PV_CONTROL_EN     308 drivers/gpu/drm/vc4/vc4_crtc.c 	CRTC_WRITE(PV_CONTROL, PV_CONTROL_FIFO_CLR | PV_CONTROL_EN);
PV_CONTROL_EN     379 drivers/gpu/drm/vc4/vc4_crtc.c 		   PV_CONTROL_EN);