31`
> +      - Y'\ :sub:`32`
> +      - Y'\ :sub:`33`
> +    * - start + 32:
> +      - Cb\ :sub:`00`
> +      - Cr\ :sub:`00`
> +      - Cb\ :sub:`01`
> +      - Cr\ :sub:`01`
> +    * - start + 40:
> +      - Cb\ :sub:`10`
> +      - Cr\ :sub:`10`
> +      - Cb\ :sub:`11`
> +      - Cr\ :sub:`11`
> +
> +.. flat-table:: Sample 4x4 P012M Image
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - start0 + 0:
> +      - Y'\ :sub:`00`
> +      - Y'\ :sub:`01`
> +      - Y'\ :sub:`02`
> +      - Y'\ :sub:`03`
> +    * - start0 + 8:
> +      - Y'\ :sub:`10`
> +      - Y'\ :sub:`11`
> +      - Y'\ :sub:`12`
> +      - Y'\ :sub:`13`
> +    * - start0 + 16:
> +      - Y'\ :sub:`20`
> +      - Y'\ :sub:`21`
> +      - Y'\ :sub:`22`
> +      - Y'\ :sub:`23`
> +    * - start0 + 24:
> +      - Y'\ :sub:`30`
> +      - Y'\ :sub:`31`
> +      - Y'\ :sub:`32`
> +      - Y'\ :sub:`33`
> +    * -
> +    * - start1 + 0:
> +      - Cb\ :sub:`00`
> +      - Cr\ :sub:`00`
> +      - Cb\ :sub:`01`
> +      - Cr\ :sub:`01`
> +    * - start1 + 8:
> +      - Cb\ :sub:`10`
> +      - Cr\ :sub:`10`
> +      - Cb\ :sub:`11`
> +      - Cr\ :sub:`11`
> +
>  
>  Fully Planar YUV Formats
>  ========================
> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
> index 40f56e044640..a5e8ba370d33 100644
> --- a/drivers/media/v4l2-core/v4l2-common.c
> +++ b/drivers/media/v4l2-core/v4l2-common.c
> @@ -267,6 +267,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
>  		{ .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_P012,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .hdiv = 2, .vdiv = 2 },
>  
>  		{ .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 },
> @@ -292,6 +293,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
>  		{ .format = V4L2_PIX_FMT_NV21M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
>  		{ .format = V4L2_PIX_FMT_NV16M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
>  		{ .format = V4L2_PIX_FMT_NV61M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
> +		{ .format = V4L2_PIX_FMT_P012M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .hdiv = 2, .vdiv = 2 },
>  
>  		/* Bayer RGB formats */
>  		{ .format = V4L2_PIX_FMT_SBGGR8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 8e0a0ff62a70..067dbdd0a9ef 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1348,6 +1348,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>  	case V4L2_PIX_FMT_NV24:		descr = "Y/UV 4:4:4"; break;
>  	case V4L2_PIX_FMT_NV42:		descr = "Y/VU 4:4:4"; break;
>  	case V4L2_PIX_FMT_P010:		descr = "10-bit Y/UV 4:2:0"; break;
> +	case V4L2_PIX_FMT_P012:		descr = "12-bit Y/UV 4:2:0"; break;
>  	case V4L2_PIX_FMT_NV12_4L4:	descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
>  	case V4L2_PIX_FMT_NV12_16L16:	descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
>  	case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
> @@ -1358,6 +1359,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>  	case V4L2_PIX_FMT_NV61M:	descr = "Y/VU 4:2:2 (N-C)"; break;
>  	case V4L2_PIX_FMT_NV12MT:	descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
>  	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
> +	case V4L2_PIX_FMT_P012M:	descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
>  	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
>  	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
>  	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 1befd181a4cc..5448aa3b7858 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -626,12 +626,14 @@ 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_P010    v4l2_fourcc('P', '0', '1', '0') /* 24  Y/CbCr 4:2:0 10-bit per component */
> +#define V4L2_PIX_FMT_P012    v4l2_fourcc('P', '0', '1', '2') /* 24  Y/CbCr 4:2:0 12-bit per component */
>  
>  /* 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  */
>  #define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21  Y/CrCb 4:2:0  */
>  #define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16  Y/CbCr 4:2:2  */
>  #define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16  Y/CrCb 4:2:2  */
> +#define V4L2_PIX_FMT_P012M   v4l2_fourcc('P', 'M', '1', '2') /* 24  Y/CbCr 4:2:0 12-bit per component */

The name of the V4L2_PIX_FMT_ defines in this series are hard to decode.

In this case is it derived from V4L2_PIX_FMT_P010, which really should have been
named differently, but it's too late now :-(

So I guess we'll stick with this naming, but it's not obvious what 'P012' means
without referring to documentation.

Oh well.

Regards,

	Hans

>  
>  /* three planes - Y Cb, Cr */
>  #define V4L2_PIX_FMT_YUV410  v4l2_fourcc('Y', 'U', 'V', '9') /*  9  YUV 4:1:0     */
Ming Qian Jan. 30, 2023, 8:15 a.m. UTC | #2 
>From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
>Sent: 2023年1月27日 22:32
>To: Ming Qian <ming.qian@nxp.com>; mchehab@kernel.org; Mirela Rabulea
>(OSS) <mirela.rabulea@oss.nxp.com>
>Cc: shawnguo@kernel.org; s.hauer@pengutronix.de; kernel@pengutronix.de;
>festevam@gmail.com; X.H. Bao <xiahong.bao@nxp.com>; dl-linux-imx <linux-
>imx@nxp.com>; linux-media@vger.kernel.org; linux-kernel@vger.kernel.org;
>devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org
>Subject: [EXT] Re: [PATCH 01/10] media: Add P012 and P012M video format
>
>Caution: EXT Email
>
>On 20/12/2022 04:11, Ming Qian wrote:
>> P012 is a YUV format with 12-bits per component with interleaved UV,
>> like NV12, expanded to 16 bits.
>> Data in the 12 high bits, zeros in the 4 low bits, arranged in little
>> endian order.
>> And P012M has two non contiguous planes.
>>
>> Signed-off-by: Ming Qian <ming.qian@nxp.com>
>> ---
>>  .../media/v4l/pixfmt-yuv-planar.rst           | 94 +++++++++++++++++++
>>  drivers/media/v4l2-core/v4l2-common.c         |  2 +
>>  drivers/media/v4l2-core/v4l2-ioctl.c          |  2 +
>>  include/uapi/linux/videodev2.h                |  2 +
>>  4 files changed, 100 insertions(+)
>>
>> diff --git
>> a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
>> b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
>> index f1d5bb7b806d..aa37c3de8808 100644
>> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
>> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
>> @@ -123,6 +123,20 @@ All components are stored with the same number
>of bits per component.
>>        - Cb, Cr
>>        - Yes
>>        - 4x4 tiles
>> +    * - V4L2_PIX_FMT_P012
>> +      - 'P012'
>> +      - 12
>> +      - 4:2:0
>> +      - Cb, Cr
>> +      - Yes
>> +      - Linear
>> +    * - V4L2_PIX_FMT_P012M
>> +      - 'PM12'
>> +      - 12
>> +      - 4:2:0
>> +      - Cb, Cr
>> +      - Yes
>> +      - Linear
>>      * - V4L2_PIX_FMT_NV16
>>        - 'NV16'
>>        - 8
>> @@ -586,6 +600,86 @@ Data in the 10 high bits, zeros in the 6 low bits,
>arranged in little endian ord
>>        - Cb\ :sub:`11`
>>        - Cr\ :sub:`11`
>>
>> +.. _V4L2-PIX-FMT-P012:
>> +.. _V4L2-PIX-FMT-P012M:
>> +
>> +P012 and P012M
>> +--------------
>> +
>> +P012 is like NV12 with 12 bits per component, expanded to 16 bits.
>> +Data in the 12 high bits, zeros in the 4 low bits, arranged in little endian
>order.
>> +
>> +.. flat-table:: Sample 4x4 P012 Image
>> +    :header-rows:  0
>> +    :stub-columns: 0
>> +
>> +    * - start + 0:
>> +      - Y'\ :sub:`00`
>> +      - Y'\ :sub:`01`
>> +      - Y'\ :sub:`02`
>> +      - Y'\ :sub:`03`
>> +    * - start + 8:
>> +      - Y'\ :sub:`10`
>> +      - Y'\ :sub:`11`
>> +      - Y'\ :sub:`12`
>> +      - Y'\ :sub:`13`
>> +    * - start + 16:
>> +      - Y'\ :sub:`20`
>> +      - Y'\ :sub:`21`
>> +      - Y'\ :sub:`22`
>> +      - Y'\ :sub:`23`
>> +    * - start + 24:
>> +      - Y'\ :sub:`30`
>> +      - Y'\ :sub:`31`
>> +      - Y'\ :sub:`32`
>> +      - Y'\ :sub:`33`
>> +    * - start + 32:
>> +      - Cb\ :sub:`00`
>> +      - Cr\ :sub:`00`
>> +      - Cb\ :sub:`01`
>> +      - Cr\ :sub:`01`
>> +    * - start + 40:
>> +      - Cb\ :sub:`10`
>> +      - Cr\ :sub:`10`
>> +      - Cb\ :sub:`11`
>> +      - Cr\ :sub:`11`
>> +
>> +.. flat-table:: Sample 4x4 P012M Image
>> +    :header-rows:  0
>> +    :stub-columns: 0
>> +
>> +    * - start0 + 0:
>> +      - Y'\ :sub:`00`
>> +      - Y'\ :sub:`01`
>> +      - Y'\ :sub:`02`
>> +      - Y'\ :sub:`03`
>> +    * - start0 + 8:
>> +      - Y'\ :sub:`10`
>> +      - Y'\ :sub:`11`
>> +      - Y'\ :sub:`12`
>> +      - Y'\ :sub:`13`
>> +    * - start0 + 16:
>> +      - Y'\ :sub:`20`
>> +      - Y'\ :sub:`21`
>> +      - Y'\ :sub:`22`
>> +      - Y'\ :sub:`23`
>> +    * - start0 + 24:
>> +      - Y'\ :sub:`30`
>> +      - Y'\ :sub:`31`
>> +      - Y'\ :sub:`32`
>> +      - Y'\ :sub:`33`
>> +    * -
>> +    * - start1 + 0:
>> +      - Cb\ :sub:`00`
>> +      - Cr\ :sub:`00`
>> +      - Cb\ :sub:`01`
>> +      - Cr\ :sub:`01`
>> +    * - start1 + 8:
>> +      - Cb\ :sub:`10`
>> +      - Cr\ :sub:`10`
>> +      - Cb\ :sub:`11`
>> +      - Cr\ :sub:`11`
>> +
>>
>>  Fully Planar YUV Formats
>>  ========================
>> diff --git a/drivers/media/v4l2-core/v4l2-common.c
>> b/drivers/media/v4l2-core/v4l2-common.c
>> index 40f56e044640..a5e8ba370d33 100644
>> --- a/drivers/media/v4l2-core/v4l2-common.c
>> +++ b/drivers/media/v4l2-core/v4l2-common.c
>> @@ -267,6 +267,7 @@ const struct v4l2_format_info
>*v4l2_format_info(u32 format)
>>               { .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_P012,    .pixel_enc =
>V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0,
>0 }, .hdiv = 2, .vdiv = 2 },
>>
>>               { .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 }, @@ -292,6 +293,7 @@ const struct v4l2_format_info
>*v4l2_format_info(u32 format)
>>               { .format = V4L2_PIX_FMT_NV21M,   .pixel_enc =
>V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0,
>0 }, .hdiv = 2, .vdiv = 2 },
>>               { .format = V4L2_PIX_FMT_NV16M,   .pixel_enc =
>V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0,
>0 }, .hdiv = 2, .vdiv = 1 },
>>               { .format = V4L2_PIX_FMT_NV61M,   .pixel_enc =
>V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0,
>0 }, .hdiv = 2, .vdiv = 1 },
>> +             { .format = V4L2_PIX_FMT_P012M,   .pixel_enc =
>V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 2, 4, 0,
>0 }, .hdiv = 2, .vdiv = 2 },
>>
>>               /* Bayer RGB formats */
>>               { .format = V4L2_PIX_FMT_SBGGR8,        .pixel_enc =
>V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0,
>0 }, .hdiv = 1, .vdiv = 1 },
>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
>> b/drivers/media/v4l2-core/v4l2-ioctl.c
>> index 8e0a0ff62a70..067dbdd0a9ef 100644
>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>> @@ -1348,6 +1348,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc
>*fmt)
>>       case V4L2_PIX_FMT_NV24:         descr = "Y/UV 4:4:4"; break;
>>       case V4L2_PIX_FMT_NV42:         descr = "Y/VU 4:4:4"; break;
>>       case V4L2_PIX_FMT_P010:         descr = "10-bit Y/UV 4:2:0"; break;
>> +     case V4L2_PIX_FMT_P012:         descr = "12-bit Y/UV 4:2:0"; break;
>>       case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/UV 4:2:0 (4x4 Linear)";
>break;
>>       case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/UV 4:2:0 (16x16 Linear)";
>break;
>>       case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)";
>break;
>> @@ -1358,6 +1359,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc
>*fmt)
>>       case V4L2_PIX_FMT_NV61M:        descr = "Y/VU 4:2:2 (N-C)"; break;
>>       case V4L2_PIX_FMT_NV12MT:       descr = "Y/UV 4:2:0 (64x32 MB, N-C)";
>break;
>>       case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB,
>> N-C)"; break;
>> +     case V4L2_PIX_FMT_P012M:        descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
>>       case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)";
>break;
>>       case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)";
>break;
>>       case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)";
>break;
>> diff --git a/include/uapi/linux/videodev2.h
>> b/include/uapi/linux/videodev2.h index 1befd181a4cc..5448aa3b7858
>> 100644
>> --- a/include/uapi/linux/videodev2.h
>> +++ b/include/uapi/linux/videodev2.h
>> @@ -626,12 +626,14 @@ 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_P010    v4l2_fourcc('P', '0', '1', '0') /* 24  Y/CbCr
>4:2:0 10-bit per component */
>> +#define V4L2_PIX_FMT_P012    v4l2_fourcc('P', '0', '1', '2') /* 24  Y/CbCr
>4:2:0 12-bit per component */
>>
>>  /* 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  */
>>  #define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21  Y/CrCb
>4:2:0  */
>>  #define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16  Y/CbCr
>4:2:2  */
>>  #define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16  Y/CrCb
>4:2:2  */
>> +#define V4L2_PIX_FMT_P012M   v4l2_fourcc('P', 'M', '1', '2') /* 24  Y/CbCr
>4:2:0 12-bit per component */
>
>The name of the V4L2_PIX_FMT_ defines in this series are hard to decode.
>
>In this case is it derived from V4L2_PIX_FMT_P010, which really should have
>been named differently, but it's too late now :-(
>
>So I guess we'll stick with this naming, but it's not obvious what 'P012' means
>without referring to documentation.
>
>Oh well.
>
>Regards,
>
>        Hans

Hi Hans,
    I'll update the format name, as you know,  the P012 is following the P010, as they are almost the same, and the Y212 comes from gstreamer (GST_VIDEO_FORMAT_Y212_LE), then I did some naming like that.
    I'll correct them in v2 patch.

Ming

>
>>
>>  /* three planes - Y Cb, Cr */
>>  #define V4L2_PIX_FMT_YUV410  v4l2_fourcc('Y', 'U', 'V', '9') /*  9  YUV 4:1:0
>*/
Nicolas Dufresne Feb. 10, 2023, 3:08 p.m. UTC | #3 
Le lundi 30 janvier 2023 à 08:15 +0000, Ming Qian a écrit :
> > > diff --git a/include/uapi/linux/videodev2.h
> > > b/include/uapi/linux/videodev2.h index 1befd181a4cc..5448aa3b7858
> > > 100644
> > > --- a/include/uapi/linux/videodev2.h
> > > +++ b/include/uapi/linux/videodev2.h
> > > @@ -626,12 +626,14 @@ 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_P010    v4l2_fourcc('P', '0', '1', '0') /* 24 
> > > Y/CbCr
> > 4:2:0 10-bit per component */
> > > +#define V4L2_PIX_FMT_P012    v4l2_fourcc('P', '0', '1', '2') /* 24 
> > > Y/CbCr
> > 4:2:0 12-bit per component */
> > > 
> > >   /* 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  */
> > >   #define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21 
> > > Y/CrCb
> > 4:2:0  */
> > >   #define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16 
> > > Y/CbCr
> > 4:2:2  */
> > >   #define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16 
> > > Y/CrCb
> > 4:2:2  */
> > > +#define V4L2_PIX_FMT_P012M   v4l2_fourcc('P', 'M', '1', '2') /* 24 
> > > Y/CbCr
> > 4:2:0 12-bit per component */
> > 
> > The name of the V4L2_PIX_FMT_ defines in this series are hard to decode.
> > 
> > In this case is it derived from V4L2_PIX_FMT_P010, which really should have
> > been named differently, but it's too late now :-(
> > 
> > So I guess we'll stick with this naming, but it's not obvious what 'P012'
> > means
> > without referring to documentation.
> > 
> > Oh well.
> > 
> > Regards,
> > 
> >         Hans
> 
> Hi Hans,
>     I'll update the format name, as you know,  the P012 is following the P010,
> as they are almost the same, and the Y212 comes from gstreamer
> (GST_VIDEO_FORMAT_Y212_LE), then I did some naming like that.
>     I'll correct them in v2 patch.

I agree these naming are not obvious. In GStreamer, appart from the _LE part,
we've had this historical tendency to just stick with Microsoft names when they
exist. Though Microsoft only define 10 and 16bits (P010/P016, Y210 and Y216). In
this case, the 12 has is derived from it.

https://learn.microsoft.com/en-us/windows/win32/medfound/10-bit-and-16-bit-yuv-video-formats

While P010 is very commonly seen, I don't know if Y210/Y212/Y216 is a great
idea. It is a 16bit component width version of YUYV, which as we know exist in
all sort of swizzling. So the Microsoft name will be hard to extend to other
component order. My argument of keeping it this way though is that it matches
the other copy of pixel formats definition that exist in Linux, which is
drm_fourcc.h.

Nicolas
Ming Qian Feb. 13, 2023, 9:16 a.m. UTC | #4 
>From: Nicolas Dufresne <nicolas@ndufresne.ca>
>Sent: 2023年2月10日 23:08
>To: Ming Qian <ming.qian@nxp.com>; Hans Verkuil <hverkuil-
>cisco@xs4all.nl>; mchehab@kernel.org; Mirela Rabulea (OSS)
><mirela.rabulea@oss.nxp.com>
>Cc: shawnguo@kernel.org; s.hauer@pengutronix.de; kernel@pengutronix.de;
>festevam@gmail.com; X.H. Bao <xiahong.bao@nxp.com>; dl-linux-imx <linux-
>imx@nxp.com>; linux-media@vger.kernel.org; linux-kernel@vger.kernel.org;
>devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org
>Subject: Re: [EXT] Re: [PATCH 01/10] media: Add P012 and P012M video
>format
>
>Caution: EXT Email
>
>Le lundi 30 janvier 2023 à 08:15 +0000, Ming Qian a écrit :
>> > > diff --git a/include/uapi/linux/videodev2.h
>> > > b/include/uapi/linux/videodev2.h index 1befd181a4cc..5448aa3b7858
>> > > 100644
>> > > --- a/include/uapi/linux/videodev2.h
>> > > +++ b/include/uapi/linux/videodev2.h
>> > > @@ -626,12 +626,14 @@ 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_P010    v4l2_fourcc('P', '0', '1', '0') /* 24
>> > > Y/CbCr
>> > 4:2:0 10-bit per component */
>> > > +#define V4L2_PIX_FMT_P012    v4l2_fourcc('P', '0', '1', '2') /* 24
>> > > Y/CbCr
>> > 4:2:0 12-bit per component */
>> > >
>> > >   /* 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  */
>> > >   #define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21
>> > > Y/CrCb
>> > 4:2:0  */
>> > >   #define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16
>> > > Y/CbCr
>> > 4:2:2  */
>> > >   #define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16
>> > > Y/CrCb
>> > 4:2:2  */
>> > > +#define V4L2_PIX_FMT_P012M   v4l2_fourcc('P', 'M', '1', '2') /* 24
>> > > Y/CbCr
>> > 4:2:0 12-bit per component */
>> >
>> > The name of the V4L2_PIX_FMT_ defines in this series are hard to decode.
>> >
>> > In this case is it derived from V4L2_PIX_FMT_P010, which really
>> > should have been named differently, but it's too late now :-(
>> >
>> > So I guess we'll stick with this naming, but it's not obvious what 'P012'
>> > means
>> > without referring to documentation.
>> >
>> > Oh well.
>> >
>> > Regards,
>> >
>> >         Hans
>>
>> Hi Hans,
>>     I'll update the format name, as you know,  the P012 is following
>> the P010, as they are almost the same, and the Y212 comes from
>> gstreamer (GST_VIDEO_FORMAT_Y212_LE), then I did some naming like that.
>>     I'll correct them in v2 patch.
>
>I agree these naming are not obvious. In GStreamer, appart from the _LE part,
>we've had this historical tendency to just stick with Microsoft names when
>they exist. Though Microsoft only define 10 and 16bits (P010/P016, Y210 and
>Y216). In this case, the 12 has is derived from it.
>
>https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flearn.
>microsoft.com%2Fen-us%2Fwindows%2Fwin32%2Fmedfound%2F10-bit-and-
>16-bit-yuv-video-
>formats&data=05%7C01%7Cming.qian%40nxp.com%7C4946d98325684a554d
>a408db0b78aa3a%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638
>116385106384698%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL
>CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sd
>ata=5Z6m1WVxmf6WYXRDZiUuKT9wjx7cOtt%2BRMHzlyT3n5E%3D&reserved=
>0
>
>While P010 is very commonly seen, I don't know if Y210/Y212/Y216 is a great
>idea. It is a 16bit component width version of YUYV, which as we know exist in
>all sort of swizzling. So the Microsoft name will be hard to extend to other
>component order. My argument of keeping it this way though is that it
>matches the other copy of pixel formats definition that exist in Linux, which is
>drm_fourcc.h.
>
>Nicolas

Hi Nicolas,
    Thanks for your comments, I agree with you that the name like Y212 is hard to understand,
I'll correct them to YUYV64_12,  YUV48_12, BGR48_12 and ABGR64_12, but for P012, I prefer to keep it.

Ming
diff mbox series

Patch

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
index f1d5bb7b806d..aa37c3de8808 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
@@ -123,6 +123,20 @@  All components are stored with the same number of bits per component.
       - Cb, Cr
       - Yes
       - 4x4 tiles
+    * - V4L2_PIX_FMT_P012
+      - 'P012'
+      - 12
+      - 4:2:0
+      - Cb, Cr
+      - Yes
+      - Linear
+    * - V4L2_PIX_FMT_P012M
+      - 'PM12'
+      - 12
+      - 4:2:0
+      - Cb, Cr
+      - Yes
+      - Linear
     * - V4L2_PIX_FMT_NV16
       - 'NV16'
       - 8
@@ -586,6 +600,86 @@  Data in the 10 high bits, zeros in the 6 low bits, arranged in little endian ord
       - Cb\ :sub:`11`
       - Cr\ :sub:`11`
 
+.. _V4L2-PIX-FMT-P012:
+.. _V4L2-PIX-FMT-P012M:
+
+P012 and P012M
+--------------
+
+P012 is like NV12 with 12 bits per component, expanded to 16 bits.
+Data in the 12 high bits, zeros in the 4 low bits, arranged in little endian order.
+
+.. flat-table:: Sample 4x4 P012 Image
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 8:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 16:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 24:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 32:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start + 40:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+
+.. flat-table:: Sample 4x4 P012M Image
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start0 + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start0 + 8:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start0 + 16:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start0 + 24:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * -
+    * - start1 + 0:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start1 + 8:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+
 
 Fully Planar YUV Formats
 ========================
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 40f56e044640..a5e8ba370d33 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -267,6 +267,7 @@  const struct v4l2_format_info *v4l2_format_info(u32 format)
 		{ .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_P012,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 
 		{ .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 },
@@ -292,6 +293,7 @@  const struct v4l2_format_info *v4l2_format_info(u32 format)
 		{ .format = V4L2_PIX_FMT_NV21M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 		{ .format = V4L2_PIX_FMT_NV16M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 		{ .format = V4L2_PIX_FMT_NV61M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_P012M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 
 		/* Bayer RGB formats */
 		{ .format = V4L2_PIX_FMT_SBGGR8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 8e0a0ff62a70..067dbdd0a9ef 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1348,6 +1348,7 @@  static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	case V4L2_PIX_FMT_NV24:		descr = "Y/UV 4:4:4"; break;
 	case V4L2_PIX_FMT_NV42:		descr = "Y/VU 4:4:4"; break;
 	case V4L2_PIX_FMT_P010:		descr = "10-bit Y/UV 4:2:0"; break;
+	case V4L2_PIX_FMT_P012:		descr = "12-bit Y/UV 4:2:0"; break;
 	case V4L2_PIX_FMT_NV12_4L4:	descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
 	case V4L2_PIX_FMT_NV12_16L16:	descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
 	case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
@@ -1358,6 +1359,7 @@  static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	case V4L2_PIX_FMT_NV61M:	descr = "Y/VU 4:2:2 (N-C)"; break;
 	case V4L2_PIX_FMT_NV12MT:	descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
 	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
+	case V4L2_PIX_FMT_P012M:	descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
 	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
 	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
 	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 1befd181a4cc..5448aa3b7858 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -626,12 +626,14 @@  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_P010    v4l2_fourcc('P', '0', '1', '0') /* 24  Y/CbCr 4:2:0 10-bit per component */
+#define V4L2_PIX_FMT_P012    v4l2_fourcc('P', '0', '1', '2') /* 24  Y/CbCr 4:2:0 12-bit per component */
 
 /* 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  */
 #define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21  Y/CrCb 4:2:0  */
 #define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16  Y/CbCr 4:2:2  */
 #define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16  Y/CrCb 4:2:2  */
+#define V4L2_PIX_FMT_P012M   v4l2_fourcc('P', 'M', '1', '2') /* 24  Y/CbCr 4:2:0 12-bit per component */
 
 /* three planes - Y Cb, Cr */
 #define V4L2_PIX_FMT_YUV410  v4l2_fourcc('Y', 'U', 'V', '9') /*  9  YUV 4:1:0     */