Extern or forward variable declaration at drivers/gpu/drm/mediatek/mtk_drm_drv.h, line 18 References: drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 344 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 634 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 709 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 732 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c, line 512 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c, line 523 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 46 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 146 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 265 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 293 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 333 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 570 drivers/gpu/drm/mediatek/mtk_drm_drv.c, line 581 drivers/gpu/drm/mediatek/mtk_drm_drv.h, line 18 drivers/gpu/drm/mediatek/mtk_drm_drv.h, line 35 drivers/gpu/drm/mediatek/mtk_drm_gem.c, line 16 drivers/gpu/drm/mediatek/mtk_drm_gem.c, line 38 drivers/gpu/drm/mediatek/mtk_drm_gem.c, line 98 drivers/gpu/drm/mediatek/mtk_drm_gem.c, line 211 drivers/gpu/drm/mediatek/mtk_drm_plane.c, line 227