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drm: Add helper to implement legacy dirtyfb

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Add an atomic helper to implement dirtyfb support.  This is needed to
support DSI command-mode panels with x11 userspace (ie. when we can't
rely on pageflips to trigger a flush to the panel).

v2: Modified the helper to use plane fb_damage_clips property and
removed plane_state::dirty flag.

v3:
- Use uapi drm_mode_rect.
- Support annotate flags.

v4: Correct kernel doc.

Signed-off-by: Rob Clark <robdclark@gmail.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>
This commit is contained in:
Rob Clark
2018-05-30 17:46:20 -07:00
committed by Thomas Hellstrom
parent f13ba9c21d
commit b9fc5e01d1
2 changed files with 130 additions and 0 deletions
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4
include/drm/drm_damage_helper.h
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@@ -67,6 +67,10 @@ struct drm_atomic_helper_damage_iter {
void drm_plane_enable_fb_damage_clips(struct drm_plane *plane);
void drm_atomic_helper_check_plane_damage(struct drm_atomic_state *state,
struct drm_plane_state *plane_state);
int drm_atomic_helper_dirtyfb(struct drm_framebuffer *fb,
struct drm_file *file_priv, unsigned int flags,
unsigned int color, struct drm_clip_rect *clips,
unsigned int num_clips);
void
drm_atomic_helper_damage_iter_init(struct drm_atomic_helper_damage_iter *iter,
const struct drm_plane_state *old_state,