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-rw-r--r--include/drm/drm_connector.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 47e749b74e5f..071143bc0ebd 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -518,6 +518,11 @@ struct drm_connector_state {
* &drm_connector_helper_funcs.atomic_best_encoder or
* &drm_connector_helper_funcs.best_encoder callbacks.
*
+ * This is also used in the atomic helpers to map encoders to their
+ * current and previous connectors, see
+ * &drm_atomic_get_old_connector_for_encoder() and
+ * &drm_atomic_get_new_connector_for_encoder().
+ *
* NOTE: Atomic drivers must fill this out (either themselves or through
* helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will
* not return correct data to userspace.