diff options
| author | Paul Kocialkowski <paul.kocialkowski@bootlin.com> | 2019-01-18 15:51:12 +0100 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2019-01-18 19:00:18 +0100 |
| commit | a211e56e947c8dbf37e1682f278bcfe8b20129c4 (patch) | |
| tree | 8d29c37b6883803356be4097382828e284e07feb | |
| parent | 41c8c210a2b4ba8b1b532cdba7ff0112ef76abb2 (diff) | |
drm/fourcc: Add format info helpers for checking YUV sub-sampling
Display engine drivers often need to distinguish between different types of
YUV sub-sampling. This introduces helpers to check for common sub-sampling
ratios in their commonly-used denomination from the DRM format info.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190118145133.21281-3-paul.kocialkowski@bootlin.com
| -rw-r--r-- | include/drm/drm_fourcc.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 01cd353d9302..b3d9d88ab290 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -185,6 +185,81 @@ drm_format_info_is_yuv_planar(const struct drm_format_info *info) return info->is_yuv && info->num_planes == 3; } +/** + * drm_format_info_is_yuv_sampling_410 - check that the format info matches a + * YUV format with 4:1:0 sub-sampling + * @info: format info + * + * Returns: + * A boolean indicating whether the format info matches a YUV format with 4:1:0 + * sub-sampling. + */ +static inline bool +drm_format_info_is_yuv_sampling_410(const struct drm_format_info *info) +{ + return info->is_yuv && info->hsub == 4 && info->vsub == 4; +} + +/** + * drm_format_info_is_yuv_sampling_411 - check that the format info matches a + * YUV format with 4:1:1 sub-sampling + * @info: format info + * + * Returns: + * A boolean indicating whether the format info matches a YUV format with 4:1:1 + * sub-sampling. + */ +static inline bool +drm_format_info_is_yuv_sampling_411(const struct drm_format_info *info) +{ + return info->is_yuv && info->hsub == 4 && info->vsub == 1; +} + +/** + * drm_format_info_is_yuv_sampling_420 - check that the format info matches a + * YUV format with 4:2:0 sub-sampling + * @info: format info + * + * Returns: + * A boolean indicating whether the format info matches a YUV format with 4:2:0 + * sub-sampling. + */ +static inline bool +drm_format_info_is_yuv_sampling_420(const struct drm_format_info *info) +{ + return info->is_yuv && info->hsub == 2 && info->vsub == 2; +} + +/** + * drm_format_info_is_yuv_sampling_422 - check that the format info matches a + * YUV format with 4:2:2 sub-sampling + * @info: format info + * + * Returns: + * A boolean indicating whether the format info matches a YUV format with 4:2:2 + * sub-sampling. + */ +static inline bool +drm_format_info_is_yuv_sampling_422(const struct drm_format_info *info) +{ + return info->is_yuv && info->hsub == 2 && info->vsub == 1; +} + +/** + * drm_format_info_is_yuv_sampling_444 - check that the format info matches a + * YUV format with 4:4:4 sub-sampling + * @info: format info + * + * Returns: + * A boolean indicating whether the format info matches a YUV format with 4:4:4 + * sub-sampling. + */ +static inline bool +drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info) +{ + return info->is_yuv && info->hsub == 1 && info->vsub == 1; +} + const struct drm_format_info *__drm_format_info(u32 format); const struct drm_format_info *drm_format_info(u32 format); const struct drm_format_info * |