Extern or forward variable declaration at drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h, line 18 References: drivers/gpu/drm/mediatek/mtk_disp_aal.c, line 64 drivers/gpu/drm/mediatek/mtk_disp_gamma.c, line 56 drivers/gpu/drm/mediatek/mtk_disp_gamma.c, line 78 drivers/gpu/drm/mediatek/mtk_dpi.c, line 554 drivers/gpu/drm/mediatek/mtk_dpi.c, line 583 drivers/gpu/drm/mediatek/mtk_dpi.c, line 605 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 72 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 85 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 183 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 200 drivers/gpu/drm/mediatek/mtk_drm_crtc.c, line 726 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h, line 18 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h, line 64 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h, line 68 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h, line 163 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h, line 182 drivers/gpu/drm/mediatek/mtk_drm_plane.c, line 85 drivers/gpu/drm/mediatek/mtk_drm_plane.c, line 181