usBacklightPWM   4016 drivers/gpu/drm/amd/include/atombios.h   USHORT              usBacklightPWM;            //  Backlight PWM in Hz. New in _V13
usBacklightPWM   3525 drivers/gpu/drm/radeon/atombios.h   USHORT              usBacklightPWM;            //  Backlight PWM in Hz. New in _V13