@@ -1740,8 +1740,11 @@ int drm_atomic_helper_async_check(struct drm_device *dev,
* overridden by a previous synchronous update's state.
*/
if (old_plane_state->commit &&
- !try_wait_for_completion(&old_plane_state->commit->hw_done))
+ !try_wait_for_completion(&old_plane_state->commit->hw_done)) {
+ DRM_DEBUG_ATOMIC("[PLANE:%d:%s] inflight previous commit preventing async commit\n",
+ plane->base.id, plane->name);
return -EBUSY;
+ }
return funcs->atomic_async_check(plane, new_plane_state);
}
@@ -1964,6 +1967,9 @@ static int stall_checks(struct drm_crtc *crtc, bool nonblock)
* commit with nonblocking ones. */
if (!completed && nonblock) {
spin_unlock(&crtc->commit_lock);
+ DRM_DEBUG_ATOMIC("[CRTC:%d:%s] busy with a previous commit\n",
+ crtc->base.id, crtc->name);
+
return -EBUSY;
}
} else if (i == 1) {
@@ -2132,8 +2138,12 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
/* Userspace is not allowed to get ahead of the previous
* commit with nonblocking ones. */
if (nonblock && old_conn_state->commit &&
- !try_wait_for_completion(&old_conn_state->commit->flip_done))
+ !try_wait_for_completion(&old_conn_state->commit->flip_done)) {
+ DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] busy with a previous commit\n",
+ conn->base.id, conn->name);
+
return -EBUSY;
+ }
/* Always track connectors explicitly for e.g. link retraining. */
commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc);
@@ -2147,8 +2157,12 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
/* Userspace is not allowed to get ahead of the previous
* commit with nonblocking ones. */
if (nonblock && old_plane_state->commit &&
- !try_wait_for_completion(&old_plane_state->commit->flip_done))
+ !try_wait_for_completion(&old_plane_state->commit->flip_done)) {
+ DRM_DEBUG_ATOMIC("[PLANE:%d:%s] busy with a previous commit\n",
+ plane->base.id, plane->name);
+
return -EBUSY;
+ }
/* Always track planes explicitly for async pageflip support. */
commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc);
Hopefully we'll have the drm crash recorder RSN, but meanwhile compositors would like to know a bit better why they get an EBUSY. v2: Move misplaced hunk to the right patch (Pekka) Cc: Sean Paul <seanpaul@chromium.org> Cc: Daniel Stone <daniel@fooishbar.org> Cc: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Cc: Simon Ser <contact@emersion.fr> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> --- drivers/gpu/drm/drm_atomic_helper.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-)