_SPRB_SURF        772 drivers/gpu/drm/i915/gvt/handlers.c 	calc_index(offset, _SPRA_SURF, _SPRB_SURF, 0, SPRSURF(PIPE_C))
_SPRB_SURF       6494 drivers/gpu/drm/i915/i915_reg.h #define SPRSURF(pipe) _MMIO_PIPE(pipe, _SPRA_SURF, _SPRB_SURF)