VDM_STATE_READY
port->vdm_state = VDM_STATE_READY;
case VDM_STATE_READY:
port->vdm_state = VDM_STATE_READY;
port->vdm_state = VDM_STATE_READY;
if (port->vdm_state < VDM_STATE_READY)
if (port->vdm_state > VDM_STATE_READY) {