PLANE_FLIP_DONE_INT_STATUS_VLV
i915_enable_pipestat(display, pipe, PLANE_FLIP_DONE_INT_STATUS_VLV);
i915_disable_pipestat(display, pipe, PLANE_FLIP_DONE_INT_STATUS_VLV);
if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)