I915_PARAM_SUBSLICE_MASK 552 include/uapi/drm/i915_drm.h #define I915_PARAM_SUBSLICE_MASK 47 I915_PARAM_SUBSLICE_MASK 552 tools/include/uapi/drm/i915_drm.h #define I915_PARAM_SUBSLICE_MASK 47