DP_MAX_LANE_COUNT
dpcd_reg_read(id, DP_MAX_LANE_COUNT) & DP_MAX_LANE_COUNT_MASK);
DP_MAX_LANE_COUNT) & DP_MAX_LANE_COUNT_MASK;
uint8 sandbox = dpcd_reg_read(connectorIndex, DP_MAX_LANE_COUNT);
&& (dpcd_reg_read(connectorIndex, DP_MAX_LANE_COUNT)