diff --git a/drivers/video/rockchip/rk_vop.c b/drivers/video/rockchip/rk_vop.c
index eab5486..aeecb58 100644
--- a/drivers/video/rockchip/rk_vop.c
+++ b/drivers/video/rockchip/rk_vop.c
@@ -321,7 +321,7 @@
 	 * clock so it is currently not possible to use more than one display
 	 * device simultaneously.
 	 */
-	port = fdt_subnode_offset(blob, dev->of_offset, "port");
+	port = fdt_subnode_offset(blob, dev_of_offset(dev), "port");
 	if (port < 0)
 		return -EINVAL;
 	for (node = fdt_first_subnode(blob, port);