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drm: Add drm_format_{horz, vert}_chroma_subsampling() utility functions

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These functions return the chroma subsampling factors for the specified
pixel format.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ville Syrjälä
2012-04-05 21:35:17 +03:00
committed by Dave Airlie
parent 5a86bd5524
commit 01b68b0483
2 changed files with 62 additions and 0 deletions
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include/drm/drm_crtc.h
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@@ -1028,5 +1028,7 @@ extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
int *bpp);
extern int drm_format_num_planes(uint32_t format);
extern int drm_format_plane_cpp(uint32_t format, int plane);
extern int drm_format_horz_chroma_subsampling(uint32_t format);
extern int drm_format_vert_chroma_subsampling(uint32_t format);
#endif /* __DRM_CRTC_H__ */