drm_dp_mst_topology_get_port_validated
port = drm_dp_mst_topology_get_port_validated(mgr, port);
port = drm_dp_mst_topology_get_port_validated(mgr, port);
struct drm_dp_mst_port *port = drm_dp_mst_topology_get_port_validated(mgr, payload->port);
port = drm_dp_mst_topology_get_port_validated(mgr, payload->port);
port = drm_dp_mst_topology_get_port_validated(mgr, port);
port = drm_dp_mst_topology_get_port_validated(mgr, port);