Index: sys/arch/arm/nvidia/tegra_drm_fb.c
===================================================================
RCS file: /cvsroot/src/sys/arch/arm/nvidia/tegra_drm_fb.c,v
retrieving revision 1.6
diff -u -p -r1.6 tegra_drm_fb.c
--- sys/arch/arm/nvidia/tegra_drm_fb.c	26 Dec 2017 14:54:52 -0000	1.6
+++ sys/arch/arm/nvidia/tegra_drm_fb.c	24 Sep 2018 08:26:42 -0000
@@ -53,7 +53,8 @@ tegra_drm_fb_init(struct drm_device *dde
 	int error;
 
 	fbdev = kmem_zalloc(sizeof(*fbdev), KM_SLEEP);
-	fbdev->helper.funcs = &tegra_fb_helper_funcs;
+
+	drm_fb_helper_prepare(ddev, &fbdev->helper, &tegra_fb_helper_funcs);
 
 	error = drm_fb_helper_init(ddev, &fbdev->helper, 2, 1);
 	if (error) {