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drm: Add support for optional per-plane rotation property

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Not all planes on the system may support the same rotations/reflections,
so make it possible to create a separate property for each plane.
This way userspace gets told exactly which rotations/reflections are
possible for each plane.

v2: Add drm_plane_create_rotation_property() helper
v3: Drop the BIT(), __builtin_ffs(x) - 1,
    Moar WARNs for bad parameters
    Deal with superfluous code shuffling

Signed-off-by: Ville Syrjälä <[email protected]>
Reviewed-by: Chris Wilson <[email protected]> (v1)
Reviewed-by: Joonas Lahtinen <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Ville Syrjälä 2016-09-26 19:30:48 +03:00 • committed by Daniel Vetter
commit d138dd3c0c
5 changed files with 49 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/drm/drm_blend.h
View file

@ -54,6 +54,9 @@ static inline bool drm_rotation_90_or_270(unsigned int rotation)
struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
unsigned int supported_rotations);
int drm_plane_create_rotation_property(struct drm_plane *plane,
unsigned int rotation,
unsigned int supported_rotations);
unsigned int drm_rotation_simplify(unsigned int rotation,
unsigned int supported_rotations);

2
include/drm/drm_plane.h
View file

@ -385,6 +385,7 @@ enum drm_plane_type {
* @type: type of plane (overlay, primary, cursor)
* @state: current atomic state for this plane
* @zpos_property: zpos property for this plane
* @rotation_property: rotation property for this plane
* @helper_private: mid-layer private data
*/
struct drm_plane {
@ -431,6 +432,7 @@ struct drm_plane {
struct drm_plane_state *state;
struct drm_property *zpos_property;
struct drm_property *rotation_property;
};
#define obj_to_plane(x) container_of(x, struct drm_plane, base)