forked from luck/tmp_suning_uos_patched
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
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@ -185,6 +185,81 @@ drm_format_info_is_yuv_planar(const struct drm_format_info *info)
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return info->is_yuv && info->num_planes == 3;
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}
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/**
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* drm_format_info_is_yuv_sampling_410 - check that the format info matches a
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* YUV format with 4:1:0 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:1:0
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_410(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 4 && info->vsub == 4;
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}
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/**
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* drm_format_info_is_yuv_sampling_411 - check that the format info matches a
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* YUV format with 4:1:1 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:1:1
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_411(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 4 && info->vsub == 1;
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}
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/**
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* drm_format_info_is_yuv_sampling_420 - check that the format info matches a
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* YUV format with 4:2:0 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:2:0
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_420(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 2 && info->vsub == 2;
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}
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/**
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* drm_format_info_is_yuv_sampling_422 - check that the format info matches a
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* YUV format with 4:2:2 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:2:2
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_422(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 2 && info->vsub == 1;
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}
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/**
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* drm_format_info_is_yuv_sampling_444 - check that the format info matches a
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* YUV format with 4:4:4 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:4:4
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 1 && info->vsub == 1;
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}
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const struct drm_format_info *__drm_format_info(u32 format);
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const struct drm_format_info *drm_format_info(u32 format);
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const struct drm_format_info *
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