On Fri, 25 Apr 2025 14:01:23 +0300 Tomi Valkeinen <tomi.valkei...@ideasonboard.com> wrote:
> Add greyscale Y8 format.
>
> Acked-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
> Signed-off-by: Tomi Valkeinen <tomi.valkei...@ideasonboard.com>
> ---
> drivers/gpu/drm/drm_fourcc.c | 1 +
> include/uapi/drm/drm_fourcc.h | 10 ++++++++++
> 2 files changed, 11 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
> index e101d1b99aeb..355aaf7b5e9e 100644
> --- a/drivers/gpu/drm/drm_fourcc.c
> +++ b/drivers/gpu/drm/drm_fourcc.c
> @@ -267,6 +267,7 @@ const struct drm_format_info *__drm_format_info(u32
> format)
> { .format = DRM_FORMAT_YVU422, .depth = 0,
> .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true },
> { .format = DRM_FORMAT_YUV444, .depth = 0,
> .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true },
> { .format = DRM_FORMAT_YVU444, .depth = 0,
> .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true },
> + { .format = DRM_FORMAT_Y8, .depth = 8,
> .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true },
> { .format = DRM_FORMAT_NV12, .depth = 0,
> .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true },
> { .format = DRM_FORMAT_NV21, .depth = 0,
> .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true },
> { .format = DRM_FORMAT_NV16, .depth = 0,
> .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index 1247b814bd66..5af64a683dd7 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -405,6 +405,16 @@ extern "C" {
> #define DRM_FORMAT_YUV444 fourcc_code('Y', 'U', '2', '4') /*
> non-subsampled Cb (1) and Cr (2) planes */
> #define DRM_FORMAT_YVU444 fourcc_code('Y', 'V', '2', '4') /*
> non-subsampled Cr (1) and Cb (2) planes */
>
> +/*
> + * Y-only (greyscale) formats
> + *
> + * The Y-only formats are handled similarly to the YCbCr formats in the
> display
> + * pipeline, with the Cb and Cr implicitly neutral (0.0 in nominal values).
> This
> + * also means that COLOR_RANGE property applies to the Y-only formats.
> + *
> + */
> +
> +#define DRM_FORMAT_Y8 fourcc_code('G', 'R', 'E', 'Y') /*
> 8-bit Y-only */
>
> /*
> * Format Modifiers:
>
Reviewed-by: Pekka Paalanen <pekka.paala...@collabora.com>
Thanks,
pq
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