drm/vc4: Mimic drm_atomic_helper_commit() behavior
The VC4 KMS driver is implementing its own ->atomic_commit() but there
are a few generic helpers we can use instead of open-coding the logic.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/1496392332-8722-4-git-send-email-boris.brezillon@free-electrons.com
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 202f7eb..bc6ecdc 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -42,6 +42,10 @@ vc4_atomic_complete_commit(struct vc4_commit *c)
struct drm_device *dev = state->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
+ drm_atomic_helper_wait_for_fences(dev, state, false);
+
+ drm_atomic_helper_wait_for_dependencies(state);
+
drm_atomic_helper_commit_modeset_disables(dev, state);
drm_atomic_helper_commit_planes(dev, state, 0);
@@ -57,10 +61,14 @@ vc4_atomic_complete_commit(struct vc4_commit *c)
*/
state->legacy_cursor_update = false;
+ drm_atomic_helper_commit_hw_done(state);
+
drm_atomic_helper_wait_for_vblanks(dev, state);
drm_atomic_helper_cleanup_planes(dev, state);
+ drm_atomic_helper_commit_cleanup_done(state);
+
drm_atomic_state_put(state);
up(&vc4->async_modeset);
@@ -117,32 +125,10 @@ static int vc4_atomic_commit(struct drm_device *dev,
if (!c)
return -ENOMEM;
- /* Make sure that any outstanding modesets have finished. */
- if (nonblock) {
- struct drm_crtc *crtc;
- struct drm_crtc_state *crtc_state;
- unsigned long flags;
- bool busy = false;
+ ret = drm_atomic_helper_setup_commit(state, nonblock);
+ if (ret)
+ return ret;
- /*
- * If there's an undispatched event to send then we're
- * obviously still busy. If there isn't, then we can
- * unconditionally wait for the semaphore because it
- * shouldn't be contended (for long).
- *
- * This is to prevent a race where queuing a new flip
- * from userspace immediately on receipt of an event
- * beats our clean-up and returns EBUSY.
- */
- spin_lock_irqsave(&dev->event_lock, flags);
- for_each_crtc_in_state(state, crtc, crtc_state, i)
- busy |= vc4_event_pending(crtc);
- spin_unlock_irqrestore(&dev->event_lock, flags);
- if (busy) {
- kfree(c);
- return -EBUSY;
- }
- }
ret = down_interruptible(&vc4->async_modeset);
if (ret) {
kfree(c);