ucDPCD_MAX_LANE_COUNT 4030 drivers/gpu/drm/amd/include/atombios.h   UCHAR               ucDPCD_MAX_LANE_COUNT;            // dpcd 02h
ucDPCD_MAX_LANE_COUNT 3539 drivers/gpu/drm/radeon/atombios.h   UCHAR               ucDPCD_MAX_LANE_COUNT;            // dpcd 02h