GEN8_F2_SS_DIS_SHIFT 2918 drivers/gpu/drm/i915/i915_reg.h #define   GEN8_F2_SS_DIS_MASK		(0x7 << GEN8_F2_SS_DIS_SHIFT)
GEN8_F2_SS_DIS_SHIFT  486 drivers/gpu/drm/i915/intel_device_info.c 			   GEN8_F2_SS_DIS_SHIFT);