Le mercredi 13 avril 2016 à 20:01 +0800, Tiffany Lin a écrit :
> From: Daniel Kurtz <[email protected]>
>
> Mediatek video format is YVU8_420_2PLANE_PACK8_PROGRESSIVE.
>
> Create V4L2_PIX_FMT_MT21 and DRM_FORMAT_MT21 to be consistent with
> V4L2_PIX_FMT_NV12 notation.
>
> Signed-off-by: Tiffany Lin <[email protected]>
> ---
> include/uapi/drm/drm_fourcc.h | 1 +
> include/uapi/linux/videodev2.h | 2 ++
Might be better to split this patch.
> 2 files changed, 3 insertions(+)
>
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index 0b69a77..a193905 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -116,6 +116,7 @@
> #define DRM_FORMAT_NV24 fourcc_code('N', 'V', '2', '4') /*
> non-subsampled Cr:Cb plane */
> #define DRM_FORMAT_NV42 fourcc_code('N', 'V', '4', '2') /*
> non-subsampled Cb:Cr plane */
>
> +#define DRM_FORMAT_MT21 fourcc_code('M', 'T', '2', '1') /*
> Mediatek Block Mode */
Please document the tiling format, don't just add a define here.
> /*
> * 3 plane YCbCr
> * index 0: Y plane, [7:0] Y
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index d0acd26..e9e3276 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -527,6 +527,8 @@ struct v4l2_pix_format {
> #define V4L2_PIX_FMT_HM12 v4l2_fourcc('H', 'M', '1', '2') /* 8 YUV
> 4:2:0 16x16 macroblocks */
> #define V4L2_PIX_FMT_M420 v4l2_fourcc('M', '4', '2', '0') /* 12 YUV
> 4:2:0 2 lines y, 1 line uv interleaved */
>
> +#define V4L2_PIX_FMT_MT21 v4l2_fourcc('M', 'T', '2', '1') /* Mediatek
> Block Mode */
> +
Same. On Linux Media side, there is docbook documentation where you can
explain in detail.
> /* two planes -- one Y, one Cr + Cb interleaved */
> #define V4L2_PIX_FMT_NV12 v4l2_fourcc('N', 'V', '1', '2') /* 12 Y/CbCr
> 4:2:0 */
> #define V4L2_PIX_FMT_NV21 v4l2_fourcc('N', 'V', '2', '1') /* 12 Y/CrCb
> 4:2:0 */
