DP_CAP_DP_SIGNALLING
signal = DP_CAP_DP_SIGNALLING(dp->port->vdo) & DP_CAP_DP_SIGNALLING(dp->alt->vdo);
signal &= DP_CAP_DP_SIGNALLING(dp->plug_prime->vdo);
desc->vdo |= DP_CAP_DP_SIGNALLING(0) | DP_CAP_RECEPTACLE;
DP_CAP_DP_SIGNALLING(0) | DP_CAP_USB |