From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Add a few helpers to get the dimensions of the chroma plane(s).
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
include/drm/drm_crtc.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 33ddedd..317baf9 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1497,6 +1497,18 @@ 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);
+static inline int drm_format_plane_width(int width, uint32_t format, int plane)
+{
+ if (plane == 0)
+ return width;
+ return width / drm_format_horz_chroma_subsampling(format);
+}
+static inline int drm_format_plane_height(int height, uint32_t format, int plane)
+{
+ if (plane == 0)
+ return height;
+ return height / drm_format_vert_chroma_subsampling(format);
+}
extern const char *drm_get_format_name(uint32_t format);
extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
unsigned int supported_rotations);
--
2.4.9
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