ucExtendedFunctionCode 237 drivers/gpu/drm/amd/include/atombios.h UCHAR ucExtendedFunctionCode; ucExtendedFunctionCode 260 drivers/gpu/drm/amd/include/atombios.h UCHAR ucExtendedFunctionCode; ucExtendedFunctionCode 229 drivers/gpu/drm/radeon/atombios.h UCHAR ucExtendedFunctionCode;