redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

drm/atomic-helpers: Recover full cursor plane behaviour

Browse source 
Cursor plane updates have historically been fully async and mutliple
updates batched together for the next vsync. And userspace relies upon
that. Since implementing a full queue of async atomic updates is a bit
of work lets just recover the cursor specific behaviour with a hint
flag and some hacks to drop the vblank wait.

v2: Fix kerneldoc, reported by Wu Fengguang.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2015-01-22 16:36:23 +01:00
parent b486e0e6d5
commit f02ad907cd
2 changed files with 13 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/gpu/drm/drm_atomic_helper.c
View file

@ -909,6 +909,11 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
if (!crtc->state->enable)
continue;
/* Legacy cursor ioctls are completely unsynced, and userspace
* relies on that (by doing tons of cursor updates). */
if (old_state->legacy_cursor_update)
continue;
if (!framebuffer_changed(dev, old_state, crtc))
continue;
@ -1335,6 +1340,9 @@ retry:
if (ret != 0)
goto fail;
if (plane == crtc->cursor)
state->legacy_cursor_update = true;
/* Driver takes ownership of state on successful commit. */
return 0;
fail:
@ -1410,6 +1418,9 @@ retry:
plane_state->src_h = 0;
plane_state->src_w = 0;
if (plane == plane->crtc->cursor)
state->legacy_cursor_update = true;
ret = drm_atomic_commit(state);
if (ret != 0)
goto fail;

2
include/drm/drm_crtc.h
View file

@ -909,6 +909,7 @@ struct drm_bridge {
* struct struct drm_atomic_state - the global state object for atomic updates
* @dev: parent DRM device
* @allow_modeset: allow full modeset
* @legacy_cursor_update: hint to enforce legacy cursor ioctl semantics
* @planes: pointer to array of plane pointers
* @plane_states: pointer to array of plane states pointers
* @crtcs: pointer to array of CRTC pointers
@ -921,6 +922,7 @@ struct drm_bridge {
struct drm_atomic_state {
struct drm_device *dev;
bool allow_modeset : 1;
bool legacy_cursor_update : 1;
struct drm_plane **planes;
struct drm_plane_state **plane_states;
struct drm_crtc **crtcs;