_PIPE            1283 drivers/gpu/drm/gma500/psb_intel_reg.h #define _PIPE(pipe, a, b) ((a) + (pipe)*((b)-(a)))
_PIPE             228 drivers/gpu/drm/i915/i915_reg.h #define _PIPE(pipe, a, b)		_PICK_EVEN(pipe, a, b)