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drm/atomic: Clean up wait_for_vblanks, v2.

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Stop relying on a per crtc_state last_vblank_count, we shouldn't touch
crtc_state after commit. Move it to atomic_state->crtcs.

Also stop re-using new_crtc_state->enable, we can now simply set a
bitmask with crtc_crtc_mask.

Changes since v1:
- Keep last_vblank_count in __drm_crtc_state.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/8e4759a4-24d3-3f80-bd1a-1e7a9c83b612@linux.intel.com
This commit is contained in:
Maarten Lankhorst
2016-12-15 12:51:42 +01:00
committed by Daniel Vetter
parent 0532be078a
commit bdc571464c
3 changed files with 15 additions and 19 deletions
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28
drivers/gpu/drm/drm_atomic_helper.c
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@@ -1117,19 +1117,19 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
struct drm_crtc *crtc;
struct drm_crtc_state *old_crtc_state;
int i, ret;
unsigned crtc_mask = 0;
/*
* Legacy cursor ioctls are completely unsynced, and userspace
* relies on that (by doing tons of cursor updates).
*/
if (old_state->legacy_cursor_update)
return;
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
/* No one cares about the old state, so abuse it for tracking
* and store whether we hold a vblank reference (and should do a
* vblank wait) in the ->enable boolean. */
old_crtc_state->enable = false;
struct drm_crtc_state *new_crtc_state = crtc->state;
if (!crtc->state->active)
continue;
/* Legacy cursor ioctls are completely unsynced, and userspace
* relies on that (by doing tons of cursor updates). */
if (old_state->legacy_cursor_update)
if (!new_crtc_state->active)
continue;
if (!drm_atomic_helper_framebuffer_changed(dev,
@@ -1140,16 +1140,16 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
if (ret != 0)
continue;
old_crtc_state->enable = true;
old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc);
crtc_mask |= drm_crtc_mask(crtc);
old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc);
}
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
if (!old_crtc_state->enable)
if (!(crtc_mask & drm_crtc_mask(crtc)))
continue;
ret = wait_event_timeout(dev->vblank[i].queue,
old_crtc_state->last_vblank_count !=
old_state->crtcs[i].last_vblank_count !=
drm_crtc_vblank_count(crtc),
msecs_to_jiffies(50));