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-rw-r--r--drivers/gpu/drm/drm_atomic_helper.c2
-rw-r--r--include/drm/drm_modeset_helper_vtables.h2
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 47e84aa7b6e2..bab8051690bb 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1184,6 +1184,8 @@ static void drm_atomic_helper_commit_writebacks(struct drm_device *dev,
const struct drm_connector_helper_funcs *funcs;
funcs = connector->helper_private;
+ if (!funcs->atomic_commit)
+ continue;
if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) {
WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
index fb841f44949c..d0eb76c4b309 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -983,6 +983,8 @@ struct drm_connector_helper_funcs {
* The writeback_job to commit is available in
* &drm_connector_state.writeback_job.
*
+ * This hook is optional.
+ *
* This callback is used by the atomic modeset helpers.
*/
void (*atomic_commit)(struct drm_connector *connector,
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