diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.c b/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.c
index 456d82d884ad..8d71df1d4cbf 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.c
@@ -284,3 +284,70 @@ int rockchip_drm_debugfs_add_color_bar(struct drm_crtc *crtc, struct dentry *roo
 
 	return 0;
 }
+
+static int rockchip_drm_debugfs_regs_write_show(struct seq_file *s, void *data)
+{
+	seq_puts(s, "  Write VOP regs:\n");
+	seq_puts(s, "    echo address val > /sys/kernel/debug/dri/0/video_portx/regs_write\n\n");
+	seq_puts(s, "    video_portx is depend on hardware config, you can get this info from the cmd:\n");
+	seq_puts(s, "    cat /sys/kernel/debug/dri/0/summary\n\n");
+	seq_puts(s, "    Example:\n");
+	seq_puts(s, "    echo 0x27d00000 0x1 > /sys/kernel/debug/dri/0/video_portx/regs_write\n\n");
+
+	return 0;
+}
+
+static int rockchip_drm_debugfs_regs_write_open(struct inode *inode, struct file *file)
+{
+	struct drm_crtc *crtc = inode->i_private;
+
+	return single_open(file, rockchip_drm_debugfs_regs_write_show, crtc);
+}
+
+static ssize_t rockchip_drm_debugfs_regs_write(struct file *file, const char __user *ubuf,
+					       size_t len, loff_t *offp)
+{
+	struct seq_file *s = file->private_data;
+	struct drm_crtc *crtc = s->private;
+	struct rockchip_drm_private *priv = crtc->dev->dev_private;
+	int ret = 0, pipe = drm_crtc_index(crtc);
+	unsigned long address = 0;
+	u32 val = 0;
+	char kbuf[32];
+
+	len = min_t(size_t, len, (sizeof(kbuf) - 1));
+	if (copy_from_user(kbuf, ubuf, len))
+		return -EINVAL;
+
+	kbuf[len] = 0;
+	if (sscanf(kbuf, "%lx %x", &address, &val) == -1)
+		return -EFAULT;
+
+	if (priv->crtc_funcs[pipe]->regs_write)
+		ret = priv->crtc_funcs[pipe]->regs_write(crtc, address, val);
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+static const struct file_operations rockchip_drm_debugfs_regs_write_ops = {
+	.owner = THIS_MODULE,
+	.open = rockchip_drm_debugfs_regs_write_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = rockchip_drm_debugfs_regs_write,
+};
+
+int rockchip_drm_debugfs_add_regs_write(struct drm_crtc *crtc, struct dentry *root)
+{
+	struct dentry *ent;
+
+	ent = debugfs_create_file("regs_write", 0644, root, crtc,
+				  &rockchip_drm_debugfs_regs_write_ops);
+	if (!ent)
+		DRM_ERROR("Failed to add regs_write for debugfs\n");
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.h b/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.h
index 6e63da0a188c..2f8ec1677245 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.h
@@ -36,6 +36,7 @@ rockchip_drm_crtc_dump_plane_buffer(struct drm_crtc *crtc)
 }
 #endif
 int rockchip_drm_debugfs_add_color_bar(struct drm_crtc *crtc, struct dentry *root);
+int rockchip_drm_debugfs_add_regs_write(struct drm_crtc *crtc, struct dentry *root);
 #else
 static inline int
 rockchip_drm_add_dump_buffer(struct drm_crtc *crtc, struct dentry *root)
@@ -54,6 +55,12 @@ rockchip_drm_debugfs_add_color_bar(struct drm_crtc *crtc, struct dentry *root)
 {
 	return 0;
 }
+
+static inline int
+rockchip_drm_debugfs_add_regs_write(struct drm_crtc *crtc, struct dentry *root)
+{
+	return 0;
+}
 #endif
 
 #endif
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index 42e194b24574..b65781c36f96 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -491,6 +491,7 @@ struct rockchip_crtc_funcs {
 	int (*debugfs_dump)(struct drm_crtc *crtc, struct seq_file *s);
 	void (*regs_dump)(struct drm_crtc *crtc, struct seq_file *s);
 	void (*active_regs_dump)(struct drm_crtc *crtc, struct seq_file *s);
+	int (*regs_write)(struct drm_crtc *crtc, phys_addr_t address, u32 val);
 	enum drm_mode_status (*mode_valid)(struct drm_crtc *crtc,
 					   const struct drm_display_mode *mode,
 					   int output_type);