Function prototype or declaration at include/drm/drm_atomic_state_helper.h, line 63 References: drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c, line 242 drivers/gpu/drm/arm/hdlcd_crtc.c, line 295 drivers/gpu/drm/ast/ast_mode.c, line 628 drivers/gpu/drm/drm_atomic_state_helper.c, line 325 drivers/gpu/drm/drm_atomic_state_helper.c, line 338 drivers/gpu/drm/drm_simple_kms_helper.c, line 318 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c, line 180 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c, line 839 drivers/gpu/drm/imx/dcss/dcss-plane.c, line 97 drivers/gpu/drm/ingenic/ingenic-drm-drv.c, line 789 drivers/gpu/drm/ingenic/ingenic-ipu.c, line 675 drivers/gpu/drm/kmb/kmb_plane.c, line 572 drivers/gpu/drm/meson/meson_overlay.c, line 804 drivers/gpu/drm/meson/meson_plane.c, line 468 drivers/gpu/drm/mxsfb/mxsfb_kms.c, line 574 drivers/gpu/drm/omapdrm/omap_plane.c, line 242 drivers/gpu/drm/qxl/qxl_display.c, line 899 drivers/gpu/drm/qxl/qxl_display.c, line 921 drivers/gpu/drm/rockchip/rockchip_drm_vop.c, line 1120 drivers/gpu/drm/sti/sti_cursor.c, line 355 drivers/gpu/drm/sti/sti_gdp.c, line 909 drivers/gpu/drm/sti/sti_hqvdp.c, line 1287 drivers/gpu/drm/stm/ltdc.c, line 943 drivers/gpu/drm/sun4i/sun8i_ui_layer.c, line 342 drivers/gpu/drm/sun4i/sun8i_vi_layer.c, line 446 drivers/gpu/drm/tidss/tidss_plane.c, line 171 drivers/gpu/drm/tilcdc/tilcdc_plane.c, line 19 drivers/gpu/drm/vboxvideo/vbox_mode.c, line 499 drivers/gpu/drm/virtio/virtgpu_plane.c, line 81 drivers/gpu/drm/xlnx/zynqmp_disp.c, line 1218 drivers/gpu/drm/zte/zx_plane.c, line 455