Function prototype or declaration at include/drm/drm_fb_helper.h, line 127 References: drivers/gpu/drm/armada/armada_fb.c, line 164 drivers/gpu/drm/drm_fb_cma_helper.c, line 448 drivers/gpu/drm/drm_fb_helper.c, line 391 drivers/gpu/drm/drm_fb_helper.c, line 1768 drivers/gpu/drm/drm_fb_helper.c, line 1794 drivers/gpu/drm/exynos/exynos_drm_fb.c, line 304 drivers/gpu/drm/gma500/framebuffer.c, line 635 drivers/gpu/drm/i915/intel_fbdev.c, line 768 drivers/gpu/drm/msm/msm_drv.c, line 26 drivers/gpu/drm/nouveau/nouveau_fbcon.c, line 445 drivers/gpu/drm/radeon/radeon_fb.c, line 336 drivers/gpu/drm/rockchip/rockchip_drm_fb.c, line 165 drivers/gpu/drm/tegra/fb.c, line 385 include/drm/drm_fb_helper.h, line 127