ucBaseVID 5019 drivers/gpu/drm/amd/include/atombios.h UCHAR ucBaseVID; // if there is no lookup table, VID= BaseVID + ( Vol - BaseLevle ) /VoltageStep ucBaseVID 4480 drivers/gpu/drm/radeon/atombios.h UCHAR ucBaseVID; // if there is no lookup table, VID= BaseVID + ( Vol - BaseLevle ) /VoltageStep