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SubjectRe: [PATCH 1/2] drm/fourcc: add a 10bits fully packed variant of NV12
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Op 20-05-18 om 19:17 schreef Randy Li:
> This pixel format is a fully packed and 10bits variant of NV12.
> A luma pixel would take 10bits in memory, without any
> filled bits between pixels in a stride. The color gamut
> follows the BT.2020 standard.
>
> Signed-off-by: Randy Li <ayaka@soulik.info>
> ---
> drivers/gpu/drm/drm_fourcc.c | 1 +
> include/uapi/drm/drm_fourcc.h | 3 +++
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
> index 5ca6395cd4d3..1f43967c4013 100644
> --- a/drivers/gpu/drm/drm_fourcc.c
> +++ b/drivers/gpu/drm/drm_fourcc.c
> @@ -173,6 +173,7 @@ const struct drm_format_info *__drm_format_info(u32 format)
> { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1 },
> { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1 },
> { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true },
> + { .format = DRM_FORMAT_NV12_10LE40, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2 },
Hm, the cpp value might give problems because it rounds down, not sure how we should handle that? Set to zero?
> };
>
> unsigned int i;
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index e04613d30a13..8eabf01e966f 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -140,6 +140,9 @@ extern "C" {
> #define DRM_FORMAT_NV61 fourcc_code('N', 'V', '6', '1') /* 2x1 subsampled Cb:Cr plane */
> #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 */
> +/* A fully packed variant of NV12_10LE32 */
> +#define DRM_FORMAT_NV12_10LE40 fourcc_code('R', 'K', '2', '0') /* 2x2 subsampled Cr:Cb plane */
> +
>
> /*
> * 3 plane YCbCr


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