SS_MODE_V3_EXTERNAL_SS_MASK 6680 drivers/gpu/drm/amd/include/atombios.h #define SS_MODE_V3_EXTERNAL_SS_MASK               0x02
SS_MODE_V3_EXTERNAL_SS_MASK 5539 drivers/gpu/drm/radeon/atombios.h #define SS_MODE_V3_EXTERNAL_SS_MASK               0x02