Function prototype or declaration at include/drm/drm_crtc_helper.h, line 182 References: drivers/gpu/drm/armada/armada_crtc.c, line 1012 drivers/gpu/drm/ast/ast_mode.c, line 659 drivers/gpu/drm/bochs/bochs_kms.c, line 131 drivers/gpu/drm/cirrus/cirrus_mode.c, line 369 drivers/gpu/drm/drm_crtc_helper.c, line 467 drivers/gpu/drm/drm_crtc_helper.c, line 717 drivers/gpu/drm/exynos/exynos_drm_crtc.c, line 235 drivers/gpu/drm/gma500/gma_display.c, line 543 drivers/gpu/drm/gma500/gma_display.c, line 546 drivers/gpu/drm/imx/ipuv3-crtc.c, line 132 drivers/gpu/drm/mgag200/mgag200_mode.c, line 1299 drivers/gpu/drm/nouveau/dispnv04/crtc.c, line 1055 drivers/gpu/drm/omapdrm/omap_crtc.c, line 660 drivers/gpu/drm/radeon/radeon_display.c, line 611 drivers/gpu/drm/rockchip/rockchip_drm_vop.c, line 1031 drivers/gpu/drm/shmobile/shmob_drm_crtc.c, line 509 drivers/gpu/drm/tilcdc/tilcdc_crtc.c, line 414 drivers/gpu/drm/udl/udl_modeset.c, line 413 include/drm/drm_crtc_helper.h, line 182