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drm/atomic: debug output for EBUSY

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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)

Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
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>
Link: https://patchwork.freedesktop.org/patch/msgid/20200925084651.3250104-2-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2020-09-25 10:46:51 +02:00
parent fb6473a48b
commit 9073d4ed8d
1 changed files with 17 additions and 3 deletions
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20
drivers/gpu/drm/drm_atomic_helper.c
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@ -1736,8 +1736,11 @@ 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);
}
@ -1955,6 +1958,9 @@ 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) {
@ -2129,8 +2135,12 @@ 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);
@ -2144,8 +2154,12 @@ 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);