diff -drupN a/drivers/mpp/sunxi-mpp.c b/drivers/mpp/sunxi-mpp.c
--- a/drivers/mpp/sunxi-mpp.c	1970-01-01 03:00:00.000000000 +0300
+++ b/drivers/mpp/sunxi-mpp.c	2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,70 @@
+/*
+ * drivers/mpp/sunxi-mpp.c
+ *
+ * Copyright (c) 2014 softwinner.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/cpu.h>
+#include <linux/of.h>
+#include <linux/debugfs.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/mpp.h>
+
+enum {
+	DEBUG_NONE = 0,
+	DEBUG_MPP = 1,
+};
+static int debug_mask = DEBUG_NONE;
+module_param(debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
+#define MPP_DBG(mask, format, args...)				\
+	do {								\
+		if (mask & debug_mask)					\
+			pr_info("[mpp] "format, ##args);		\
+	} while (0)
+
+#define MPP_ERR(format, args...) \
+	pr_err("[mpp] error:"format, ##args)
+
+#ifdef CONFIG_DEBUG_FS
+struct dentry *debugfs_mpp_root;
+EXPORT_SYMBOL(debugfs_mpp_root);
+
+static int __init mpp_debugfs_init(void)
+{
+	MPP_DBG(DEBUG_MPP, "call %s.\n", __func__);
+	WARN_ON(!debugfs_initialized());
+
+	debugfs_mpp_root = debugfs_create_dir("mpp", 0);
+	if (!debugfs_mpp_root)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void __exit mpp_debugfs_exit(void)
+{
+	MPP_DBG(DEBUG_MPP, "call %s.\n", __func__);
+	debugfs_remove_recursive(debugfs_mpp_root);
+}
+
+subsys_initcall(mpp_debugfs_init);
+module_exit(mpp_debugfs_exit);
+#endif /* CONFIG_DEBUG_FS */
+
+MODULE_DESCRIPTION("mpp driver for sunxi SOCs");
+MODULE_LICENSE("GPL");