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authorMaxime Ripard <maxime.ripard@bootlin.com>2018-04-11 10:39:25 +0300
committerMaxime Ripard <maxime.ripard@bootlin.com>2018-04-16 22:17:29 +0300
commitae0e28265e216dad11d4cbde42fc15e92919af78 (patch)
tree08e84813756efaadf64b1be7ae953f62fb4a8a4f /include/drm/drm_blend.h
parenta08fc7c8056e75b08285a2ad955228002dcd86bc (diff)
downloadlinux-ae0e28265e216dad11d4cbde42fc15e92919af78.tar.xz
drm/blend: Add a generic alpha property
Some drivers duplicate the logic to create a property to store a per-plane alpha. This is especially useful if we ever want to support extra protocols for Wayland like: https://lists.freedesktop.org/archives/wayland-devel/2017-August/034741.html Let's create a helper in order to move that to the core. Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Acked-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/6e1ce0db78fcfc407e94913c64819e65109d034d.1523432341.git-series.maxime.ripard@bootlin.com
Diffstat (limited to 'include/drm/drm_blend.h')
-rw-r--r--include/drm/drm_blend.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h
index 17606026590b..330c561c4c11 100644
--- a/include/drm/drm_blend.h
+++ b/include/drm/drm_blend.h
@@ -36,6 +36,9 @@ static inline bool drm_rotation_90_or_270(unsigned int rotation)
return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
}
+#define DRM_BLEND_ALPHA_OPAQUE 0xffff
+
+int drm_plane_create_alpha_property(struct drm_plane *plane);
int drm_plane_create_rotation_property(struct drm_plane *plane,
unsigned int rotation,
unsigned int supported_rotations);