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authorLukasz Spintzyk <lukasz.spintzyk@displaylink.com>2018-05-23 19:04:08 -0700
committerThomas Hellstrom <thellstrom@vmware.com>2018-12-05 10:00:35 +0100
commitd3b21767821ed322a4024c99bc360cd0892f3d82 (patch)
treedb6b2fe7632cba3056e03a8d394f3300b74cfd6a /Documentation/gpu
parent818182dd1097fdc492aaef9b08755ea13274352d (diff)
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drm: Add a new plane property to send damage during plane update
FB_DAMAGE_CLIPS is an optional plane property to mark damaged regions on the plane in framebuffer coordinates of the framebuffer attached to the plane. The layout of blob data is simply an array of "struct drm_mode_rect". Unlike plane src coordinates, damage clips are not in 16.16 fixed point. As plane src in framebuffer cannot be negative so are damage clips. In damage clip, x1/y1 are inclusive and x2/y2 are exclusive. This patch also exports the kernel internal drm_rect to userspace as drm_mode_rect. This is because "struct drm_clip_rect" is not sufficient to represent damage for current plane size. Driver which are interested in enabling FB_DAMAGE_CLIPS property for a plane should enable this property using drm_plane_enable_damage_clips. v2: - Input validation on damage clips against framebuffer size. - Doc update, other minor changes. Signed-off-by: Lukasz Spintzyk <lukasz.spintzyk@displaylink.com> Signed-off-by: Deepak Rawat <drawat@vmware.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-kms.rst12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index 4b1501b4835b..6c3e89e324f8 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -554,6 +554,18 @@ Plane Composition Properties
.. kernel-doc:: drivers/gpu/drm/drm_blend.c
:export:
+FB_DAMAGE_CLIPS
+~~~~~~~~~~~~~~~
+
+.. kernel-doc:: drivers/gpu/drm/drm_damage_helper.c
+ :doc: overview
+
+.. kernel-doc:: drivers/gpu/drm/drm_damage_helper.c
+ :export:
+
+.. kernel-doc:: include/drm/drm_damage_helper.h
+ :internal:
+
Color Management Properties
---------------------------