ucFRC            2440 drivers/gpu/drm/amd/include/atombios.h   UCHAR  ucFRC;         // bit4=0: 25FRC_SEL pattern E
ucFRC            2056 drivers/gpu/drm/radeon/atombios.h   UCHAR  ucFRC;         // bit4=0: 25FRC_SEL pattern E
ucFRC             641 drivers/gpu/drm/radeon/atombios_encoders.c 			args.v2.ucFRC = 0;