linux-kernel - Re: [PATCH v4 1/4] media: add nv12_8l128 and nv12_10be

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Date:   Thu, 11 Aug 2022 17:18:53 +0200
From:   Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
To:     Ming Qian <ming.qian@....com>
Cc:     mchehab@...nel.org, hverkuil-cisco@...all.nl, shawnguo@...nel.org,
        robh+dt@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, xiahong.bao@....com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 1/4] media: add nv12_8l128 and nv12_10be_8l128 video
 format.

Hi Ming,

On Tue, Aug 09, 2022 at 02:50:38PM +0800, Ming Qian wrote:
> add contiguous nv12 tiled format nv12_8l128 and nv12_10be_8l128
> 
> Signed-off-by: Ming Qian <ming.qian@....com>
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
> ---
>  .../userspace-api/media/v4l/pixfmt-yuv-planar.rst         | 8 ++++++++
>  drivers/media/v4l2-core/v4l2-ioctl.c                      | 2 ++
>  include/uapi/linux/videodev2.h                            | 2 ++
>  3 files changed, 12 insertions(+)
> 
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index 10b1feeb0b57..f1d5bb7b806d 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -273,7 +273,9 @@ of the luma plane.
>  .. _V4L2-PIX-FMT-NV12-16L16:
>  .. _V4L2-PIX-FMT-NV12-32L32:
>  .. _V4L2-PIX-FMT-NV12M-8L128:
> +.. _V4L2-PIX-FMT-NV12-8L128:
>  .. _V4L2-PIX-FMT-NV12M-10BE-8L128:
> +.. _V4L2-PIX-FMT-NV12-10BE-8L128:
>  .. _V4L2-PIX-FMT-MM21:
>  
>  Tiled NV12
> @@ -319,6 +321,9 @@ pixels in 2D 8x128 tiles, and stores tiles linearly in memory.
>  The image height must be aligned to a multiple of 128.
>  The layouts of the luma and chroma planes are identical.
>  
> +``V4L2_PIX_FMT_NV12_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_8L128`` but stores
> +two planes in one memory.
> +

Don't know, maybe we need more details here?

>  ``V4L2_PIX_FMT_NV12M_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M`` but stores
>  10 bits pixels in 2D 8x128 tiles, and stores tiles linearly in memory.
>  the data is arranged in big endian order.
> @@ -334,6 +339,9 @@ byte 2: Y1(bits 3-0) Y2(bits 9-6)
>  byte 3: Y2(bits 5-0) Y3(bits 9-8)
>  byte 4: Y3(bits 7-0)
>  
> +``V4L2_PIX_FMT_NV12_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_10BE_8L128`` but stores
> +two planes in one memory.
> +

here also?

>  ``V4L2_PIX_FMT_MM21`` store luma pixel in 16x32 tiles, and chroma pixels
>  in 16x16 tiles. The line stride must be aligned to a multiple of 16 and the
>  image height must be aligned to a multiple of 32. The number of luma and chroma
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index c314025d977e..d973bd2ff750 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1444,7 +1444,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>  	case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
>  	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A Parameters"; break;
>  	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A Statistics"; break;
> +	case V4L2_PIX_FMT_NV12_8L128:	descr = "NV12 (8x128 Linear)"; break;
>  	case V4L2_PIX_FMT_NV12M_8L128:	descr = "NV12M (8x128 Linear)"; break;
> +	case V4L2_PIX_FMT_NV12_10BE_8L128:	descr = "10-bit NV12 (8x128 Linear, BE)"; break;
>  	case V4L2_PIX_FMT_NV12M_10BE_8L128:	descr = "10-bit NV12M (8x128 Linear, BE)"; break;
>  
>  	default:
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index cd66e01ed3c3..64f16490dd2b 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -655,6 +655,8 @@ struct v4l2_pix_format {
>  #define V4L2_PIX_FMT_NV12_16L16 v4l2_fourcc('H', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 16x16 tiles */
>  #define V4L2_PIX_FMT_NV12_32L32 v4l2_fourcc('S', 'T', '1', '2') /* 12  Y/CbCr 4:2:0 32x32 tiles */
>  #define V4L2_PIX_FMT_P010_4L4 v4l2_fourcc('T', '0', '1', '0') /* 12  Y/CbCr 4:2:0 10-bit 4x4 macroblocks */
> +#define V4L2_PIX_FMT_NV12_8L128       v4l2_fourcc('A', 'T', '1', '2') /* Y/CbCr 4:2:0 8x128 tiles */
> +#define V4L2_PIX_FMT_NV12_10BE_8L128  v4l2_fourcc_be('A', 'X', '1', '2') /* Y/CbCr 4:2:0 10-bit 8x128 tiles */
>  
>  /* Tiled YUV formats, non contiguous planes */
>  #define V4L2_PIX_FMT_NV12MT  v4l2_fourcc('T', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 64x32 tiles */
> -- 
> 2.37.1
> 

For the other parts look's good to me.
Reviewed-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.com>

Regards,
Tommaso

-- 
Tommaso Merciai
Embedded Linux Engineer
tommaso.merciai@...rulasolutions.com
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