Hi
On Wed, 2016-04-13 at 10:23 -0400, Nicolas Dufresne wrote:
> Le mercredi 13 avril 2016 à 20:01 +0800, Tiffany Lin a écrit :
> > From: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
> >
> > 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 <tiffany.lin@xxxxxxxxxxxx>
> > ---
> > include/uapi/drm/drm_fourcc.h | 1 +
> > include/uapi/linux/videodev2.h | 2 ++
>
> Might be better to split this patch.
Got it, will split to two patch in next version.
>
> > 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.
Got it, will add documentation in next version.
>
> > /*
> > * 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.
Got it, will add documentation in next version.
>
> > /* 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 */
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