Commit d9c38242 authored by Robert Fekete's avatar Robert Fekete Committed by Daniel Vetter

drm: Describe the Rotation property bits.

Adds clarification of the rotation property bits. I.e. rotation is
counter clockwise and that reflects are applied before any rotation.

v2: Refer to the define names instead of the property values.
Signed-off-by: default avatarRobert Fekete <robert.fekete@linux.intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent cb119717
...@@ -85,7 +85,11 @@ static inline uint64_t I642U64(int64_t val) ...@@ -85,7 +85,11 @@ static inline uint64_t I642U64(int64_t val)
return (uint64_t)*((uint64_t *)&val); return (uint64_t)*((uint64_t *)&val);
} }
/* rotation property bits */ /*
* Rotation property bits. DRM_ROTATE_<degrees> rotates the image by the
* specified amount in degrees in counter clockwise direction. DRM_REFLECT_X and
* DRM_REFLECT_Y reflects the image along the specified axis prior to rotation
*/
#define DRM_ROTATE_MASK 0x0f #define DRM_ROTATE_MASK 0x0f
#define DRM_ROTATE_0 0 #define DRM_ROTATE_0 0
#define DRM_ROTATE_90 1 #define DRM_ROTATE_90 1
......
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