diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 6ca831d221ec0cff4e6bad6d320e91c8f841f9d9..c356de5dd220679b39818988d26fa58bfa0add6e 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -188,12 +188,6 @@ struct vop {
 	struct vop_win win[];
 };
 
-static inline void vop_writel(struct vop *vop, uint32_t offset, uint32_t v)
-{
-	writel(v, vop->regs + offset);
-	vop->regsbak[offset >> 2] = v;
-}
-
 static inline uint32_t vop_readl(struct vop *vop, uint32_t offset)
 {
 	return readl(vop->regs + offset);