usFirmwareVersion 3309 drivers/gpu/drm/amd/include/atombios.h   USHORT                     usFirmwareVersion;         //0 means FW is not supported. Otherwise it's the FW version loaded by SBIOS and driver should enable FW.
usFirmwareVersion 2856 drivers/gpu/drm/radeon/atombios.h   USHORT                     usFirmwareVersion;         //0 means FW is not supported. Otherwise it's the FW version loaded by SBIOS and driver should enable FW.