usVDDCBaseLevel  4994 drivers/gpu/drm/amd/include/atombios.h    USHORT   usVDDCBaseLevel;                //In number of 50mv unit
usVDDCBaseLevel  4455 drivers/gpu/drm/radeon/atombios.h    USHORT   usVDDCBaseLevel;                //In number of 50mv unit