diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index c82c7d5f3c6d719532a9e61259a18b620f1b8047..f2f7f69d6cc332867729b9dc46cc5dff39df3067 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1148,8 +1148,8 @@ analogix_dp_best_encoder(struct drm_connector *connector)
 }
 
 
-int analogix_dp_atomic_check(struct drm_connector *connector,
-			     struct drm_atomic_state *state)
+static int analogix_dp_atomic_check(struct drm_connector *connector,
+				    struct drm_atomic_state *state)
 {
 	struct analogix_dp_device *dp = to_dp(connector);
 	struct drm_connector_state *conn_state;