Extern or forward variable declaration at drivers/gpu/drm/mediatek/mtk_drm_drv.h, line 17 References: drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 34 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 59 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 71 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 90 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 99 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 118 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 134 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 141 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 149 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 160 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 170 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 210 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 322 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 358 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 383 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 415 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 432 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 508 drivers/gpu/drm/mediatek/mtk_drm_drv.h, line 17 drivers/gpu/drm/mediatek/mtk_drm_plane.c, line 107