Extern or forward variable declaration at drivers/gpu/drm/sun4i/sun8i_vi_layer.h, line 33 References: drivers/gpu/drm/sun4i/sun8i_mixer.c, line 275 drivers/gpu/drm/sun4i/sun8i_mixer.c, line 331 drivers/gpu/drm/sun4i/sun8i_mixer.c, line 455 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 23 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 50 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 142 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 179 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 267 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 276 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 350 drivers/gpu/drm/sun4i/sun8i_vi_layer.h, line 33 drivers/gpu/drm/sun4i/sun8i_vi_layer.h, line 37 drivers/gpu/drm/sun4i/sun8i_vi_layer.h, line 49