android_kernel_samsung_msm8976/drivers/video/msm/mdss/mdss_debug.c

/* Copyright (c) 2009-2017, The Linux Foundation. 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 version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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.
 *
 */

#define pr_fmt(fmt)	"%s: " fmt, __func__

#include <linux/debugfs.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/uaccess.h>

#include "mdss.h"
#include "mdss_mdp.h"
#include "mdss_mdp_hwio.h"
#include "mdss_debug.h"
#include "mdss_dsi.h"

#define DEFAULT_BASE_REG_CNT 0x100
#define GROUP_BYTES 4
#define ROW_BYTES 16
#define MAX_VSYNC_COUNT 0xFFFFFFF

#define DEFAULT_READ_PANEL_POWER_MODE_REG 0x0A
#define PANEL_REG_ADDR_LEN 8
#define PANEL_REG_FORMAT_LEN 5
#define PANEL_TX_MAX_BUF 256
#define PANEL_CMD_MIN_TX_COUNT 2
#define PANEL_DATA_NODE_LEN 80

static DEFINE_MUTEX(mdss_debug_lock);

/* Hex number + whitespace */
#define NEXT_VALUE_OFFSET 3

static char panel_reg[2] = {DEFAULT_READ_PANEL_POWER_MODE_REG, 0x00};

static int panel_debug_base_open(struct inode *inode, struct file *file)
{
	/* non-seekable */
	file->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
	file->private_data = inode->i_private;
	return 0;
}

static int panel_debug_base_release(struct inode *inode, struct file *file)
{
	struct mdss_debug_base *dbg = file->private_data;
	mutex_lock(&mdss_debug_lock);
	if (dbg && dbg->buf) {
		kfree(dbg->buf);
		dbg->buf_len = 0;
		dbg->buf = NULL;
	}
	mutex_unlock(&mdss_debug_lock);
	return 0;
}

static ssize_t panel_debug_base_offset_write(struct file *file,
		    const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	u32 off = 0;
	u32 cnt = DEFAULT_BASE_REG_CNT;
	char buf[PANEL_TX_MAX_BUF] = {0x0};

	if (!dbg)
		return -ENODEV;

	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	if (sscanf(buf, "%x %u", &off, &cnt) != 2)
		return -EFAULT;

	if (off > dbg->max_offset)
		return -EINVAL;

	if (cnt > (dbg->max_offset - off))
		cnt = dbg->max_offset - off;

	mutex_lock(&mdss_debug_lock);
	dbg->off = off;
	dbg->cnt = cnt;
	mutex_unlock(&mdss_debug_lock);

	pr_debug("offset=%x cnt=%d\n", off, cnt);

	return count;
}

static ssize_t panel_debug_base_offset_read(struct file *file,
			char __user *buff, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	int len = 0;
	char buf[PANEL_TX_MAX_BUF] = {0x0};

	if (!dbg)
		return -ENODEV;

	if (*ppos)
		return 0;	/* the end */

	mutex_lock(&mdss_debug_lock);
	len = snprintf(buf, sizeof(buf), "0x%02zx %zx\n", dbg->off, dbg->cnt);
	if (len < 0 || len >= sizeof(buf)) {
		mutex_unlock(&mdss_debug_lock);
		return 0;
	}

	if ((count < sizeof(buf)) || copy_to_user(buff, buf, len)) {
		mutex_unlock(&mdss_debug_lock);
		return -EFAULT;
	}

	*ppos += len;	/* increase offset */

	mutex_unlock(&mdss_debug_lock);
	return len;
}

static ssize_t panel_debug_base_reg_write(struct file *file,
		const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	char buf[PANEL_TX_MAX_BUF] = {0x0};
	char reg[PANEL_TX_MAX_BUF] = {0x0};
	u32 len = 0, value = 0;
	char *bufp;

	struct mdss_data_type *mdata = mdss_res;
	struct mdss_mdp_ctl *ctl;
	struct mdss_dsi_ctrl_pdata *ctrl_pdata;
	struct dsi_cmd_desc dsi_write_cmd = {
		{0/*data type*/, 1, 0, 0, 0, 0/* len */}, reg};
	struct dcs_cmd_req cmdreq;

	if (!dbg || !mdata)
		return -ENODEV;

	/* get command string from user */
	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	bufp = buf;
	/* End of a hex value in given string */
	bufp[NEXT_VALUE_OFFSET - 1] = 0;
	while (kstrtouint(bufp, 16, &value) == 0) {
		reg[len++] = value;
		if (len >= PANEL_TX_MAX_BUF) {
			pr_err("wrong input reg len\n");
			return -EFAULT;
		}
		bufp += NEXT_VALUE_OFFSET;
		if ((bufp >= (buf + count)) || (bufp < buf)) {
			pr_warn("%s,buffer out-of-bounds\n", __func__);
			break;
		}
		/* End of a hex value in given string */
		bufp[NEXT_VALUE_OFFSET - 1] = 0;
	}
	if (len < PANEL_CMD_MIN_TX_COUNT) {
		pr_err("wrong input reg len\n");
		return -EFAULT;
	}

	/* put command to cmdlist */
	dsi_write_cmd.dchdr.dtype = dbg->cmd_data_type;
	dsi_write_cmd.dchdr.dlen = len;
	dsi_write_cmd.payload = reg;

	cmdreq.cmds = &dsi_write_cmd;
	cmdreq.cmds_cnt = 1;
	cmdreq.flags = CMD_REQ_COMMIT;
	cmdreq.rlen = 0;
	cmdreq.cb = NULL;

	ctl = mdata->ctl_off + 0;
	ctrl_pdata = container_of(ctl->panel_data,
		struct mdss_dsi_ctrl_pdata, panel_data);

	if (mdata->debug_inf.debug_enable_clock)
		mdata->debug_inf.debug_enable_clock(1);

	if (ctrl_pdata->ctrl_state & CTRL_STATE_PANEL_INIT)
		mdss_dsi_cmdlist_put(ctrl_pdata, &cmdreq);

	if (mdata->debug_inf.debug_enable_clock)
		mdata->debug_inf.debug_enable_clock(0);

	return count;
}

static ssize_t panel_debug_base_reg_read(struct file *file,
			char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	u32 i, len = 0, reg_buf_len = 0;
	char *panel_reg_buf, *rx_buf;
	struct mdss_data_type *mdata = mdss_res;
	struct mdss_mdp_ctl *ctl = mdata->ctl_off + 0;
	struct mdss_panel_data *panel_data = ctl->panel_data;
	struct mdss_dsi_ctrl_pdata *ctrl_pdata = container_of(panel_data,
					struct mdss_dsi_ctrl_pdata, panel_data);
	int rc = -EFAULT;

	if (!dbg)
		return -ENODEV;

	mutex_lock(&mdss_debug_lock);
	if (!dbg->cnt) {
		mutex_unlock(&mdss_debug_lock);
		return 0;
	}

	if (*ppos) {
		mutex_unlock(&mdss_debug_lock);
		return 0;	/* the end */
	}

	/* '0x' + 2 digit + blank = 5 bytes for each number */
	reg_buf_len = (dbg->cnt * PANEL_REG_FORMAT_LEN)
		    + PANEL_REG_ADDR_LEN + 1;
	rx_buf = kzalloc(dbg->cnt, GFP_KERNEL);
	panel_reg_buf = kzalloc(reg_buf_len, GFP_KERNEL);

	if (!rx_buf || !panel_reg_buf) {
		pr_err("not enough memory to hold panel reg dump\n");
		rc = -ENOMEM;
		goto read_reg_fail;
	}

	if (mdata->debug_inf.debug_enable_clock)
		mdata->debug_inf.debug_enable_clock(1);

	panel_reg[0] = dbg->off;
	mdss_dsi_panel_cmd_read(ctrl_pdata, panel_reg[0], panel_reg[1],
				NULL, rx_buf, dbg->cnt);

	len = scnprintf(panel_reg_buf, reg_buf_len, "0x%02zx: ", dbg->off);

	for (i = 0; (len < reg_buf_len) && (i < ctrl_pdata->rx_len); i++)
		len += scnprintf(panel_reg_buf + len, reg_buf_len - len,
				"0x%02x ", rx_buf[i]);

	if (len)
		panel_reg_buf[len - 1] = '\n';

	if (mdata->debug_inf.debug_enable_clock)
		mdata->debug_inf.debug_enable_clock(0);

	if ((count < reg_buf_len)
			|| (copy_to_user(user_buf, panel_reg_buf, len)))
		goto read_reg_fail;

	kfree(rx_buf);
	kfree(panel_reg_buf);

	*ppos += len;	/* increase offset */
	mutex_unlock(&mdss_debug_lock);
	return len;

read_reg_fail:
	kfree(rx_buf);
	kfree(panel_reg_buf);
	mutex_unlock(&mdss_debug_lock);
	return rc;
}

static const struct file_operations panel_off_fops = {
	.open = panel_debug_base_open,
	.release = panel_debug_base_release,
	.read = panel_debug_base_offset_read,
	.write = panel_debug_base_offset_write,
};

static const struct file_operations panel_reg_fops = {
	.open = panel_debug_base_open,
	.release = panel_debug_base_release,
	.read = panel_debug_base_reg_read,
	.write = panel_debug_base_reg_write,
};

int panel_debug_register_base(const char *name, void __iomem *base,
			     size_t max_offset)
{
	struct mdss_data_type *mdata = mdss_res;
	struct mdss_debug_data *mdd;
	struct mdss_debug_base *dbg;
	struct dentry *ent_off, *ent_reg, *ent_type;
	char dn[PANEL_DATA_NODE_LEN] = "";
	int prefix_len = 0;

	if (!mdata || !mdata->debug_inf.debug_data)
		return -ENODEV;

	mdd = mdata->debug_inf.debug_data;

	dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
	if (!dbg)
		return -ENOMEM;

	dbg->base = base;
	dbg->max_offset = max_offset;
	dbg->off = 0x0a;
	dbg->cnt = 0x01;
	dbg->cmd_data_type = DTYPE_DCS_LWRITE;

	if (name)
		prefix_len = snprintf(dn, sizeof(dn), "%s_", name);

	strlcpy(dn + prefix_len, "cmd_data_type", sizeof(dn) - prefix_len);
	ent_type = debugfs_create_x8(dn, 0644, mdd->root,
		(u8 *)&dbg->cmd_data_type);

	if (IS_ERR_OR_NULL(ent_type)) {
		pr_err("debugfs_create_file: data_type fail\n");
		goto type_fail;
	}

	strlcpy(dn + prefix_len, "off", sizeof(dn) - prefix_len);
	ent_off = debugfs_create_file(dn, 0644, mdd->root,
					dbg, &panel_off_fops);

	if (IS_ERR_OR_NULL(ent_off)) {
		pr_err("debugfs_create_file: offset fail\n");
		goto off_fail;
	}

	strlcpy(dn + prefix_len, "reg", sizeof(dn) - prefix_len);
	ent_reg = debugfs_create_file(dn, 0644, mdd->root,
					dbg, &panel_reg_fops);
	if (IS_ERR_OR_NULL(ent_reg)) {
		pr_err("debugfs_create_file: reg fail\n");
		goto reg_fail;
	}

	list_add(&dbg->head, &mdd->base_list);

	return 0;

reg_fail:
	debugfs_remove(ent_off);
off_fail:
	debugfs_remove(ent_type);
type_fail:
	kfree(dbg);
	return -ENODEV;
}

static int mdss_debug_base_open(struct inode *inode, struct file *file)
{
	/* non-seekable */
	file->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
	file->private_data = inode->i_private;
	return 0;
}

static int mdss_debug_base_release(struct inode *inode, struct file *file)
{
	struct mdss_debug_base *dbg = file->private_data;
	mutex_lock(&mdss_debug_lock);
	if (dbg && dbg->buf) {
		kfree(dbg->buf);
		dbg->buf_len = 0;
		dbg->buf = NULL;
	}
	mutex_unlock(&mdss_debug_lock);
	return 0;
}

static ssize_t mdss_debug_base_offset_write(struct file *file,
		    const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	u32 off = 0;
	u32 cnt = DEFAULT_BASE_REG_CNT;
	char buf[24];

	if (!dbg)
		return -ENODEV;

	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	sscanf(buf, "%5x %x", &off, &cnt);

	if (off > dbg->max_offset)
		return -EINVAL;

	if (cnt > (dbg->max_offset - off))
		cnt = dbg->max_offset - off;

	mutex_lock(&mdss_debug_lock);
	dbg->off = off;
	dbg->cnt = cnt;
	mutex_unlock(&mdss_debug_lock);

	pr_debug("offset=%x cnt=%x\n", off, cnt);

	return count;
}

static ssize_t mdss_debug_base_offset_read(struct file *file,
			char __user *buff, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	int len = 0;
	char buf[24] = {'\0'};

	if (!dbg)
		return -ENODEV;

	if (*ppos)
		return 0;	/* the end */

	mutex_lock(&mdss_debug_lock);
	len = snprintf(buf, sizeof(buf), "0x%08zx %zx\n", dbg->off, dbg->cnt);
	if (len < 0 || len >= sizeof(buf)) {
		mutex_unlock(&mdss_debug_lock);
		return 0;
	}

	if ((count < sizeof(buf)) || copy_to_user(buff, buf, len)) {
		mutex_unlock(&mdss_debug_lock);
		return -EFAULT;
	}

	*ppos += len;	/* increase offset */

	mutex_unlock(&mdss_debug_lock);
	return len;
}

static ssize_t mdss_debug_base_reg_write(struct file *file,
		const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	struct mdss_data_type *mdata = mdss_res;
	size_t off;
	u32 data, cnt;
	char buf[24];

	if (!dbg || !mdata)
		return -ENODEV;

	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	cnt = sscanf(buf, "%zx %x", &off, &data);

	if (cnt < 2)
		return -EFAULT;

	if (off >= dbg->max_offset)
		return -EFAULT;

	if (mdata->debug_inf.debug_enable_clock)
		mdata->debug_inf.debug_enable_clock(1);

	writel_relaxed(data, dbg->base + off);

	if (mdata->debug_inf.debug_enable_clock)
		mdata->debug_inf.debug_enable_clock(0);

	pr_debug("addr=%zx data=%x\n", off, data);

	return count;
}

static ssize_t mdss_debug_base_reg_read(struct file *file,
			char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_debug_base *dbg = file->private_data;
	struct mdss_data_type *mdata = mdss_res;
	size_t len;

	if (!dbg || !mdata) {
		pr_err("invalid handle\n");
		return -ENODEV;
	}

	mutex_lock(&mdss_debug_lock);

	if (!dbg->buf) {
		char dump_buf[64];
		char *ptr;
		int cnt, tot;

		dbg->buf_len = sizeof(dump_buf) *
			DIV_ROUND_UP(dbg->cnt, ROW_BYTES);
		dbg->buf = kzalloc(dbg->buf_len, GFP_KERNEL);

		if (!dbg->buf) {
			pr_err("not enough memory to hold reg dump\n");
			mutex_unlock(&mdss_debug_lock);
			return -ENOMEM;
		}

		ptr = dbg->base + dbg->off;
		tot = 0;

		if (mdata->debug_inf.debug_enable_clock)
			mdata->debug_inf.debug_enable_clock(1);

		for (cnt = dbg->cnt; cnt > 0; cnt -= ROW_BYTES) {
			hex_dump_to_buffer(ptr, min(cnt, ROW_BYTES),
					   ROW_BYTES, GROUP_BYTES, dump_buf,
					   sizeof(dump_buf), false);
			len = scnprintf(dbg->buf + tot, dbg->buf_len - tot,
					"0x%08x: %s\n",
					((int) (unsigned long) ptr) -
					((int) (unsigned long) dbg->base),
					dump_buf);

			ptr += ROW_BYTES;
			tot += len;
			if (tot >= dbg->buf_len)
				break;
		}
		if (mdata->debug_inf.debug_enable_clock)
			mdata->debug_inf.debug_enable_clock(0);

		dbg->buf_len = tot;
	}

	if (*ppos >= dbg->buf_len) {
		mutex_unlock(&mdss_debug_lock);
		return 0; /* done reading */
	}

	len = min(count, dbg->buf_len - (size_t) *ppos);
	if (copy_to_user(user_buf, dbg->buf + *ppos, len)) {
		pr_err("failed to copy to user\n");
		mutex_unlock(&mdss_debug_lock);
		return -EFAULT;
	}

	*ppos += len; /* increase offset */

	mutex_unlock(&mdss_debug_lock);
	return len;
}

static const struct file_operations mdss_off_fops = {
	.open = mdss_debug_base_open,
	.release = mdss_debug_base_release,
	.read = mdss_debug_base_offset_read,
	.write = mdss_debug_base_offset_write,
};

static const struct file_operations mdss_reg_fops = {
	.open = mdss_debug_base_open,
	.release = mdss_debug_base_release,
	.read = mdss_debug_base_reg_read,
	.write = mdss_debug_base_reg_write,
};

int mdss_debug_register_base(const char *name, void __iomem *base,
	size_t max_offset, struct mdss_debug_base **dbg_blk)
{
	struct mdss_data_type *mdata = mdss_res;
	struct mdss_debug_data *mdd;
	struct mdss_debug_base *dbg;
	struct dentry *ent_off, *ent_reg;
	char dn[80] = "";
	int prefix_len = 0;

	if (dbg_blk)
		(*dbg_blk) = NULL;

	if (!mdata || !mdata->debug_inf.debug_data)
		return -ENODEV;

	mdd = mdata->debug_inf.debug_data;

	dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
	if (!dbg)
		return -ENOMEM;

	if (name)
		strlcpy(dbg->name, name, sizeof(dbg->name));
	dbg->base = base;
	dbg->max_offset = max_offset;
	dbg->off = 0;
	dbg->cnt = DEFAULT_BASE_REG_CNT;
	dbg->reg_dump = NULL;

	if (name && strcmp(name, "mdp"))
		prefix_len = snprintf(dn, sizeof(dn), "%s_", name);

	strlcpy(dn + prefix_len, "off", sizeof(dn) - prefix_len);
	ent_off = debugfs_create_file(dn, 0644, mdd->root, dbg, &mdss_off_fops);
	if (IS_ERR_OR_NULL(ent_off)) {
		pr_err("debugfs_create_file: offset fail\n");
		goto off_fail;
	}

	strlcpy(dn + prefix_len, "reg", sizeof(dn) - prefix_len);
	ent_reg = debugfs_create_file(dn, 0644, mdd->root, dbg, &mdss_reg_fops);
	if (IS_ERR_OR_NULL(ent_reg)) {
		pr_err("debugfs_create_file: reg fail\n");
		goto reg_fail;
	}

	/* Initialize list to make sure check for null list will be valid */
	INIT_LIST_HEAD(&dbg->dump_list);

	list_add(&dbg->head, &mdd->base_list);

	if (dbg_blk)
		(*dbg_blk) = dbg;

	return 0;
reg_fail:
	debugfs_remove(ent_off);
off_fail:
	kfree(dbg);
	return -ENODEV;
}

static void parse_dump_range_name(struct device_node *node,
	int total_names, int index, char *range_name, u32 range_size,
	const char *name_prop)
{
	int rc = 0;
	const char *st = NULL;

	if ((total_names > 0) && (index < total_names)) {
		rc = of_property_read_string_index(node,
			name_prop, index, &st);
		if (rc) {
			pr_err("%s: error reading name. index=%d, rc=%d\n",
				__func__, index, rc);
			goto error;
		}
		snprintf(range_name, range_size, "%s", st);
		return;
	}

error:
	snprintf(range_name, range_size, "%s", "<no named range>");
}

static int parse_dt_xlog_dump_list(const u32 *arr, int count,
	struct list_head *xlog_dump_list, int total_names,
	struct platform_device *pdev, const char *name_prop)
{
	struct range_dump_node *xlog_node;
	u32 len;
	int i;

	for (i = 0, len = count * 2; i < len; i += 2) {
		xlog_node = kzalloc(sizeof(*xlog_node), GFP_KERNEL);
		if (!xlog_node)
			return -ENOMEM;

		xlog_node->offset.start = be32_to_cpu(arr[i]);
		xlog_node->offset.end = be32_to_cpu(arr[i + 1]);
		parse_dump_range_name(pdev->dev.of_node, total_names, i/2,
			xlog_node->range_name,
			ARRAY_SIZE(xlog_node->range_name), name_prop);

		list_add_tail(&xlog_node->head, xlog_dump_list);
	}

	return 0;
}

void mdss_debug_register_dump_range(struct platform_device *pdev,
	struct mdss_debug_base *blk_base, const char *ranges_prop,
	const char *name_prop)
{
	int total_dump_names, mdp_len;
	const u32 *mdp_arr;

	if (!blk_base || !ranges_prop || !name_prop)
		return;

	/* Get the property with the name of the ranges */
	total_dump_names = of_property_count_strings(pdev->dev.of_node,
		name_prop);
	if (total_dump_names < 0) {
		pr_warn("%s: dump names not found. rc=%d\n", __func__,
			total_dump_names);
		total_dump_names = 0;
	}

	mdp_arr = of_get_property(pdev->dev.of_node, ranges_prop,
			&mdp_len);
	if (!mdp_arr) {
		pr_warn("No xlog range dump found, continue\n");
		mdp_len = 0;
	} else {
		/* 2 is the number of entries per row to calculate the rows */
		mdp_len /= 2 * sizeof(u32);
		parse_dt_xlog_dump_list(mdp_arr, mdp_len,
			&blk_base->dump_list, total_dump_names, pdev,
				name_prop);
	}
}

static ssize_t mdss_debug_factor_write(struct file *file,
		    const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_fudge_factor *factor  = file->private_data;
	u32 numer;
	u32 denom;
	char buf[32];

	if (!factor)
		return -ENODEV;

	numer = factor->numer;
	denom = factor->denom;

	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	if (strnchr(buf, count, '/')) {
		/* Parsing buf as fraction */
		if (sscanf(buf, "%u/%u", &numer, &denom) != 2)
			return -EFAULT;
	} else {
		/* Parsing buf as percentage */
		if (kstrtouint(buf, 0, &numer))
			return -EFAULT;
		denom = 100;
	}

	if (numer && denom) {
		factor->numer = numer;
		factor->denom = denom;
	}

	pr_debug("numer=%d  denom=%d\n", numer, denom);

	return count;
}

static ssize_t mdss_debug_factor_read(struct file *file,
			char __user *buff, size_t count, loff_t *ppos)
{
	struct mdss_fudge_factor *factor = file->private_data;
	int len = 0;
	char buf[32] = {'\0'};

	if (!factor)
		return -ENODEV;

	if (*ppos)
		return 0;	/* the end */

	len = snprintf(buf, sizeof(buf), "%d/%d\n",
			factor->numer, factor->denom);
	if (len < 0 || len >= sizeof(buf))
		return 0;

	if ((count < sizeof(buf)) || copy_to_user(buff, buf, len))
		return -EFAULT;

	*ppos += len;	/* increase offset */

	return len;
}

static const struct file_operations mdss_factor_fops = {
	.open = simple_open,
	.read = mdss_debug_factor_read,
	.write = mdss_debug_factor_write,
};

static ssize_t mdss_debug_perf_mode_write(struct file *file,
		    const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_perf_tune *perf_tune = file->private_data;
	struct mdss_data_type *mdata = mdss_res;
	int perf_mode = 0;
	char buf[10];

	if (!perf_tune)
		return -EFAULT;

	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	if (sscanf(buf, "%d", &perf_mode) != 1)
		return -EFAULT;

	if (perf_mode) {
		/* run the driver with max clk and BW vote */
		mdata->perf_tune.min_mdp_clk = mdata->max_mdp_clk_rate;
		mdata->perf_tune.min_bus_vote = (u64)mdata->max_bw_high*1000;
	} else {
		/* reset the perf tune params to 0 */
		mdata->perf_tune.min_mdp_clk = 0;
		mdata->perf_tune.min_bus_vote = 0;
	}
	return count;
}

static ssize_t mdss_debug_perf_mode_read(struct file *file,
			char __user *buff, size_t count, loff_t *ppos)
{
	struct mdss_perf_tune *perf_tune = file->private_data;
	int len = 0;
	char buf[40] = {'\0'};

	if (!perf_tune)
		return -ENODEV;

	if (*ppos)
		return 0;	/* the end */

	len = snprintf(buf, sizeof(buf), "min_mdp_clk %lu min_bus_vote %llu\n",
	perf_tune->min_mdp_clk, perf_tune->min_bus_vote);
	if (len < 0 || len >= sizeof(buf))
		return 0;

	if ((count < sizeof(buf)) || copy_to_user(buff, buf, len))
		return -EFAULT;

	*ppos += len;   /* increase offset */

	return len;
}


static const struct file_operations mdss_perf_mode_fops = {
	.open = simple_open,
	.read = mdss_debug_perf_mode_read,
	.write = mdss_debug_perf_mode_write,
};

static ssize_t mdss_debug_perf_panic_read(struct file *file,
			char __user *buff, size_t count, loff_t *ppos)
{
	struct mdss_data_type *mdata = file->private_data;
	int len = 0;
	char buf[40] = {'\0'};

	if (!mdata)
		return -ENODEV;

	if (*ppos)
		return 0; /* the end */

	len = snprintf(buf, sizeof(buf), "%d\n",
		!mdata->has_panic_ctrl);
	if (len < 0 || len >= sizeof(buf))
		return 0;

	if ((count < sizeof(buf)) || copy_to_user(buff, buf, len))
		return -EFAULT;

	*ppos += len;   /* increase offset */

	return len;
}

static int mdss_debug_set_panic_signal(struct mdss_mdp_pipe *pipe_pool,
	u32 pool_size, struct mdss_data_type *mdata, bool enable)
{
	int i, cnt = 0;
	struct mdss_mdp_pipe *pipe;

	for (i = 0; i < pool_size; i++) {
		pipe = pipe_pool + i;
		if (pipe && (atomic_read(&pipe->kref.refcount) != 0) &&
			mdss_mdp_panic_signal_support_mode(mdata, pipe)) {
			mdss_mdp_pipe_panic_signal_ctrl(pipe, enable);
			pr_debug("pnum:%d count:%d img:%dx%d ",
				pipe->num, pipe->play_cnt, pipe->img_width,
				pipe->img_height);
			pr_cont("src[%d,%d,%d,%d] dst[%d,%d,%d,%d]\n",
				pipe->src.x, pipe->src.y, pipe->src.w,
				pipe->src.h, pipe->dst.x, pipe->dst.y,
				pipe->dst.w, pipe->dst.h);
			cnt++;
		} else if (pipe) {
			pr_debug("Inactive pipe num:%d supported:%d\n",
			       atomic_read(&pipe->kref.refcount),
			       mdss_mdp_panic_signal_support_mode(mdata, pipe));
		}
	}
	return cnt;
}

static void mdss_debug_set_panic_state(struct mdss_data_type *mdata,
	bool enable)
{
	pr_debug("VIG:\n");
	if (!mdss_debug_set_panic_signal(mdata->vig_pipes, mdata->nvig_pipes,
		mdata, enable))
		pr_debug("no active pipes found\n");
	pr_debug("RGB:\n");
	if (!mdss_debug_set_panic_signal(mdata->rgb_pipes, mdata->nrgb_pipes,
		mdata, enable))
		pr_debug("no active pipes found\n");
	pr_debug("DMA:\n");
	if (!mdss_debug_set_panic_signal(mdata->vig_pipes, mdata->ndma_pipes,
		mdata, enable))
		pr_debug("no active pipes found\n");
}

static ssize_t mdss_debug_perf_panic_write(struct file *file,
		    const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_data_type *mdata = file->private_data;
	int disable_panic;
	char buf[10];

	if (!mdata)
		return -EFAULT;

	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */

	if (sscanf(buf, "%d", &disable_panic) != 1)
		return -EFAULT;

	if (disable_panic) {
		/* Disable panic signal for all active pipes */
		pr_debug("Disabling panic:\n");
		mdss_debug_set_panic_state(mdata, false);
		mdata->has_panic_ctrl = false;
	} else {
		/* Enable panic signal for all active pipes */
		pr_debug("Enabling panic:\n");
		mdata->has_panic_ctrl = true;
		mdss_debug_set_panic_state(mdata, true);
	}

	return count;
}

static const struct file_operations mdss_perf_panic_enable = {
	.open = simple_open,
	.read = mdss_debug_perf_panic_read,
	.write = mdss_debug_perf_panic_write,
};

static int mdss_debugfs_cleanup(struct mdss_debug_data *mdd)
{
	struct mdss_debug_base *base, *tmp;

	if (!mdd)
		return 0;

	list_for_each_entry_safe(base, tmp, &mdd->base_list, head) {
		list_del(&base->head);
		kfree(base);
	}

	if (mdd->root)
		debugfs_remove_recursive(mdd->root);

	kfree(mdd);

	return 0;
}

static ssize_t mdss_debug_perf_bw_limit_read(struct file *file,
			char __user *buff, size_t count, loff_t *ppos)
{
	struct mdss_data_type *mdata = file->private_data;
	struct mdss_max_bw_settings *temp_settings;
	int len = 0, i;
	char buf[256];

	if (!mdata)
		return -ENODEV;

	if (*ppos)
		return 0;	/* the end */

	pr_debug("mdata->max_bw_settings_cnt = %d\n",
			mdata->max_bw_settings_cnt);

	temp_settings = mdata->max_bw_settings;
	for (i = 0; i < mdata->max_bw_settings_cnt; i++) {
		len += snprintf(buf + len, sizeof(buf), "%d %d\n",
				temp_settings->mdss_max_bw_mode,
					temp_settings->mdss_max_bw_val);
		temp_settings++;
	}

	if (len < 0 || len >= sizeof(buf))
		return 0;

	if ((count < sizeof(buf)) || copy_to_user(buff, buf, len))
		return -EFAULT;

	*ppos += len;	/* increase offset */

	return len;
}

static ssize_t mdss_debug_perf_bw_limit_write(struct file *file,
		    const char __user *user_buf, size_t count, loff_t *ppos)
{
	struct mdss_data_type *mdata = file->private_data;
	char buf[32];
	u32 mode = 0, val = 0, cnt;
	struct mdss_max_bw_settings *temp_settings;

	if (!mdata)
		return -ENODEV;


	if (count >= sizeof(buf))
		return -EFAULT;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[count] = 0;	/* end of string */
	cnt = mdata->max_bw_settings_cnt;
	temp_settings = mdata->max_bw_settings;

	if (strnchr(buf, count, ' ')) {
		/* Parsing buf */
		if (sscanf(buf, "%u %u", &mode, &val) != 2)
			return -EFAULT;
	}

	while (cnt--) {
		if (mode == temp_settings->mdss_max_bw_mode) {
			temp_settings->mdss_max_bw_val = val;
			break;
		} else {
			temp_settings++;
		}
	}

	if (cnt == 0)
		pr_err("Input mode is invalid\n");

	return count;
}

static const struct file_operations mdss_perf_bw_limit_fops = {
	.open = simple_open,
	.read = mdss_debug_perf_bw_limit_read,
	.write = mdss_debug_perf_bw_limit_write,
};

static int mdss_debugfs_perf_init(struct mdss_debug_data *mdd,
			struct mdss_data_type *mdata) {

	debugfs_create_u32("min_mdp_clk", 0644, mdd->perf,
		(u32 *)&mdata->perf_tune.min_mdp_clk);

	debugfs_create_u64("min_bus_vote", 0644, mdd->perf,
		(u64 *)&mdata->perf_tune.min_bus_vote);

	debugfs_create_u32("disable_prefill", 0644, mdd->perf,
		(u32 *)&mdata->disable_prefill);

	debugfs_create_file("disable_panic", 0644, mdd->perf,
		(struct mdss_data_type *)mdata, &mdss_perf_panic_enable);

	debugfs_create_bool("enable_bw_release", 0644, mdd->perf,
		(u32 *)&mdata->enable_bw_release);

	debugfs_create_bool("enable_rotator_bw_release", 0644, mdd->perf,
		(u32 *)&mdata->enable_rotator_bw_release);

	debugfs_create_file("ab_factor", 0644, mdd->perf,
		&mdata->ab_factor, &mdss_factor_fops);

	debugfs_create_file("ib_factor", 0644, mdd->perf,
		&mdata->ib_factor, &mdss_factor_fops);

	debugfs_create_file("ib_factor_overlap", 0644, mdd->perf,
		&mdata->ib_factor_overlap, &mdss_factor_fops);

	debugfs_create_file("ib_factor_cmd", 0644, mdd->perf,
		&mdata->ib_factor_cmd, &mdss_factor_fops);

	debugfs_create_file("clk_factor", 0644, mdd->perf,
		&mdata->clk_factor, &mdss_factor_fops);

	debugfs_create_u32("threshold_low", 0644, mdd->perf,
		(u32 *)&mdata->max_bw_low);

	debugfs_create_u32("threshold_high", 0644, mdd->perf,
		(u32 *)&mdata->max_bw_high);

	debugfs_create_u32("threshold_pipe", 0644, mdd->perf,
		(u32 *)&mdata->max_bw_per_pipe);

	debugfs_create_file("perf_mode", 0644, mdd->perf,
		(u32 *)&mdata->perf_tune, &mdss_perf_mode_fops);

	/* Initialize percentage to 0% */
	mdata->latency_buff_per = 0;
	debugfs_create_u32("latency_buff_per", 0644, mdd->perf,
		(u32 *)&mdata->latency_buff_per);

	debugfs_create_file("threshold_bw_limit", 0644, mdd->perf,
		(struct mdss_data_type *)mdata, &mdss_perf_bw_limit_fops);

	return 0;
}

int mdss_debugfs_init(struct mdss_data_type *mdata)
{
	struct mdss_debug_data *mdd;

	if (mdata->debug_inf.debug_data) {
		pr_warn("mdss debugfs already initialized\n");
		return -EBUSY;
	}

	mdd = kzalloc(sizeof(*mdd), GFP_KERNEL);
	if (!mdd) {
		pr_err("no memory to create mdss debug data\n");
		return -ENOMEM;
	}
	INIT_LIST_HEAD(&mdd->base_list);

	mdd->root = debugfs_create_dir("mdp", NULL);
	if (IS_ERR_OR_NULL(mdd->root)) {
		pr_err("debugfs_create_dir for mdp failed, error %ld\n",
		       PTR_ERR(mdd->root));
		goto err;
	}

	mdd->perf = debugfs_create_dir("perf", mdd->root);
	if (IS_ERR_OR_NULL(mdd->perf)) {
		pr_err("debugfs_create_dir perf fail, error %ld\n",
			PTR_ERR(mdd->perf));
		goto err;
	}

	debugfs_create_bool("allow_cx_vddmin", 0644, mdd->root,
		(u32 *)&mdata->allow_cx_vddmin);

	mdd->bordercolor = debugfs_create_dir("bordercolor", mdd->root);
	if (IS_ERR_OR_NULL(mdd->root)) {
		pr_err("debugfs_create_dir for mdp failed, error %ld\n",
		       PTR_ERR(mdd->root));
		goto err;
	}

	mdss_debugfs_perf_init(mdd, mdata);

	if (mdss_create_xlog_debug(mdd))
		goto err;

	mdata->debug_inf.debug_data = mdd;

	return 0;

err:
	mdss_debugfs_cleanup(mdd);
	return -ENODEV;
}

int mdss_debugfs_remove(struct mdss_data_type *mdata)
{
	struct mdss_debug_data *mdd = mdata->debug_inf.debug_data;

	mdss_debugfs_cleanup(mdd);
	mdata->debug_inf.debug_data = NULL;

	return 0;
}

int vsync_count;
static struct mdss_mdp_misr_map {
	u32 ctrl_reg;
	u32 value_reg;
	u32 crc_op_mode;
	u32 crc_index;
	bool use_ping;
	bool is_ping_full;
	bool is_pong_full;
	struct mutex crc_lock;
	u32 crc_ping[MISR_CRC_BATCH_SIZE];
	u32 crc_pong[MISR_CRC_BATCH_SIZE];
} mdss_mdp_misr_table[DISPLAY_MISR_MAX] = {
	[DISPLAY_MISR_DSI0] = {
		.ctrl_reg = MDSS_MDP_LP_MISR_CTRL_DSI0,
		.value_reg = MDSS_MDP_LP_MISR_SIGN_DSI0,
		.crc_op_mode = 0,
		.crc_index = 0,
		.use_ping = true,
		.is_ping_full = false,
		.is_pong_full = false,
	},
	[DISPLAY_MISR_DSI1] = {
		.ctrl_reg = MDSS_MDP_LP_MISR_CTRL_DSI1,
		.value_reg = MDSS_MDP_LP_MISR_SIGN_DSI1,
		.crc_op_mode = 0,
		.crc_index = 0,
		.use_ping = true,
		.is_ping_full = false,
		.is_pong_full = false,
	},
	[DISPLAY_MISR_EDP] = {
		.ctrl_reg = MDSS_MDP_LP_MISR_CTRL_EDP,
		.value_reg = MDSS_MDP_LP_MISR_SIGN_EDP,
		.crc_op_mode = 0,
		.crc_index = 0,
		.use_ping = true,
		.is_ping_full = false,
		.is_pong_full = false,
	},
	[DISPLAY_MISR_HDMI] = {
		.ctrl_reg = MDSS_MDP_LP_MISR_CTRL_HDMI,
		.value_reg = MDSS_MDP_LP_MISR_SIGN_HDMI,
		.crc_op_mode = 0,
		.crc_index = 0,
		.use_ping = true,
		.is_ping_full = false,
		.is_pong_full = false,
	},
	[DISPLAY_MISR_MDP] = {
		.ctrl_reg = MDSS_MDP_LP_MISR_CTRL_MDP,
		.value_reg = MDSS_MDP_LP_MISR_SIGN_MDP,
		.crc_op_mode = 0,
		.crc_index = 0,
		.use_ping = true,
		.is_ping_full = false,
		.is_pong_full = false,
	},
};

static inline struct mdss_mdp_misr_map *mdss_misr_get_map(u32 block_id,
		struct mdss_mdp_ctl *ctl, struct mdss_data_type *mdata)
{
	struct mdss_mdp_misr_map *map;
	struct mdss_mdp_mixer *mixer;
	char *ctrl_reg = NULL, *value_reg = NULL;
	char *intf_base = NULL;

	if (block_id > DISPLAY_MISR_HDMI && block_id != DISPLAY_MISR_MDP) {
		pr_err("MISR Block id (%d) out of range\n", block_id);
		return NULL;
	}

	if (mdata->mdp_rev >= MDSS_MDP_HW_REV_105) {
		/* Use updated MDP Interface MISR Block address offset */
		if (block_id == DISPLAY_MISR_MDP) {
			if (ctl) {
				mixer = mdss_mdp_mixer_get(ctl,
					MDSS_MDP_MIXER_MUX_DEFAULT);
				ctrl_reg = mixer->base +
					MDSS_MDP_LAYER_MIXER_MISR_CTRL;
				value_reg = mixer->base +
					MDSS_MDP_LAYER_MIXER_MISR_SIGNATURE;
			}
		} else {
			if (block_id <= DISPLAY_MISR_HDMI) {
				intf_base = (char *)mdss_mdp_get_intf_base_addr(
						mdata, block_id);

				if ((block_id == DISPLAY_MISR_DSI0 ||
				     block_id == DISPLAY_MISR_DSI1) &&
				     (ctl && !ctl->is_video_mode)) {
					ctrl_reg = intf_base +
						MDSS_MDP_INTF_CMD_MISR_CTRL;
					value_reg = intf_base +
					    MDSS_MDP_INTF_CMD_MISR_SIGNATURE;
				} else {
					ctrl_reg = intf_base +
						MDSS_MDP_INTF_MISR_CTRL;
					value_reg = intf_base +
						MDSS_MDP_INTF_MISR_SIGNATURE;
				}
			}
			/*
			 * For msm8916/8939/8952, additional offset of 0x10
			 * is required
			 */
			if ((mdata->mdp_rev == MDSS_MDP_HW_REV_106) ||
				(mdata->mdp_rev == MDSS_MDP_HW_REV_108) ||
				(mdata->mdp_rev == MDSS_MDP_HW_REV_112)) {
				ctrl_reg += 0x10;
				value_reg += 0x10;
			}
		}
		mdss_mdp_misr_table[block_id].ctrl_reg = (u32)(ctrl_reg -
							mdata->mdp_base);
		mdss_mdp_misr_table[block_id].value_reg = (u32)(value_reg -
							mdata->mdp_base);
	}

	map = mdss_mdp_misr_table + block_id;
	if ((map->ctrl_reg == 0) || (map->value_reg == 0)) {
		pr_err("MISR Block id (%d) config not found\n", block_id);
		return NULL;
	}

	pr_debug("MISR Module(%d) CTRL(0x%x) SIG(0x%x) intf_base(0x%pK)\n",
			block_id, map->ctrl_reg, map->value_reg, intf_base);
	return map;
}

/*
 * switch_mdp_misr_offset() - Update MDP MISR register offset for MDSS
 * Hardware Revision 103.
 * @map: mdss_mdp_misr_map
 * @mdp_rev: MDSS Hardware Revision
 * @block_id: Logical MISR Block ID
 *
 * Return: true when MDSS Revision is 103 else false.
 */
static bool switch_mdp_misr_offset(struct mdss_mdp_misr_map *map, u32 mdp_rev,
					u32 block_id)
{
	bool use_mdp_up_misr = false;

	if ((IS_MDSS_MAJOR_MINOR_SAME(mdp_rev, MDSS_MDP_HW_REV_103)) &&
		(block_id == DISPLAY_MISR_MDP)) {
		/* Use Upper pipe MISR for Layer Mixer CRC */
		map->ctrl_reg = MDSS_MDP_UP_MISR_CTRL_MDP;
		map->value_reg = MDSS_MDP_UP_MISR_SIGN_MDP;
		use_mdp_up_misr = true;
	}
	pr_debug("MISR Module(%d) Offset of MISR_CTRL = 0x%x MISR_SIG = 0x%x\n",
			block_id, map->ctrl_reg, map->value_reg);
	return use_mdp_up_misr;
}

int mdss_misr_set(struct mdss_data_type *mdata,
			struct mdp_misr *req,
			struct mdss_mdp_ctl *ctl)
{
	struct mdss_mdp_misr_map *map;
	struct mdss_mdp_mixer *mixer;
	u32 config = 0, val = 0;
	u32 mixer_num = 0;
	bool is_valid_wb_mixer = true;
	bool use_mdp_up_misr = false;

	if (!mdata || !req || !ctl) {
		pr_err("Invalid input params: mdata = %pK req = %pK ctl = %pK",
			mdata, req, ctl);
		return -EINVAL;
	}

	map = mdss_misr_get_map(req->block_id, ctl, mdata);

	if (!map) {
		pr_err("Invalid MISR Block=%d\n", req->block_id);
		return -EINVAL;
	}
	use_mdp_up_misr = switch_mdp_misr_offset(map, mdata->mdp_rev,
				req->block_id);

	mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_ON);
	if (req->block_id == DISPLAY_MISR_MDP) {
		mixer = mdss_mdp_mixer_get(ctl, MDSS_MDP_MIXER_MUX_DEFAULT);
		if (!mixer) {
			pr_err("%s: failed to get default mixer, Block=%d\n",
				__func__, req->block_id);
			return -EINVAL;
		}
		mixer_num = mixer->num;
		pr_debug("SET MDP MISR BLK to MDSS_MDP_LP_MISR_SEL_LMIX%d_GC\n",
			mixer_num);
		switch (mixer_num) {
		case MDSS_MDP_INTF_LAYERMIXER0:
			pr_debug("Use Layer Mixer 0 for WB CRC\n");
			val = MDSS_MDP_LP_MISR_SEL_LMIX0_GC;
			break;
		case MDSS_MDP_INTF_LAYERMIXER1:
			pr_debug("Use Layer Mixer 1 for WB CRC\n");
			val = MDSS_MDP_LP_MISR_SEL_LMIX1_GC;
			break;
		case MDSS_MDP_INTF_LAYERMIXER2:
			pr_debug("Use Layer Mixer 2 for WB CRC\n");
			val = MDSS_MDP_LP_MISR_SEL_LMIX2_GC;
			break;
		default:
			pr_err("Invalid Layer Mixer %d selected for WB CRC\n",
				mixer_num);
			is_valid_wb_mixer = false;
			break;
		}
		if ((is_valid_wb_mixer) &&
			(mdata->mdp_rev < MDSS_MDP_HW_REV_106)) {
			if (use_mdp_up_misr)
				writel_relaxed((val +
					MDSS_MDP_UP_MISR_LMIX_SEL_OFFSET),
					(mdata->mdp_base +
					 MDSS_MDP_UP_MISR_SEL));
			else
				writel_relaxed(val,
					(mdata->mdp_base +
					MDSS_MDP_LP_MISR_SEL));
		}
	}
	vsync_count = 0;
	map->crc_op_mode = req->crc_op_mode;
	config = (MDSS_MDP_MISR_CTRL_FRAME_COUNT_MASK & req->frame_count) |
			(MDSS_MDP_MISR_CTRL_ENABLE);

	writel_relaxed(MDSS_MDP_MISR_CTRL_STATUS_CLEAR,
			mdata->mdp_base + map->ctrl_reg);
	/* ensure clear is done */
	wmb();

	memset(map->crc_ping, 0, sizeof(map->crc_ping));
	memset(map->crc_pong, 0, sizeof(map->crc_pong));
	map->crc_index = 0;
	map->use_ping = true;
	map->is_ping_full = false;
	map->is_pong_full = false;

	if (MISR_OP_BM != map->crc_op_mode) {

		writel_relaxed(config,
				mdata->mdp_base + map->ctrl_reg);
		pr_debug("MISR_CTRL = 0x%x",
				readl_relaxed(mdata->mdp_base + map->ctrl_reg));
	}
	mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_OFF);
	return 0;
}

char *get_misr_block_name(int misr_block_id)
{
	switch (misr_block_id) {
	case DISPLAY_MISR_EDP: return "eDP";
	case DISPLAY_MISR_DSI0: return "DSI_0";
	case DISPLAY_MISR_DSI1: return "DSI_1";
	case DISPLAY_MISR_HDMI: return "HDMI";
	case DISPLAY_MISR_MDP: return "Writeback";
	case DISPLAY_MISR_DSI_CMD: return "DSI_CMD";
	default: return "???";
	}
}

int mdss_misr_get(struct mdss_data_type *mdata,
			struct mdp_misr *resp,
			struct mdss_mdp_ctl *ctl)
{
	struct mdss_mdp_misr_map *map;
	struct mdss_mdp_mixer *mixer;
	u32 status;
	int ret = -1;
	int i;

	map = mdss_misr_get_map(resp->block_id, ctl, mdata);
	if (!map) {
		pr_err("Invalid MISR Block=%d\n", resp->block_id);
		return -EINVAL;
	}
	switch_mdp_misr_offset(map, mdata->mdp_rev, resp->block_id);

	mixer = mdss_mdp_mixer_get(ctl, MDSS_MDP_MIXER_MUX_DEFAULT);

	mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_ON);
	switch (map->crc_op_mode) {
	case MISR_OP_SFM:
	case MISR_OP_MFM:
		ret = readl_poll_timeout(mdata->mdp_base + map->ctrl_reg,
				status, status & MDSS_MDP_MISR_CTRL_STATUS,
				MISR_POLL_SLEEP, MISR_POLL_TIMEOUT);
		if (ret == 0) {
			resp->crc_value[0] = readl_relaxed(mdata->mdp_base +
				map->value_reg);
			pr_debug("CRC %s=0x%x\n",
				get_misr_block_name(resp->block_id),
				resp->crc_value[0]);
			writel_relaxed(0, mdata->mdp_base + map->ctrl_reg);
		} else {
			pr_debug("Get MISR TimeOut %s\n",
				get_misr_block_name(resp->block_id));

			ret = readl_poll_timeout(mdata->mdp_base +
					map->ctrl_reg, status,
					status & MDSS_MDP_MISR_CTRL_STATUS,
					MISR_POLL_SLEEP, MISR_POLL_TIMEOUT);
			if (ret == 0) {
				resp->crc_value[0] =
					readl_relaxed(mdata->mdp_base +
					map->value_reg);
				pr_debug("Retry CRC %s=0x%x\n",
					get_misr_block_name(resp->block_id),
					resp->crc_value[0]);
			} else {
				pr_err("Get MISR TimeOut %s\n",
					get_misr_block_name(resp->block_id));
			}
			writel_relaxed(0, mdata->mdp_base + map->ctrl_reg);
		}
		break;
	case MISR_OP_BM:
		if (map->is_ping_full) {
			for (i = 0; i < MISR_CRC_BATCH_SIZE; i++)
				resp->crc_value[i] = map->crc_ping[i];
			memset(map->crc_ping, 0, sizeof(map->crc_ping));
			map->is_ping_full = false;
			ret = 0;
		} else if (map->is_pong_full) {
			for (i = 0; i < MISR_CRC_BATCH_SIZE; i++)
				resp->crc_value[i] = map->crc_pong[i];
			memset(map->crc_pong, 0, sizeof(map->crc_pong));
			map->is_pong_full = false;
			ret = 0;
		} else {
			pr_debug("mdss_mdp_misr_crc_get PING BUF %s\n",
				map->is_ping_full ? "FULL" : "EMPTRY");
			pr_debug("mdss_mdp_misr_crc_get PONG BUF %s\n",
				map->is_pong_full ? "FULL" : "EMPTRY");
		}
		resp->crc_op_mode = map->crc_op_mode;
		break;
	default:
		ret = -ENOSYS;
		break;
	}

	mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_OFF);
	return ret;
}

/* This function is expected to be called from interrupt context */
void mdss_misr_crc_collect(struct mdss_data_type *mdata, int block_id)
{
	struct mdss_mdp_misr_map *map;
	u32 status = 0;
	u32 crc = 0x0BAD0BAD;
	bool crc_stored = false;

	map = mdss_misr_get_map(block_id, NULL, mdata);
	if (!map || (map->crc_op_mode != MISR_OP_BM))
		return;
	switch_mdp_misr_offset(map, mdata->mdp_rev, block_id);

	status = readl_relaxed(mdata->mdp_base + map->ctrl_reg);
	if (MDSS_MDP_MISR_CTRL_STATUS & status) {
		crc = readl_relaxed(mdata->mdp_base + map->value_reg);
		if (map->use_ping) {
			if (map->is_ping_full) {
				pr_err("PING Buffer FULL\n");
			} else {
				map->crc_ping[map->crc_index] = crc;
				crc_stored = true;
			}
		} else {
			if (map->is_pong_full) {
				pr_err("PONG Buffer FULL\n");
			} else {
				map->crc_pong[map->crc_index] = crc;
				crc_stored = true;
			}
		}

		if (crc_stored) {
			map->crc_index = (map->crc_index + 1);
			if (map->crc_index == MISR_CRC_BATCH_SIZE) {
				map->crc_index = 0;
				if (true == map->use_ping) {
					map->is_ping_full = true;
					map->use_ping = false;
				} else {
					map->is_pong_full = true;
					map->use_ping = true;
				}
				pr_debug("USE BUFF %s\n", map->use_ping ?
					"PING" : "PONG");
				pr_debug("mdss_misr_crc_collect PING BUF %s\n",
					map->is_ping_full ? "FULL" : "EMPTRY");
				pr_debug("mdss_misr_crc_collect PONG BUF %s\n",
					map->is_pong_full ? "FULL" : "EMPTRY");
			}
		} else {
			pr_err("CRC(%d) Not saved\n", crc);
		}

		if (mdata->mdp_rev < MDSS_MDP_HW_REV_105) {
			writel_relaxed(MDSS_MDP_MISR_CTRL_STATUS_CLEAR,
					mdata->mdp_base + map->ctrl_reg);
			writel_relaxed(MISR_CRC_BATCH_CFG,
				mdata->mdp_base + map->ctrl_reg);
		}
	} else if (0 == status) {
		if (mdata->mdp_rev < MDSS_MDP_HW_REV_105)
			writel_relaxed(MISR_CRC_BATCH_CFG,
					mdata->mdp_base + map->ctrl_reg);
		else
			writel_relaxed(MISR_CRC_BATCH_CFG |
					MDSS_MDP_LP_MISR_CTRL_FREE_RUN_MASK,
					mdata->mdp_base + map->ctrl_reg);
		pr_debug("$$ Batch CRC Start $$\n");
	}
	pr_debug("$$ Vsync Count = %d, CRC=0x%x Indx = %d$$\n",
		vsync_count, crc, map->crc_index);

	if (MAX_VSYNC_COUNT == vsync_count) {
		pr_err("RESET vsync_count(%d)\n", vsync_count);
		vsync_count = 0;
	} else {
		vsync_count += 1;
	}
}