intel_wait_for_vblank_if_active
intel_wait_for_vblank_if_active(display, !crtc->pipe);
intel_wait_for_vblank_if_active(display, PIPE_A);
intel_wait_for_vblank_if_active(display, PIPE_A);
void intel_wait_for_vblank_if_active(struct intel_display *display,
intel_wait_for_vblank_if_active(display, PIPE_A);