DRM_I915_VBLANK_PIPE_A 669 include/uapi/drm/i915_drm.h #define DRM_I915_VBLANK_PIPE_A 1 DRM_I915_VBLANK_PIPE_A 669 tools/include/uapi/drm/i915_drm.h #define DRM_I915_VBLANK_PIPE_A 1