diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 39243480c8345007ee05003e3aaef8a70ea5e323..7719b9cd5b7499ccb92f81f3f3a3838ce536ca22 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -74,55 +74,6 @@ void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 	arm_iommu_detach_device(dev);
 }
 
-int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
-				 const struct rockchip_crtc_funcs *crtc_funcs)
-{
-	int pipe = drm_crtc_index(crtc);
-	struct rockchip_drm_private *priv = crtc->dev->dev_private;
-
-	if (pipe >= ROCKCHIP_MAX_CRTC)
-		return -EINVAL;
-
-	priv->crtc_funcs[pipe] = crtc_funcs;
-
-	return 0;
-}
-
-void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
-{
-	int pipe = drm_crtc_index(crtc);
-	struct rockchip_drm_private *priv = crtc->dev->dev_private;
-
-	if (pipe >= ROCKCHIP_MAX_CRTC)
-		return;
-
-	priv->crtc_funcs[pipe] = NULL;
-}
-
-static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
-					   unsigned int pipe)
-{
-	struct rockchip_drm_private *priv = dev->dev_private;
-	struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
-
-	if (crtc && priv->crtc_funcs[pipe] &&
-	    priv->crtc_funcs[pipe]->enable_vblank)
-		return priv->crtc_funcs[pipe]->enable_vblank(crtc);
-
-	return 0;
-}
-
-static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
-					     unsigned int pipe)
-{
-	struct rockchip_drm_private *priv = dev->dev_private;
-	struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
-
-	if (crtc && priv->crtc_funcs[pipe] &&
-	    priv->crtc_funcs[pipe]->enable_vblank)
-		priv->crtc_funcs[pipe]->disable_vblank(crtc);
-}
-
 static int rockchip_drm_bind(struct device *dev)
 {
 	struct drm_device *drm_dev;
@@ -270,8 +221,6 @@ static struct drm_driver rockchip_drm_driver = {
 	.driver_features	= DRIVER_MODESET | DRIVER_GEM |
 				  DRIVER_PRIME | DRIVER_ATOMIC,
 	.lastclose		= rockchip_drm_lastclose,
-	.enable_vblank		= rockchip_drm_crtc_enable_vblank,
-	.disable_vblank		= rockchip_drm_crtc_disable_vblank,
 	.gem_vm_ops		= &drm_gem_cma_vm_ops,
 	.gem_free_object_unlocked = rockchip_gem_free_object,
 	.dumb_create		= rockchip_gem_dumb_create,
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index fb6226cf84b7ab27dd053125cfbc6a37845cbe7d..9f9bc959b108264d7b4610589828504226757232 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -31,16 +31,6 @@
 struct drm_device;
 struct drm_connector;
 
-/*
- * Rockchip drm private crtc funcs.
- * @enable_vblank: enable crtc vblank irq.
- * @disable_vblank: disable crtc vblank irq.
- */
-struct rockchip_crtc_funcs {
-	int (*enable_vblank)(struct drm_crtc *crtc);
-	void (*disable_vblank)(struct drm_crtc *crtc);
-};
-
 struct rockchip_crtc_state {
 	struct drm_crtc_state base;
 	int output_type;
@@ -58,16 +48,12 @@ struct rockchip_crtc_state {
 struct rockchip_drm_private {
 	struct drm_fb_helper fbdev_helper;
 	struct drm_gem_object *fbdev_bo;
-	const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC];
 	struct drm_atomic_state *state;
 
 	struct list_head psr_list;
 	spinlock_t psr_list_lock;
 };
 
-int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
-				 const struct rockchip_crtc_funcs *crtc_funcs);
-void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc);
 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 				   struct device *dev);
 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index fb5f001f51c3ef039a57cb23183ac878861b357e..ffee8d8c379489ced9437e32c2f4377893473cf5 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -853,11 +853,6 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc)
 	spin_unlock_irqrestore(&vop->irq_lock, flags);
 }
 
-static const struct rockchip_crtc_funcs private_crtc_funcs = {
-	.enable_vblank = vop_crtc_enable_vblank,
-	.disable_vblank = vop_crtc_disable_vblank,
-};
-
 static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
 				const struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode)
@@ -1112,6 +1107,8 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
 	.reset = vop_crtc_reset,
 	.atomic_duplicate_state = vop_crtc_duplicate_state,
 	.atomic_destroy_state = vop_crtc_destroy_state,
+	.enable_vblank = vop_crtc_enable_vblank,
+	.disable_vblank = vop_crtc_disable_vblank,
 };
 
 static void vop_fb_unref_worker(struct drm_flip_work *work, void *val)
@@ -1283,7 +1280,6 @@ static int vop_create_crtc(struct vop *vop)
 	init_completion(&vop->dsp_hold_completion);
 	init_completion(&vop->line_flag_completion);
 	crtc->port = port;
-	rockchip_register_crtc_funcs(crtc, &private_crtc_funcs);
 
 	return 0;
 
@@ -1302,7 +1298,6 @@ static void vop_destroy_crtc(struct vop *vop)
 	struct drm_device *drm_dev = vop->drm_dev;
 	struct drm_plane *plane, *tmp;
 
-	rockchip_unregister_crtc_funcs(crtc);
 	of_node_put(crtc->port);
 
 	/*