drm/amd/dp_mst: Expose a connector to kernel users after it's properly initialized

After a connector is added to the drm_mode_config::connector_list, it's
visible to any in-kernel users looking up connectors via the above list.
Make sure that the connector is properly initialized before such
look-ups, by initializing the connector with
drm_connector_dynamic_init() - which doesn't add the connector to the
list - and registering it with drm_connector_dynamic_register() - which
adds the connector to the list - after the initialization is complete.

v2: Fix s/drm_connector_dynamic_register()/drm_connector_dynamic_init()
    typo in the commit log.

Cc: Harry Wentland <[email protected]>
Cc: Leo Li <[email protected]>
Cc: Wayne Lin <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Lyude Paul <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Acked-by: Wayne Lin <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: ideak

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

@@ -590,11 +590,12 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	amdgpu_dm_set_mst_status(&aconnector->mst_status,
 			MST_PROBE, true);
 
-	if (drm_connector_init(
+	if (drm_connector_dynamic_init(
 		dev,
 		connector,
 		&dm_dp_mst_connector_funcs,
-		DRM_MODE_CONNECTOR_DisplayPort)) {
+		DRM_MODE_CONNECTOR_DisplayPort,
+		NULL)) {
 		kfree(aconnector);
 		return NULL;
 	}