drivers/amlogic/drm/meson_debugfs.c - manifest_repos/kernel - Git at Google

 /*
  * drivers/amlogic/drm/meson_debugfs.c
  *
  * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
  *
  * 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.
  *
  */

 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #endif

 #include "meson_drv.h"
 #include "meson_crtc.h"
 #include "meson_plane.h"
 #include "meson_vpu_pipeline.h"

 #ifdef CONFIG_DEBUG_FS

 static int meson_dump_show(struct seq_file *sf, void *data)
 {
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

 	seq_puts(sf, "echo 1 > dump to enable the osd dump func\n");
 	seq_puts(sf, "echo 0 > dump to disable the osd dump func\n");
 	seq_printf(sf, "dump_enable: %d\n", amc->dump_enable);
 	seq_printf(sf, "dump_counts: %d\n", amc->dump_counts);
 	return 0;
 }

 static int meson_dump_open(struct inode *inode, struct file *file)
 {
 	struct drm_crtc *crtc = inode->i_private;

 	return single_open(file, meson_dump_show, crtc);
 }

 static ssize_t meson_dump_write(struct file *file, const char __user *ubuf,
 				size_t len, loff_t *offp)
 {
 	char buf[8];
 	int counts = 0;
 	struct seq_file *sf = file->private_data;
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

 	if (len > sizeof(buf) - 1)
 		return -EINVAL;

 	if (copy_from_user(buf, ubuf, len))
 		return -EFAULT;
 	if (buf[len - 1] == '\n')
 		buf[len - 1] = '\0';
 	buf[len] = '\0';

 	if (strncmp(buf, "0", 1) == 0) {
 		amc->dump_enable = 0;
 		DRM_INFO("disable the osd dump\n");
 	} else {
 		if (kstrtoint(buf, 0, &counts) == 0) {
 			amc->dump_counts = (counts > 0) ? counts : 0;
 			amc->dump_enable = (counts > 0) ? 1 : 0;
 		}
 	}

 	return len;
 }

 static const struct file_operations meson_dump_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_dump_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 	.write = meson_dump_write,
 };

 static int meson_regdump_show(struct seq_file *sf, void *data)
 {
 	int i;
 	struct meson_vpu_block *mvb;
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);
 	struct meson_vpu_pipeline *mvp1 = amc->pipeline;

 	for (i = 0; i < mvp1->num_blocks; i++) {
 		mvb = mvp1->mvbs[i];
 		if (!mvb)
 			continue;

 		seq_printf(sf, "*************%s*************\n", mvb->name);
 		if (mvb->ops && mvb->ops->dump_register)
 			mvb->ops->dump_register(mvb, sf);
 	}
 	return 0;
 }

 static int meson_regdump_open(struct inode *inode, struct file *file)
 {
 	struct drm_crtc *crtc = inode->i_private;

 	return single_open(file, meson_regdump_show, crtc);
 }

 static const struct file_operations meson_regdump_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_regdump_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 };

 static int meson_imgpath_show(struct seq_file *sf, void *data)
 {
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

 	seq_puts(sf, "echo /tmp/osd_path > imgpath to store the osd dump path\n");
 	seq_printf(sf, "imgpath: %s\n", amc->osddump_path);
 	return 0;
 }

 static int meson_imgpath_open(struct inode *inode, struct file *file)
 {
 	struct drm_crtc *crtc = inode->i_private;

 	return single_open(file, meson_imgpath_show, crtc);
 }

 static ssize_t meson_imgpath_write(struct file *file, const char __user *ubuf,
 				   size_t len, loff_t *offp)
 {
 	struct seq_file *sf = file->private_data;
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

 	if (len > sizeof(amc->osddump_path) - 1)
 		return -EINVAL;

 	if (copy_from_user(amc->osddump_path, ubuf, len))
 		return -EFAULT;
 	amc->osddump_path[len - 1] = '\0';

 	return len;
 }

 static const struct file_operations meson_imgpath_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_imgpath_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 	.write = meson_imgpath_write,
 };

 static int meson_blank_show(struct seq_file *sf, void *data)
 {
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

 	seq_puts(sf, "echo 1 > blank to blank the osd plane\n");
 	seq_puts(sf, "echo 0 > blank to unblank the osd plane\n");
 	seq_printf(sf, "blank_enable: %d\n", amc->blank_enable);
 	return 0;
 }

 static int meson_blank_open(struct inode *inode, struct file *file)
 {
 	struct drm_crtc *crtc = inode->i_private;

 	return single_open(file, meson_blank_show, crtc);
 }

 static ssize_t meson_blank_write(struct file *file, const char __user *ubuf,
 				 size_t len, loff_t *offp)
 {
 	char buf[4];
 	struct seq_file *sf = file->private_data;
 	struct drm_crtc *crtc = sf->private;
 	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

 	if (len > sizeof(buf) - 1)
 		return -EINVAL;

 	if (copy_from_user(buf, ubuf, len))
 		return -EFAULT;
 	if (buf[len - 1] == '\n')
 		buf[len - 1] = '\0';
 	buf[len] = '\0';

 	if (strncmp(buf, "1", 1) == 0) {
 		amc->blank_enable = 1;
 		DRM_INFO("enable the osd blank\n");
 	} else if (strncmp(buf, "0", 1) == 0) {
 		amc->blank_enable = 0;
 		DRM_INFO("disable the osd blank\n");
 	}

 	return len;
 }

 static const struct file_operations meson_blank_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_blank_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 	.write = meson_blank_write,
 };

 static int meson_osd_reverse_show(struct seq_file *sf, void *data)
 {
 	struct drm_plane *plane = sf->private;
 	struct am_osd_plane *amp = to_am_osd_plane(plane);

 	seq_puts(sf, "echo 1/2/3 > osd_reverse :reverse the osd xy/x/y\n");
 	seq_puts(sf, "echo 0 > osd_reverse to unreverse the osd plane\n");
 	seq_printf(sf, "osd_reverse: %d\n", amp->osd_reverse);
 	return 0;
 }

 static int meson_osd_reverse_open(struct inode *inode, struct file *file)
 {
 	struct drm_plane *plane = inode->i_private;

 	return single_open(file, meson_osd_reverse_show, plane);
 }

 static ssize_t meson_osd_reverse_write(struct file *file,
 				       const char __user *ubuf,
 				       size_t len, loff_t *offp)
 {
 	char buf[4];
 	struct seq_file *sf = file->private_data;
 	struct drm_plane *plane = sf->private;
 	struct am_osd_plane *amp = to_am_osd_plane(plane);

 	if (len > sizeof(buf) - 1)
 		return -EINVAL;

 	if (copy_from_user(buf, ubuf, len))
 		return -EFAULT;
 	if (buf[len - 1] == '\n')
 		buf[len - 1] = '\0';
 	buf[len] = '\0';

 	if (strncmp(buf, "1", 1) == 0) {
 		amp->osd_reverse = DRM_REFLECT_MASK;
 		DRM_INFO("enable the osd reverse\n");
 	} else if (strncmp(buf, "2", 1) == 0) {
 		amp->osd_reverse = DRM_REFLECT_X;
 		DRM_INFO("enable the osd reverse_x\n");
 	} else if (strncmp(buf, "3", 1) == 0) {
 		amp->osd_reverse = DRM_REFLECT_Y;
 		DRM_INFO("enable the osd reverse_y\n");
 	} else if (strncmp(buf, "0", 1) == 0) {
 		amp->osd_reverse = 0;
 		DRM_INFO("disable the osd reverse\n");
 	}

 	return len;
 }

 static const struct file_operations meson_osd_reverse_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_osd_reverse_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 	.write = meson_osd_reverse_write,
 };

 static int meson_osd_blend_bypass_show(struct seq_file *sf, void *data)
 {
 	struct drm_plane *plane = sf->private;
 	struct am_osd_plane *amp = to_am_osd_plane(plane);

 	seq_puts(sf, "echo 1/0 > osd_blend_bypass :enable/disable\n");
 	seq_printf(sf, "osd_blend_bypass: %d\n", amp->osd_blend_bypass);
 	return 0;
 }

 static int meson_osd_blend_bypass_open(struct inode *inode, struct file *file)
 {
 	struct drm_plane *plane = inode->i_private;

 	return single_open(file, meson_osd_blend_bypass_show, plane);
 }

 static ssize_t meson_osd_blend_bypass_write(struct file *file,
 					    const char __user *ubuf,
 					    size_t len, loff_t *offp)
 {
 	char buf[4];
 	struct seq_file *sf = file->private_data;
 	struct drm_plane *plane = sf->private;
 	struct am_osd_plane *amp = to_am_osd_plane(plane);

 	if (len > sizeof(buf) - 1)
 		return -EINVAL;

 	if (copy_from_user(buf, ubuf, len))
 		return -EFAULT;
 	if (buf[len - 1] == '\n')
 		buf[len - 1] = '\0';
 	buf[len] = '\0';

 	if (strncmp(buf, "1", 1) == 0) {
 		amp->osd_blend_bypass = 1;
 		DRM_INFO("enable the osd blend bypass\n");
 	} else if (strncmp(buf, "0", 1) == 0) {
 		amp->osd_blend_bypass = 0;
 		DRM_INFO("disable the osd blend bypass\n");
 	}

 	return len;
 }

 static const struct file_operations meson_osd_blend_bypass_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_osd_blend_bypass_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 	.write = meson_osd_blend_bypass_write,
 };

 u32 overwrite_reg[256];
 u32 overwrite_val[256];
 int overwrite_enable;
 int reg_num;

 static int meson_reg_debug_show(struct seq_file *sf, void *data)
 {
 	int i;

 	seq_puts(sf, "echo rv reg > reg_debug to read the register\n");
 	seq_puts(sf, "echo wv reg val > reg_debug to overwrite the register\n");
 	seq_puts(sf, "echo ow 1 > reg_debug to enable overwrite register\n");
 	seq_printf(sf, "\noverwrited status: %s\n",
 		   overwrite_enable ? "on" : "off");
 	if (overwrite_enable) {
 		for (i = 0; i < reg_num; i++)
 			seq_printf(sf, "reg[0x%04x]=0x%08x\n", overwrite_reg[i],
 				   overwrite_val[i]);
 	}
 	//seq_printf(sf, "blank_enable: %d\n", amc->blank_enable);
 	return 0;
 }

 static int meson_reg_debug_open(struct inode *inode, struct file *file)
 {
 	struct drm_crtc *crtc = inode->i_private;

 	return single_open(file, meson_reg_debug_show, crtc);
 }

 static void parse_param(char *buf_orig, char **parm)
 {
 	char *ps, *token;
 	unsigned int n = 0;
 	char delim1[3] = " ";
 	char delim2[2] = "\n";

 	ps = buf_orig;
 	strcat(delim1, delim2);
 	while (1) {
 		token = strsep(&ps, delim1);
 		if (!token)
 			break;
 		if (*token == '\0')
 			continue;
 		parm[n++] = token;
 	}
 }

 static ssize_t meson_reg_debug_write(struct file *file, const char __user *ubuf,
 					size_t len, loff_t *offp)
 {
 	char buf[64];
 	long val;
 	int i;
 	unsigned int reg_addr, reg_val;
 	char *bufp, *parm[8] = {NULL};

 	if (len > sizeof(buf) - 1)
 		return -EINVAL;

 	if (copy_from_user(buf, ubuf, len))
 		return -EFAULT;

 	buf[len] = '\0';

 	bufp = buf;
 	parse_param(bufp, (char **)&parm);
 	if (!strcmp(parm[0], "rv")) {
 		if (kstrtoul(parm[1], 16, &val) < 0)
 			return -EINVAL;

 		reg_addr = val;
 		DRM_INFO("reg[0x%04x]=0x%08x\n", reg_addr,
 			 meson_drm_read_reg(reg_addr));
 	} else if (!strcmp(parm[0], "wv")) {
 		if (kstrtoul(parm[1], 16, &val) < 0)
 			return -EINVAL;
 		reg_addr = val;

 		if (kstrtoul(parm[2], 16, &val) < 0)
 			return -EINVAL;

 		reg_val = val;
 		for (i = 0; i < reg_num; i++) {
 			if (overwrite_reg[i] == reg_addr) {
 				overwrite_val[i] = reg_val;
 				return len;
 			}
 		}

 		if (i == reg_num) {
 			overwrite_reg[i] = reg_addr;
 			overwrite_val[i] = reg_val;
 			reg_num++;
 		}
 	} else if (!strcmp(parm[0], "ow")) {
 		if (parm[1] && !strcmp(parm[1], "1"))
 			overwrite_enable = 1;
 	}

 	return len;
 }

 static const struct file_operations meson_reg_debug_fops = {
 	.owner = THIS_MODULE,
 	.open = meson_reg_debug_open,
 	.read = seq_read,
 	.llseek = seq_lseek,
 	.release = single_release,
 	.write = meson_reg_debug_write,
 };

 int meson_crtc_debugfs_init(struct drm_crtc *crtc, struct dentry *root)
 {
 	struct dentry *meson_vpu_root;
 	struct dentry *entry;

 	meson_vpu_root = debugfs_create_dir("vpu", root);

 	entry = debugfs_create_file("dump", 0644, meson_vpu_root, crtc,
 				    &meson_dump_fops);
 	if (!entry) {
 		DRM_ERROR("create dump node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}

 	entry = debugfs_create_file("reg_dump", 0400, meson_vpu_root, crtc,
 				    &meson_regdump_fops);
 	if (!entry) {
 		DRM_ERROR("create reg_dump node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}

 	entry = debugfs_create_file("imgpath", 0644, meson_vpu_root, crtc,
 				    &meson_imgpath_fops);
 	if (!entry) {
 		DRM_ERROR("create imgpath node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}

 	entry = debugfs_create_file("blank", 0644, meson_vpu_root, crtc,
 				    &meson_blank_fops);
 	if (!entry) {
 		DRM_ERROR("create blank node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}

 	entry = debugfs_create_file("debug", 0644, meson_vpu_root, crtc,
 					&meson_reg_debug_fops);
 	if (!entry) {
 		DRM_ERROR("create reg_debug node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}

 	return 0;
 }

 int meson_plane_debugfs_init(struct drm_plane *plane, struct dentry *root)
 {
 	struct dentry *meson_vpu_root;
 	struct dentry *entry;

 	meson_vpu_root = debugfs_create_dir(plane->name, root);

 	entry = debugfs_create_file("osd_reverse", 0644, meson_vpu_root, plane,
 				    &meson_osd_reverse_fops);
 	if (!entry) {
 		DRM_ERROR("create osd_reverse node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}
 	entry = debugfs_create_file("osd_blend_bypass", 0644,
 				    meson_vpu_root, plane,
 				    &meson_osd_blend_bypass_fops);
 	if (!entry) {
 		DRM_ERROR("create osd_blend_bypass node error\n");
 		debugfs_remove_recursive(meson_vpu_root);
 	}

 	return 0;
 }

 static int mm_show(struct seq_file *sf, void *arg)
 {
 	struct drm_info_node *node = (struct drm_info_node *)sf->private;
 	struct drm_device *dev = node->minor->dev;

 	return drm_mm_dump_table(sf,
 			&dev->vma_offset_manager->vm_addr_space_mm);
 }

 static struct drm_info_list meson_debugfs_list[] = {
 	{"mm", mm_show, 0},
 };

 int meson_debugfs_init(struct drm_minor *minor)
 {
 	int ret;
 	struct drm_crtc *crtc;
 	struct drm_plane *plane;
 	struct drm_device *dev = minor->dev;

 	ret = drm_debugfs_create_files(meson_debugfs_list,
 				       ARRAY_SIZE(meson_debugfs_list),
 					minor->debugfs_root, minor);
 	if (ret) {
 		DRM_ERROR("could not install meson_debugfs_list\n");
 		return ret;
 	}

 	drm_for_each_crtc(crtc, dev) {
 		meson_crtc_debugfs_init(crtc, minor->debugfs_root);
 	}
 	drm_for_each_plane(plane, dev) {
 		meson_plane_debugfs_init(plane, minor->debugfs_root);
 	}
 	return ret;
 }

 void meson_debugfs_cleanup(struct drm_minor *minor)
 {
 	drm_debugfs_remove_files(meson_debugfs_list,
 				 ARRAY_SIZE(meson_debugfs_list), minor);
 }
 #endif
	/*
	* drivers/amlogic/drm/meson_debugfs.c
	*
	* Copyright (C) 2017 Amlogic, Inc. All rights reserved.
	*
	* 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.
	*
	*/

	#ifdef CONFIG_DEBUG_FS
	#include <linux/debugfs.h>
	#include <linux/seq_file.h>
	#endif

	#include "meson_drv.h"
	#include "meson_crtc.h"
	#include "meson_plane.h"
	#include "meson_vpu_pipeline.h"

	#ifdef CONFIG_DEBUG_FS

	static int meson_dump_show(struct seq_file sf, void data)
	{
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

	seq_puts(sf, "echo 1 > dump to enable the osd dump func\n");
	seq_puts(sf, "echo 0 > dump to disable the osd dump func\n");
	seq_printf(sf, "dump_enable: %d\n", amc->dump_enable);
	seq_printf(sf, "dump_counts: %d\n", amc->dump_counts);
	return 0;
	}

	static int meson_dump_open(struct inode inode, struct file file)
	{
	struct drm_crtc *crtc = inode->i_private;

	return single_open(file, meson_dump_show, crtc);
	}

	static ssize_t meson_dump_write(struct file file, const char __user ubuf,
	size_t len, loff_t *offp)
	{
	char buf[8];
	int counts = 0;
	struct seq_file *sf = file->private_data;
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

	if (len > sizeof(buf) - 1)
	return -EINVAL;

	if (copy_from_user(buf, ubuf, len))
	return -EFAULT;
	if (buf[len - 1] == '\n')
	buf[len - 1] = '\0';
	buf[len] = '\0';

	if (strncmp(buf, "0", 1) == 0) {
	amc->dump_enable = 0;
	DRM_INFO("disable the osd dump\n");
	} else {
	if (kstrtoint(buf, 0, &counts) == 0) {
	amc->dump_counts = (counts > 0) ? counts : 0;
	amc->dump_enable = (counts > 0) ? 1 : 0;
	}
	}

	return len;
	}

	static const struct file_operations meson_dump_fops = {
	.owner = THIS_MODULE,
	.open = meson_dump_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = meson_dump_write,
	};

	static int meson_regdump_show(struct seq_file sf, void data)
	{
	int i;
	struct meson_vpu_block *mvb;
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);
	struct meson_vpu_pipeline *mvp1 = amc->pipeline;

	for (i = 0; i < mvp1->num_blocks; i++) {
	mvb = mvp1->mvbs[i];
	if (!mvb)
	continue;

	seq_printf(sf, "***********%s***********\n", mvb->name);
	if (mvb->ops && mvb->ops->dump_register)
	mvb->ops->dump_register(mvb, sf);
	}
	return 0;
	}

	static int meson_regdump_open(struct inode inode, struct file file)
	{
	struct drm_crtc *crtc = inode->i_private;

	return single_open(file, meson_regdump_show, crtc);
	}

	static const struct file_operations meson_regdump_fops = {
	.owner = THIS_MODULE,
	.open = meson_regdump_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	static int meson_imgpath_show(struct seq_file sf, void data)
	{
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

	seq_puts(sf, "echo /tmp/osd_path > imgpath to store the osd dump path\n");
	seq_printf(sf, "imgpath: %s\n", amc->osddump_path);
	return 0;
	}

	static int meson_imgpath_open(struct inode inode, struct file file)
	{
	struct drm_crtc *crtc = inode->i_private;

	return single_open(file, meson_imgpath_show, crtc);
	}

	static ssize_t meson_imgpath_write(struct file file, const char __user ubuf,
	size_t len, loff_t *offp)
	{
	struct seq_file *sf = file->private_data;
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

	if (len > sizeof(amc->osddump_path) - 1)
	return -EINVAL;

	if (copy_from_user(amc->osddump_path, ubuf, len))
	return -EFAULT;
	amc->osddump_path[len - 1] = '\0';

	return len;
	}

	static const struct file_operations meson_imgpath_fops = {
	.owner = THIS_MODULE,
	.open = meson_imgpath_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = meson_imgpath_write,
	};

	static int meson_blank_show(struct seq_file sf, void data)
	{
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

	seq_puts(sf, "echo 1 > blank to blank the osd plane\n");
	seq_puts(sf, "echo 0 > blank to unblank the osd plane\n");
	seq_printf(sf, "blank_enable: %d\n", amc->blank_enable);
	return 0;
	}

	static int meson_blank_open(struct inode inode, struct file file)
	{
	struct drm_crtc *crtc = inode->i_private;

	return single_open(file, meson_blank_show, crtc);
	}

	static ssize_t meson_blank_write(struct file file, const char __user ubuf,
	size_t len, loff_t *offp)
	{
	char buf[4];
	struct seq_file *sf = file->private_data;
	struct drm_crtc *crtc = sf->private;
	struct am_meson_crtc *amc = to_am_meson_crtc(crtc);

	if (len > sizeof(buf) - 1)
	return -EINVAL;

	if (copy_from_user(buf, ubuf, len))
	return -EFAULT;
	if (buf[len - 1] == '\n')
	buf[len - 1] = '\0';
	buf[len] = '\0';

	if (strncmp(buf, "1", 1) == 0) {
	amc->blank_enable = 1;
	DRM_INFO("enable the osd blank\n");
	} else if (strncmp(buf, "0", 1) == 0) {
	amc->blank_enable = 0;
	DRM_INFO("disable the osd blank\n");
	}

	return len;
	}

	static const struct file_operations meson_blank_fops = {
	.owner = THIS_MODULE,
	.open = meson_blank_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = meson_blank_write,
	};

	static int meson_osd_reverse_show(struct seq_file sf, void data)
	{
	struct drm_plane *plane = sf->private;
	struct am_osd_plane *amp = to_am_osd_plane(plane);

	seq_puts(sf, "echo 1/2/3 > osd_reverse :reverse the osd xy/x/y\n");
	seq_puts(sf, "echo 0 > osd_reverse to unreverse the osd plane\n");
	seq_printf(sf, "osd_reverse: %d\n", amp->osd_reverse);
	return 0;
	}

	static int meson_osd_reverse_open(struct inode inode, struct file file)
	{
	struct drm_plane *plane = inode->i_private;

	return single_open(file, meson_osd_reverse_show, plane);
	}

	static ssize_t meson_osd_reverse_write(struct file *file,
	const char __user *ubuf,
	size_t len, loff_t *offp)
	{
	char buf[4];
	struct seq_file *sf = file->private_data;
	struct drm_plane *plane = sf->private;
	struct am_osd_plane *amp = to_am_osd_plane(plane);

	if (len > sizeof(buf) - 1)
	return -EINVAL;

	if (copy_from_user(buf, ubuf, len))
	return -EFAULT;
	if (buf[len - 1] == '\n')
	buf[len - 1] = '\0';
	buf[len] = '\0';

	if (strncmp(buf, "1", 1) == 0) {
	amp->osd_reverse = DRM_REFLECT_MASK;
	DRM_INFO("enable the osd reverse\n");
	} else if (strncmp(buf, "2", 1) == 0) {
	amp->osd_reverse = DRM_REFLECT_X;
	DRM_INFO("enable the osd reverse_x\n");
	} else if (strncmp(buf, "3", 1) == 0) {
	amp->osd_reverse = DRM_REFLECT_Y;
	DRM_INFO("enable the osd reverse_y\n");
	} else if (strncmp(buf, "0", 1) == 0) {
	amp->osd_reverse = 0;
	DRM_INFO("disable the osd reverse\n");
	}

	return len;
	}

	static const struct file_operations meson_osd_reverse_fops = {
	.owner = THIS_MODULE,
	.open = meson_osd_reverse_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = meson_osd_reverse_write,
	};

	static int meson_osd_blend_bypass_show(struct seq_file sf, void data)
	{
	struct drm_plane *plane = sf->private;
	struct am_osd_plane *amp = to_am_osd_plane(plane);

	seq_puts(sf, "echo 1/0 > osd_blend_bypass :enable/disable\n");
	seq_printf(sf, "osd_blend_bypass: %d\n", amp->osd_blend_bypass);
	return 0;
	}

	static int meson_osd_blend_bypass_open(struct inode inode, struct file file)
	{
	struct drm_plane *plane = inode->i_private;

	return single_open(file, meson_osd_blend_bypass_show, plane);
	}

	static ssize_t meson_osd_blend_bypass_write(struct file *file,
	const char __user *ubuf,
	size_t len, loff_t *offp)
	{
	char buf[4];
	struct seq_file *sf = file->private_data;
	struct drm_plane *plane = sf->private;
	struct am_osd_plane *amp = to_am_osd_plane(plane);

	if (len > sizeof(buf) - 1)
	return -EINVAL;

	if (copy_from_user(buf, ubuf, len))
	return -EFAULT;
	if (buf[len - 1] == '\n')
	buf[len - 1] = '\0';
	buf[len] = '\0';

	if (strncmp(buf, "1", 1) == 0) {
	amp->osd_blend_bypass = 1;
	DRM_INFO("enable the osd blend bypass\n");
	} else if (strncmp(buf, "0", 1) == 0) {
	amp->osd_blend_bypass = 0;
	DRM_INFO("disable the osd blend bypass\n");
	}

	return len;
	}

	static const struct file_operations meson_osd_blend_bypass_fops = {
	.owner = THIS_MODULE,
	.open = meson_osd_blend_bypass_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = meson_osd_blend_bypass_write,
	};

	u32 overwrite_reg[256];
	u32 overwrite_val[256];
	int overwrite_enable;
	int reg_num;

	static int meson_reg_debug_show(struct seq_file sf, void data)
	{
	int i;

	seq_puts(sf, "echo rv reg > reg_debug to read the register\n");
	seq_puts(sf, "echo wv reg val > reg_debug to overwrite the register\n");
	seq_puts(sf, "echo ow 1 > reg_debug to enable overwrite register\n");
	seq_printf(sf, "\noverwrited status: %s\n",
	overwrite_enable ? "on" : "off");
	if (overwrite_enable) {
	for (i = 0; i < reg_num; i++)
	seq_printf(sf, "reg[0x%04x]=0x%08x\n", overwrite_reg[i],
	overwrite_val[i]);
	}
	//seq_printf(sf, "blank_enable: %d\n", amc->blank_enable);
	return 0;
	}

	static int meson_reg_debug_open(struct inode inode, struct file file)
	{
	struct drm_crtc *crtc = inode->i_private;

	return single_open(file, meson_reg_debug_show, crtc);
	}

	static void parse_param(char buf_orig, char *parm)
	{
	char ps, token;
	unsigned int n = 0;
	char delim1[3] = " ";
	char delim2[2] = "\n";

	ps = buf_orig;
	strcat(delim1, delim2);
	while (1) {
	token = strsep(&ps, delim1);
	if (!token)
	break;
	if (*token == '\0')
	continue;
	parm[n++] = token;
	}
	}

	static ssize_t meson_reg_debug_write(struct file file, const char __user ubuf,
	size_t len, loff_t *offp)
	{
	char buf[64];
	long val;
	int i;
	unsigned int reg_addr, reg_val;
	char bufp, parm[8] = {NULL};

	if (len > sizeof(buf) - 1)
	return -EINVAL;

	if (copy_from_user(buf, ubuf, len))
	return -EFAULT;

	buf[len] = '\0';

	bufp = buf;
	parse_param(bufp, (char **)&parm);
	if (!strcmp(parm[0], "rv")) {
	if (kstrtoul(parm[1], 16, &val) < 0)
	return -EINVAL;

	reg_addr = val;
	DRM_INFO("reg[0x%04x]=0x%08x\n", reg_addr,
	meson_drm_read_reg(reg_addr));
	} else if (!strcmp(parm[0], "wv")) {
	if (kstrtoul(parm[1], 16, &val) < 0)
	return -EINVAL;
	reg_addr = val;

	if (kstrtoul(parm[2], 16, &val) < 0)
	return -EINVAL;

	reg_val = val;
	for (i = 0; i < reg_num; i++) {
	if (overwrite_reg[i] == reg_addr) {
	overwrite_val[i] = reg_val;
	return len;
	}
	}

	if (i == reg_num) {
	overwrite_reg[i] = reg_addr;
	overwrite_val[i] = reg_val;
	reg_num++;
	}
	} else if (!strcmp(parm[0], "ow")) {
	if (parm[1] && !strcmp(parm[1], "1"))
	overwrite_enable = 1;
	}

	return len;
	}

	static const struct file_operations meson_reg_debug_fops = {
	.owner = THIS_MODULE,
	.open = meson_reg_debug_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = meson_reg_debug_write,
	};

	int meson_crtc_debugfs_init(struct drm_crtc crtc, struct dentry root)
	{
	struct dentry *meson_vpu_root;
	struct dentry *entry;

	meson_vpu_root = debugfs_create_dir("vpu", root);

	entry = debugfs_create_file("dump", 0644, meson_vpu_root, crtc,
	&meson_dump_fops);
	if (!entry) {
	DRM_ERROR("create dump node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}

	entry = debugfs_create_file("reg_dump", 0400, meson_vpu_root, crtc,
	&meson_regdump_fops);
	if (!entry) {
	DRM_ERROR("create reg_dump node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}

	entry = debugfs_create_file("imgpath", 0644, meson_vpu_root, crtc,
	&meson_imgpath_fops);
	if (!entry) {
	DRM_ERROR("create imgpath node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}

	entry = debugfs_create_file("blank", 0644, meson_vpu_root, crtc,
	&meson_blank_fops);
	if (!entry) {
	DRM_ERROR("create blank node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}

	entry = debugfs_create_file("debug", 0644, meson_vpu_root, crtc,
	&meson_reg_debug_fops);
	if (!entry) {
	DRM_ERROR("create reg_debug node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}

	return 0;
	}

	int meson_plane_debugfs_init(struct drm_plane plane, struct dentry root)
	{
	struct dentry *meson_vpu_root;
	struct dentry *entry;

	meson_vpu_root = debugfs_create_dir(plane->name, root);

	entry = debugfs_create_file("osd_reverse", 0644, meson_vpu_root, plane,
	&meson_osd_reverse_fops);
	if (!entry) {
	DRM_ERROR("create osd_reverse node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}
	entry = debugfs_create_file("osd_blend_bypass", 0644,
	meson_vpu_root, plane,
	&meson_osd_blend_bypass_fops);
	if (!entry) {
	DRM_ERROR("create osd_blend_bypass node error\n");
	debugfs_remove_recursive(meson_vpu_root);
	}

	return 0;
	}

	static int mm_show(struct seq_file sf, void arg)
	{
	struct drm_info_node node = (struct drm_info_node )sf->private;
	struct drm_device *dev = node->minor->dev;

	return drm_mm_dump_table(sf,
	&dev->vma_offset_manager->vm_addr_space_mm);
	}

	static struct drm_info_list meson_debugfs_list[] = {
	{"mm", mm_show, 0},
	};

	int meson_debugfs_init(struct drm_minor *minor)
	{
	int ret;
	struct drm_crtc *crtc;
	struct drm_plane *plane;
	struct drm_device *dev = minor->dev;

	ret = drm_debugfs_create_files(meson_debugfs_list,
	ARRAY_SIZE(meson_debugfs_list),
	minor->debugfs_root, minor);
	if (ret) {
	DRM_ERROR("could not install meson_debugfs_list\n");
	return ret;
	}

	drm_for_each_crtc(crtc, dev) {
	meson_crtc_debugfs_init(crtc, minor->debugfs_root);
	}
	drm_for_each_plane(plane, dev) {
	meson_plane_debugfs_init(plane, minor->debugfs_root);
	}
	return ret;
	}

	void meson_debugfs_cleanup(struct drm_minor *minor)
	{
	drm_debugfs_remove_files(meson_debugfs_list,
	ARRAY_SIZE(meson_debugfs_list), minor);
	}
	#endif