SUPPORTED_LCD_REFRESHRATE_30Hz 3890 drivers/gpu/drm/amd/include/atombios.h #define SUPPORTED_LCD_REFRESHRATE_30Hz          0x0004
SUPPORTED_LCD_REFRESHRATE_30Hz 3411 drivers/gpu/drm/radeon/atombios.h #define SUPPORTED_LCD_REFRESHRATE_30Hz          0x0004