drivers/amlogic/media/vout/vout_serve/vout_serve.c

/*
 * drivers/amlogic/media/vout/vout_serve/vout_serve.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.
 *
 */

/* Linux Headers */
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/ctype.h>
#include <linux/of.h>
#include <linux/major.h>
#include <linux/uaccess.h>
#include <linux/extcon.h>
#include <linux/cdev.h>

/* Amlogic Headers */
#include <linux/amlogic/media/vout/vout_notify.h>

/* Local Headers */
#include "vout_func.h"

#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND
#include <linux/amlogic/pm.h>
static struct early_suspend early_suspend;
static int early_suspend_flag;
#endif
#ifdef CONFIG_SCREEN_ON_EARLY
static int early_resume_flag;
#endif

#define VOUT_CDEV_NAME  "display"
#define VOUT_CLASS_NAME "display"
#define MAX_NUMBER_PARA 10

#define VMODE_NAME_LEN_MAX    64
static struct class *vout_class;
static DEFINE_MUTEX(vout_serve_mutex);
static char vout_mode_uboot[VMODE_NAME_LEN_MAX] __nosavedata;
static char vout_mode[VMODE_NAME_LEN_MAX] __nosavedata;
static char local_name[VMODE_NAME_LEN_MAX] = {0};
static u32 vout_init_vmode = VMODE_INIT_NULL;
static int uboot_display;
static unsigned int bist_mode;

static char vout_axis[64] __nosavedata;

static char hdmimode[VMODE_NAME_LEN_MAX] = {
	'i', 'n', 'v', 'a', 'l', 'i', 'd', '\0'
};
static char cvbsmode[VMODE_NAME_LEN_MAX] = {
	'i', 'n', 'v', 'a', 'l', 'i', 'd', '\0'
};
static enum vmode_e last_vmode = VMODE_MAX;
static int tvout_monitor_flag = 1;
static unsigned int tvout_monitor_timeout_cnt = 20;

static struct delayed_work tvout_mode_work;

static struct extcon_dev *vout_excton_setmode;
static const unsigned int vout_cable[] = {
	EXTCON_TYPE_DISP,
	EXTCON_NONE,
};

static struct vout_cdev_s *vout_cdev;

/* **********************************************************
 * null display support
 * **********************************************************
 */
static int nulldisp_index = VMODE_NULL_DISP_MAX;
static struct vinfo_s nulldisp_vinfo[] = {
	{
		.name              = "null",
		.mode              = VMODE_NULL,
		.width             = 1920,
		.height            = 1080,
		.field_height      = 1080,
		.aspect_ratio_num  = 16,
		.aspect_ratio_den  = 9,
		.sync_duration_num = 60,
		.sync_duration_den = 1,
		.video_clk         = 148500000,
		.htotal            = 2200,
		.vtotal            = 1125,
		.fr_adj_type       = VOUT_FR_ADJ_NONE,
		.viu_color_fmt     = COLOR_FMT_RGB444,
		.viu_mux           = VIU_MUX_MAX,
		.vout_device       = NULL,
	},
	{
		.name              = "invalid",
		.mode              = VMODE_INVALID,
		.width             = 1920,
		.height            = 1080,
		.field_height      = 1080,
		.aspect_ratio_num  = 16,
		.aspect_ratio_den  = 9,
		.sync_duration_num = 60,
		.sync_duration_den = 1,
		.video_clk         = 148500000,
		.htotal            = 2200,
		.vtotal            = 1125,
		.fr_adj_type       = VOUT_FR_ADJ_NONE,
		.viu_color_fmt     = COLOR_FMT_RGB444,
		.viu_mux           = VIU_MUX_MAX,
		.vout_device       = NULL,
	},
	{
		.name              = "dummy_panel",
		.mode              = VMODE_DUMMY_LCD,
		.width             = 1920,
		.height            = 1080,
		.field_height      = 1080,
		.aspect_ratio_num  = 16,
		.aspect_ratio_den  = 9,
		.sync_duration_num = 60,
		.sync_duration_den = 1,
		.video_clk         = 148500000,
		.htotal            = 2200,
		.vtotal            = 1125,
		.fr_adj_type       = VOUT_FR_ADJ_NONE,
		.viu_color_fmt     = COLOR_FMT_RGB444,
		.viu_mux           = VIU_MUX_MAX,
		.vout_device       = NULL,
	},
};

static struct vinfo_s *nulldisp_get_current_info(void)
{
	if (nulldisp_index >= ARRAY_SIZE(nulldisp_vinfo))
		return NULL;

	return &nulldisp_vinfo[nulldisp_index];
}

static int nulldisp_set_current_vmode(enum vmode_e mode)
{
	return 0;
}

static enum vmode_e nulldisp_validate_vmode(char *name)
{
	enum vmode_e vmode = VMODE_MAX;
	int i;

	for (i = 0; i < ARRAY_SIZE(nulldisp_vinfo); i++) {
		if (strcmp(nulldisp_vinfo[i].name, name) == 0) {
			vmode = nulldisp_vinfo[i].mode;
			nulldisp_index = i;
			break;
		}
	}

	return vmode;
}

static int nulldisp_vmode_is_supported(enum vmode_e mode)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(nulldisp_vinfo); i++) {
		if (nulldisp_vinfo[i].mode == (mode & VMODE_MODE_BIT_MASK))
			return true;
	}
	return false;
}

static int nulldisp_disable(enum vmode_e cur_vmod)
{
	return 0;
}

static int nulldisp_vout_state;
static int nulldisp_vout_set_state(int bit)
{
	nulldisp_vout_state |= (1 << bit);
	return 0;
}

static int nulldisp_vout_clr_state(int bit)
{
	nulldisp_vout_state &= ~(1 << bit);
	return 0;
}

static int nulldisp_vout_get_state(void)
{
	return nulldisp_vout_state;
}

static struct vout_server_s nulldisp_vout_server = {
	.name = "nulldisp_vout_server",
	.op = {
		.get_vinfo          = nulldisp_get_current_info,
		.set_vmode          = nulldisp_set_current_vmode,
		.validate_vmode     = nulldisp_validate_vmode,
		.vmode_is_supported = nulldisp_vmode_is_supported,
		.disable            = nulldisp_disable,
		.set_state          = nulldisp_vout_set_state,
		.clr_state          = nulldisp_vout_clr_state,
		.get_state          = nulldisp_vout_get_state,
		.set_bist           = NULL,
	},
};

/* ********************************************************** */

char *get_vout_mode_internal(void)
{
	return vout_mode;
}
EXPORT_SYMBOL(get_vout_mode_internal);

char *get_vout_mode_uboot(void)
{
	return vout_mode_uboot;
}
EXPORT_SYMBOL(get_vout_mode_uboot);

int set_vout_mode(char *name)
{
	enum vmode_e mode;
	int ret = 0;

	vout_trim_string(name);
	VOUTPR("vmode set to %s\n", name);

	if (strcmp(name, local_name) == 0) {
		VOUTPR("don't set the same mode as current, exit\n");
		return -1;
	}

	mode = validate_vmode(name);
	if (mode == VMODE_MAX) {
		VOUTERR("no matched vout mode, exit\n");
		return -1;
	}
	memset(local_name, 0, sizeof(local_name));
	snprintf(local_name, VMODE_NAME_LEN_MAX, "%s", name);

	extcon_set_state_sync(vout_excton_setmode, EXTCON_TYPE_DISP, 1);

	vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE_PRE, &mode);
	ret = set_current_vmode(mode);
	if (ret)
		VOUTERR("new mode %s set error\n", name);
	else {
		snprintf(vout_mode, VMODE_NAME_LEN_MAX, "%s", name);
		VOUTPR("new mode %s set ok\n", vout_mode);
	}
	vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE, &mode);

	extcon_set_state_sync(vout_excton_setmode, EXTCON_TYPE_DISP, 0);

	return ret;
}

static int set_vout_init_mode(void)
{
	enum vmode_e vmode;
	char init_mode_str[VMODE_NAME_LEN_MAX];
	int ret = 0;

	snprintf(init_mode_str, VMODE_NAME_LEN_MAX, "%s", vout_mode_uboot);
	vout_init_vmode = validate_vmode(vout_mode_uboot);
	if (vout_init_vmode >= VMODE_MAX) {
		VOUTERR("no matched vout_init mode %s, force to invalid\n",
			vout_mode_uboot);
		nulldisp_index = 1;
		vout_init_vmode = nulldisp_vinfo[nulldisp_index].mode;
		snprintf(init_mode_str, VMODE_NAME_LEN_MAX, "%s",
			nulldisp_vinfo[nulldisp_index].name);
	}
	last_vmode = vout_init_vmode;

	if (uboot_display)
		vmode = vout_init_vmode | VMODE_INIT_BIT_MASK;
	else
		vmode = vout_init_vmode;

	memset(local_name, 0, sizeof(local_name));
	snprintf(local_name, VMODE_NAME_LEN_MAX, "%s", init_mode_str);
	ret = set_current_vmode(vmode);
	if (ret)
		VOUTERR("init mode %s set error\n", init_mode_str);
	else {
		snprintf(vout_mode, VMODE_NAME_LEN_MAX, "%s", init_mode_str);
		VOUTPR("init mode %s set ok\n", vout_mode);
	}

	return ret;
}

static int parse_para(const char *para, int para_num, int *result)
{
	char *token = NULL;
	char *params, *params_base;
	int *out = result;
	int len = 0, count = 0;
	int res = 0;
	int ret = 0;

	if (!para)
		return 0;

	params = kstrdup(para, GFP_KERNEL);
	params_base = params;
	token = params;
	len = strlen(token);
	do {
		token = strsep(&params, " ");
		while (token && (isspace(*token)
				|| !isgraph(*token)) && len) {
			token++;
			len--;
		}
		if ((!token) || (*token == '\n') || (len == 0))
			break;
		ret = kstrtoint(token, 0, &res);
		if (ret < 0)
			break;
		len = strlen(token);
		*out++ = res;
		count++;
	} while ((token) && (count < para_num) && (len > 0));

	kfree(params_base);
	return count;
}

#define OSD_COUNT 2
static void set_vout_axis(char *para)
{
	static struct disp_rect_s disp_rect[OSD_COUNT];
	/* char count = OSD_COUNT * 4; */
	int *pt;
	int parsed[MAX_NUMBER_PARA] = {};

	/* parse window para */
	if (parse_para(para, 8, parsed) >= 4) {
		pt = &disp_rect[0].x;
		memcpy(pt, &parsed[0], sizeof(struct disp_rect_s));
		pt = &disp_rect[1].x;
		memcpy(pt, &parsed[4], sizeof(struct disp_rect_s));
	}
	/* if ((count >= 4) && (count < 8))
	 *	disp_rect[1] = disp_rect[0];
	 */

	VOUTPR("osd0=> x:%d,y:%d,w:%d,h:%d\n"
		"osd1=> x:%d,y:%d,w:%d,h:%d\n",
			disp_rect[0].x, disp_rect[0].y,
			disp_rect[0].w, disp_rect[0].h,
			disp_rect[1].x, disp_rect[1].y,
			disp_rect[1].w, disp_rect[1].h);
	vout_notifier_call_chain(VOUT_EVENT_OSD_DISP_AXIS, &disp_rect[0]);
}

static ssize_t vout_mode_show(struct class *class,
		struct class_attribute *attr, char *buf)
{
	int ret = 0;

	ret = snprintf(buf, VMODE_NAME_LEN_MAX, "%s\n", vout_mode);

	return ret;
}

static ssize_t vout_mode_store(struct class *class,
		struct class_attribute *attr, const char *buf, size_t count)
{
	char mode[VMODE_NAME_LEN_MAX];

	mutex_lock(&vout_serve_mutex);
	tvout_monitor_flag = 0;
	snprintf(mode, VMODE_NAME_LEN_MAX, "%s", buf);
	set_vout_mode(mode);
	mutex_unlock(&vout_serve_mutex);
	return count;
}

static ssize_t vout_dummy_store(struct class *class,
		struct class_attribute *attr, const char *buf, size_t count)
{
	unsigned int tmp[4], sync_duration;
	enum vmode_e mode;
	int ret;

	mutex_lock(&vout_serve_mutex);
	mode = VMODE_DUMMY_LCD;
	ret = sscanf(buf, "%d %d %d %d", &tmp[0], &tmp[1], &tmp[2], &tmp[3]);
	if (ret == 2) {
		vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE_PRE, &mode);
		nulldisp_vinfo[2].width = tmp[0];
		nulldisp_vinfo[2].height = tmp[1];
		nulldisp_vinfo[2].field_height = tmp[1];
		VOUTPR("set dummy size: %d x %d\n", tmp[0], tmp[1]);
		vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE, &mode);
	} else if (ret == 4) {
		vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE_PRE, &mode);
		nulldisp_vinfo[2].width = tmp[0];
		nulldisp_vinfo[2].height = tmp[1];
		nulldisp_vinfo[2].field_height = tmp[1];
		nulldisp_vinfo[2].sync_duration_num = tmp[2];
		nulldisp_vinfo[2].sync_duration_den = tmp[3];
		sync_duration = (tmp[2] * 100) / tmp[3];
		VOUTPR("set dummy size: %d x %d, frame_rate: %d.%02dHz\n",
			tmp[0], tmp[1],
			(sync_duration / 100), (sync_duration % 100));
		vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE, &mode);
	} else {
		VOUTERR("invalid data\n");
	}
	mutex_unlock(&vout_serve_mutex);

	return count;
}

static ssize_t vout_axis_show(struct class *class,
		struct class_attribute *attr, char *buf)
{
	int ret = 0;

	ret = snprintf(buf, 64, "%s\n", vout_axis);
	return ret;
}

static ssize_t vout_axis_store(struct class *class,
		struct class_attribute *attr, const char *buf, size_t count)
{
	mutex_lock(&vout_serve_mutex);
	snprintf(vout_axis, 64, "%s", buf);
	set_vout_axis(vout_axis);
	mutex_unlock(&vout_serve_mutex);
	return count;
}

static ssize_t vout_fr_policy_show(struct class *class,
		struct class_attribute *attr, char *buf)
{
	int policy;
	int ret = 0;

	policy = get_vframe_rate_policy();
	ret = sprintf(buf, "%d\n", policy);

	return ret;
}

static ssize_t vout_fr_policy_store(struct class *class,
		struct class_attribute *attr, const char *buf, size_t count)
{
	int policy;
	int ret = 0;

	mutex_lock(&vout_serve_mutex);
	ret = kstrtoint(buf, 10, &policy);
	if (ret) {
		pr_info("%s: invalid data\n", __func__);
		mutex_unlock(&vout_serve_mutex);
		return -EINVAL;
	}
	ret = set_vframe_rate_policy(policy);
	if (ret)
		pr_info("%s: %d failed\n", __func__, policy);
	mutex_unlock(&vout_serve_mutex);

	return count;
}

static ssize_t vout_bist_show(struct class *class,
		struct class_attribute *attr, char *buf)
{
	int ret = 0;

	ret = sprintf(buf, "%d\n", bist_mode);

	return ret;
}

static ssize_t vout_bist_store(struct class *class,
		struct class_attribute *attr, const char *buf, size_t count)
{
	int ret = 0;

	mutex_lock(&vout_serve_mutex);

	ret = kstrtouint(buf, 10, &bist_mode);
	if (ret) {
		pr_info("%s: invalid data\n", __func__);
		mutex_unlock(&vout_serve_mutex);
		return -EINVAL;
	}
	set_vout_bist(bist_mode);

	mutex_unlock(&vout_serve_mutex);

	return count;
}

static ssize_t vout_vinfo_show(struct class *class,
		struct class_attribute *attr, char *buf)
{
	const struct vinfo_s *info = NULL;
	ssize_t len = 0;
	unsigned int i, j;

	info = get_current_vinfo();
	if (info == NULL)
		return sprintf(buf, "current vinfo is null\n");

	len = sprintf(buf, "current vinfo:\n"
		"    name:                  %s\n"
		"    mode:                  %d\n"
		"    width:                 %d\n"
		"    height:                %d\n"
		"    field_height:          %d\n"
		"    aspect_ratio_num:      %d\n"
		"    aspect_ratio_den:      %d\n"
		"    sync_duration_num:     %d\n"
		"    sync_duration_den:     %d\n"
		"    screen_real_width:     %d\n"
		"    screen_real_height:    %d\n"
		"    htotal:                %d\n"
		"    vtotal:                %d\n"
		"    fr_adj_type:           %d\n"
		"    video_clk:             %d\n"
		"    viu_color_fmt:         %d\n"
		"    viu_mux:               %d\n"
		"    3d_info:               %d\n\n",
		info->name, info->mode,
		info->width, info->height, info->field_height,
		info->aspect_ratio_num, info->aspect_ratio_den,
		info->sync_duration_num, info->sync_duration_den,
		info->screen_real_width, info->screen_real_height,
		info->htotal, info->vtotal, info->fr_adj_type,
		info->video_clk, info->viu_color_fmt, info->viu_mux,
		info->info_3d);
	len += sprintf(buf+len, "master_display_info:\n"
		"    present_flag          %d\n"
		"    features              0x%x\n"
		"    primaries             0x%x, 0x%x\n"
		"                          0x%x, 0x%x\n"
		"                          0x%x, 0x%x\n"
		"    white_point           0x%x, 0x%x\n"
		"    luminance             %d, %d\n\n",
		info->master_display_info.present_flag,
		info->master_display_info.features,
		info->master_display_info.primaries[0][0],
		info->master_display_info.primaries[0][1],
		info->master_display_info.primaries[1][0],
		info->master_display_info.primaries[1][1],
		info->master_display_info.primaries[2][0],
		info->master_display_info.primaries[2][1],
		info->master_display_info.white_point[0],
		info->master_display_info.white_point[1],
		info->master_display_info.luminance[0],
		info->master_display_info.luminance[1]);
	len += sprintf(buf+len, "hdr_static_info:\n"
		"    hdr_support           %d\n"
		"    lumi_max              %d\n"
		"    lumi_avg              %d\n"
		"    lumi_min              %d\n",
		info->hdr_info.hdr_support,
		info->hdr_info.lumi_max,
		info->hdr_info.lumi_avg,
		info->hdr_info.lumi_min);
	len += sprintf(buf+len, "hdr_dynamic_info:");
	for (i = 0; i < 4; i++) {
		len += sprintf(buf+len,
			"\n    metadata_version:  %x\n"
			"    support_flags:     %x\n",
			info->hdr_info.dynamic_info[i].type,
			info->hdr_info.dynamic_info[i].support_flags);
		len += sprintf(buf+len, "    optional_fields:  ");
		for (j = 0; j <
			info->hdr_info.dynamic_info[i].of_len; j++) {
			len += sprintf(buf+len, " %x",
				info->hdr_info.dynamic_info[i].
				optional_fields[j]);
		}
	}
	len += sprintf(buf+len, "\n");
	len += sprintf(buf+len, "hdr10+:\n");
	len += sprintf(buf+len, "    ieeeoui: %x\n",
		info->hdr_info.hdr10plus_info.ieeeoui);
	len += sprintf(buf+len, "    application_version: %x\n",
		info->hdr_info.hdr10plus_info.application_version);

	return len;
}

static struct class_attribute vout_class_attrs[] = {
	__ATTR(mode,      0644, vout_mode_show, vout_mode_store),
	__ATTR(dummy,      0644, NULL, vout_dummy_store),
	__ATTR(axis,      0644, vout_axis_show, vout_axis_store),
	__ATTR(fr_policy, 0644,
		vout_fr_policy_show, vout_fr_policy_store),
	__ATTR(bist,      0644, vout_bist_show, vout_bist_store),
	__ATTR(vinfo,     0444, vout_vinfo_show, NULL),
};

static int vout_attr_create(void)
{
	int i;
	int ret = 0;

	/* create vout class */
	vout_class = class_create(THIS_MODULE, VOUT_CLASS_NAME);
	if (IS_ERR(vout_class)) {
		VOUTERR("create vout class fail\n");
		return -1;
	}

	/* create vout class attr files */
	for (i = 0; i < ARRAY_SIZE(vout_class_attrs); i++) {
		if (class_create_file(vout_class, &vout_class_attrs[i])) {
			VOUTERR("create vout attribute %s fail\n",
				vout_class_attrs[i].attr.name);
		}
	}

	VOUTPR("create vout attribute OK\n");

	return ret;
}

static int vout_attr_remove(void)
{
	int i;

	if (vout_class == NULL)
		return 0;

	for (i = 0; i < ARRAY_SIZE(vout_class_attrs); i++)
		class_remove_file(vout_class, &vout_class_attrs[i]);

	class_destroy(vout_class);
	vout_class = NULL;

	return 0;
}

/* ************************************************************* */
/* vout ioctl                                                    */
/* ************************************************************* */
static int vout_io_open(struct inode *inode, struct file *file)
{
	struct vout_cdev_s *vcdev;

	VOUTPR("%s\n", __func__);
	vcdev = container_of(inode->i_cdev, struct vout_cdev_s, cdev);
	file->private_data = vcdev;
	return 0;
}

static int vout_io_release(struct inode *inode, struct file *file)
{
	VOUTPR("%s\n", __func__);
	file->private_data = NULL;
	return 0;
}

static long vout_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	int ret = 0;
	void __user *argp;
	int mcd_nr;
	struct vinfo_s *info = NULL;
	struct vinfo_base_s baseinfo;

	mcd_nr = _IOC_NR(cmd);
	VOUTPR("%s: cmd_dir = 0x%x, cmd_nr = 0x%x\n",
		__func__, _IOC_DIR(cmd), mcd_nr);

	argp = (void __user *)arg;
	switch (mcd_nr) {
	case VOUT_IOC_NR_GET_VINFO:
		info = get_current_vinfo();
		if (info == NULL)
			ret = -EFAULT;
		else if (info->mode == VMODE_INIT_NULL)
			ret = -EFAULT;
		else {
			baseinfo.mode = info->mode;
			baseinfo.width = info->width;
			baseinfo.height = info->height;
			baseinfo.field_height = info->field_height;
			baseinfo.aspect_ratio_num = info->aspect_ratio_num;
			baseinfo.aspect_ratio_den = info->aspect_ratio_den;
			baseinfo.sync_duration_num = info->sync_duration_num;
			baseinfo.sync_duration_den = info->sync_duration_den;
			baseinfo.screen_real_width = info->screen_real_width;
			baseinfo.screen_real_height = info->screen_real_height;
			baseinfo.video_clk = info->video_clk;
			baseinfo.viu_color_fmt = info->viu_color_fmt;
			if (copy_to_user(argp, &baseinfo,
				sizeof(struct vinfo_base_s)))
				ret = -EFAULT;
		}
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

#ifdef CONFIG_COMPAT
static long vout_compat_ioctl(struct file *file, unsigned int cmd,
		unsigned long arg)
{
	unsigned long ret;

	arg = (unsigned long)compat_ptr(arg);
	ret = vout_ioctl(file, cmd, arg);
	return ret;
}
#endif

static const struct file_operations vout_fops = {
	.owner          = THIS_MODULE,
	.open           = vout_io_open,
	.release        = vout_io_release,
	.unlocked_ioctl = vout_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = vout_compat_ioctl,
#endif
};

static int vout_fops_create(void)
{
	int ret = 0;

	vout_cdev = kmalloc(sizeof(struct vout_cdev_s), GFP_KERNEL);
	if (!vout_cdev) {
		VOUTERR("failed to allocate vout_cdev\n");
		return -1;
	}

	ret = alloc_chrdev_region(&vout_cdev->devno, 0, 1, VOUT_CDEV_NAME);
	if (ret < 0) {
		VOUTERR("failed to alloc vout devno\n");
		goto vout_fops_err1;
	}

	cdev_init(&vout_cdev->cdev, &vout_fops);
	vout_cdev->cdev.owner = THIS_MODULE;
	ret = cdev_add(&vout_cdev->cdev, vout_cdev->devno, 1);
	if (ret) {
		VOUTERR("failed to add vout cdev\n");
		goto vout_fops_err2;
	}

	vout_cdev->dev = device_create(vout_class, NULL, vout_cdev->devno,
			NULL, VOUT_CDEV_NAME);
	if (IS_ERR(vout_cdev->dev)) {
		ret = PTR_ERR(vout_cdev->dev);
		VOUTERR("failed to create vout device: %d\n", ret);
		goto vout_fops_err3;
	}

	VOUTPR("%s OK\n", __func__);
	return 0;

vout_fops_err3:
	cdev_del(&vout_cdev->cdev);
vout_fops_err2:
	unregister_chrdev_region(vout_cdev->devno, 1);
vout_fops_err1:
	kfree(vout_cdev);
	vout_cdev = NULL;
	return -1;
}

static void vout_fops_remove(void)
{
	cdev_del(&vout_cdev->cdev);
	unregister_chrdev_region(vout_cdev->devno, 1);
	kfree(vout_cdev);
	vout_cdev = NULL;
}
/* ************************************************************* */

#ifdef CONFIG_PM
static int aml_vout_suspend(struct platform_device *pdev, pm_message_t state)
{
#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND

	if (early_suspend_flag)
		return 0;

#endif
	vout_suspend();
	return 0;
}

static int aml_vout_resume(struct platform_device *pdev)
{
#ifdef CONFIG_SCREEN_ON_EARLY

	if (early_resume_flag) {
		early_resume_flag = 0;
		return 0;
	}

#endif
#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND

	if (early_suspend_flag)
		return 0;

#endif
	vout_resume();
	return 0;
}
#endif

#ifdef CONFIG_HIBERNATION
static int aml_vout_freeze(struct device *dev)
{
	return 0;
}

static int aml_vout_thaw(struct device *dev)
{
	return 0;
}

static int aml_vout_restore(struct device *dev)
{
	enum vmode_e mode;

	mode = get_current_vmode();
	vout_notifier_call_chain(VOUT_EVENT_MODE_CHANGE, &mode);

	return 0;
}
static int aml_vout_pm_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);

	return aml_vout_suspend(pdev, PMSG_SUSPEND);
}
static int aml_vout_pm_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);

	return aml_vout_resume(pdev);
}
#endif

#ifdef CONFIG_SCREEN_ON_EARLY
void resume_vout_early(void)
{
#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND
	early_suspend_flag = 0;
	early_resume_flag = 1;
	vout_resume();
#endif
}
EXPORT_SYMBOL(resume_vout_early);
#endif

#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND
static void aml_vout_early_suspend(struct early_suspend *h)
{
	if (early_suspend_flag)
		return;

	vout_suspend();
	early_suspend_flag = 1;
}

static void aml_vout_late_resume(struct early_suspend *h)
{
	if (!early_suspend_flag)
		return;

	early_suspend_flag = 0;
	vout_resume();
}
#endif

/* ***************************************************** */
/* hdmi/cvbs output mode monitor */
/* ***************************************************** */
static int refresh_tvout_mode(void)
{
	enum vmode_e cur_vmode = VMODE_MAX;
	char cur_mode_str[VMODE_NAME_LEN_MAX];
	int hpd_state = 0;

	if (tvout_monitor_flag == 0)
		return 0;

	hpd_state = vout_get_hpd_state();
	if (hpd_state) {
		cur_vmode = validate_vmode(hdmimode);
		snprintf(cur_mode_str, VMODE_NAME_LEN_MAX, "%s", hdmimode);
	} else {
		cur_vmode = validate_vmode(cvbsmode);
		snprintf(cur_mode_str, VMODE_NAME_LEN_MAX, "%s", cvbsmode);
	}
	if (cur_vmode >= VMODE_MAX) {
		VOUTERR("%s: no matched cur_mode: %s, force to invalid\n",
			__func__, cur_mode_str);
		nulldisp_index = 1;
		cur_vmode = nulldisp_vinfo[nulldisp_index].mode;
		snprintf(cur_mode_str, VMODE_NAME_LEN_MAX, "%s",
			nulldisp_vinfo[nulldisp_index].name);
	}

	/* not box platform */
	if ((cur_vmode != VMODE_HDMI) &&
		(cur_vmode != VMODE_CVBS) &&
		(cur_vmode != VMODE_NULL) &&
		(cur_vmode != VMODE_INVALID))
		return -1;

	if (cur_vmode != last_vmode) {
		VOUTPR("%s: mode chang to %s\n", __func__, cur_mode_str);
		set_vout_mode(cur_mode_str);
		last_vmode = cur_vmode;
	}

	return 0;
}

static void aml_tvout_mode_work(struct work_struct *work)
{
	if (tvout_monitor_timeout_cnt-- == 0) {
		tvout_monitor_flag = 0;
		VOUTPR("%s: monitor_timeout\n", __func__);
		return;
	}

	mutex_lock(&vout_serve_mutex);
	refresh_tvout_mode();
	mutex_unlock(&vout_serve_mutex);

	if (tvout_monitor_flag)
		schedule_delayed_work(&tvout_mode_work, 1*HZ/2);
	else
		VOUTPR("%s: monitor stop\n", __func__);
}

static void aml_tvout_mode_monitor(void)
{
	if ((vout_init_vmode != VMODE_HDMI) &&
		(vout_init_vmode != VMODE_CVBS) &&
		(vout_init_vmode != VMODE_NULL) &&
		(vout_init_vmode != VMODE_INVALID))
		return;

	VOUTPR("%s\n", __func__);
	last_vmode = vout_init_vmode;
	tvout_monitor_flag = 1;
	INIT_DELAYED_WORK(&tvout_mode_work, aml_tvout_mode_work);

	mutex_lock(&vout_serve_mutex);
	refresh_tvout_mode();
	mutex_unlock(&vout_serve_mutex);

	schedule_delayed_work(&tvout_mode_work, 1*HZ/2);
}

static void aml_vout_extcon_register(struct platform_device *pdev)
{
	struct extcon_dev *edev;
	int ret;

	/*set display mode*/
	edev = extcon_dev_allocate(vout_cable);
	if (IS_ERR(edev)) {
		VOUTERR("failed to allocate vout extcon setmode\n");
		return;
	}

	edev->dev.parent = &pdev->dev;
	edev->name = "vout_excton_setmode";
	dev_set_name(&edev->dev, "setmode");
	ret = extcon_dev_register(edev);
	if (ret) {
		VOUTERR("failed to register vout extcon setmode\n");
		return;
	}
	vout_excton_setmode = edev;
}

static void aml_vout_extcon_free(void)
{
	extcon_dev_free(vout_excton_setmode);
	vout_excton_setmode = NULL;
}

/*****************************************************************
 **
 **	vout driver interface
 **
 ******************************************************************/
static int aml_vout_probe(struct platform_device *pdev)
{
	int ret = -1;

#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND
	early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN;
	early_suspend.suspend = aml_vout_early_suspend;
	early_suspend.resume = aml_vout_late_resume;
	register_early_suspend(&early_suspend);
#endif

	vout_class = NULL;
	ret = vout_attr_create();
	ret = vout_fops_create();

	vout_register_server(&nulldisp_vout_server);
	set_vout_init_mode();

	aml_vout_extcon_register(pdev);
	aml_tvout_mode_monitor();

	VOUTPR("%s OK\n", __func__);
	return ret;
}

static int aml_vout_remove(struct platform_device *pdev)
{
#ifdef CONFIG_AMLOGIC_LEGACY_EARLY_SUSPEND
	unregister_early_suspend(&early_suspend);
#endif

	aml_vout_extcon_free();
	vout_attr_remove();
	vout_fops_remove();
	vout_unregister_server(&nulldisp_vout_server);

	return 0;
}

static void aml_vout_shutdown(struct platform_device *pdev)
{
	VOUTPR("%s\n", __func__);
	vout_shutdown();
}

static const struct of_device_id aml_vout_dt_match[] = {
	{ .compatible = "amlogic, vout",},
	{ },
};

#ifdef CONFIG_HIBERNATION
const struct dev_pm_ops vout_pm = {
	.freeze		= aml_vout_freeze,
	.thaw		= aml_vout_thaw,
	.restore	= aml_vout_restore,
	.suspend	= aml_vout_pm_suspend,
	.resume		= aml_vout_pm_resume,
};
#endif

static struct platform_driver vout_driver = {
	.probe     = aml_vout_probe,
	.remove    = aml_vout_remove,
	.shutdown   = aml_vout_shutdown,
#ifdef CONFIG_PM
	.suspend   = aml_vout_suspend,
	.resume    = aml_vout_resume,
#endif
	.driver = {
		.name = "vout",
		.of_match_table = aml_vout_dt_match,
#ifdef CONFIG_HIBERNATION
		.pm = &vout_pm,
#endif
	},
};

static int __init vout_init_module(void)
{
	int ret = 0;

	if (platform_driver_register(&vout_driver)) {
		VOUTERR("failed to register VOUT driver\n");
		ret = -ENODEV;
	}

	return ret;
}

static __exit void vout_exit_module(void)
{
	platform_driver_unregister(&vout_driver);
}

subsys_initcall(vout_init_module);
module_exit(vout_exit_module);

static int str2lower(char *str)
{
	while (*str != '\0') {
		*str = tolower(*str);
		str++;
	}
	return 0;
}

static void vout_init_mode_parse(char *str)
{
	/* detect vout mode */
	if (strlen(str) <= 1) {
		VOUTERR("%s: %s\n", __func__, str);
		return;
	}

	/* detect uboot display */
	if (strncmp(str, "en", 2) == 0) { /* enable */
		uboot_display = 1;
		VOUTPR("%s: %d\n", str, uboot_display);
		return;
	}
	if (strncmp(str, "dis", 3) == 0) { /* disable */
		uboot_display = 0;
		VOUTPR("%s: %d\n", str, uboot_display);
		return;
	}

	/*
	 * just save the vmode_name,
	 * convert to vmode when vout sever registered
	 */
	snprintf(vout_mode_uboot, VMODE_NAME_LEN_MAX, "%s", str);
	vout_trim_string(vout_mode_uboot);
	VOUTPR("%s\n", str);
}

static int __init get_vout_init_mode(char *str)
{
	char *ptr = str;
	char sep[2];
	char *option;
	int count = 3;
	char find = 0;

	/* init void vout_mode_uboot name */
	memset(vout_mode_uboot, 0, sizeof(vout_mode_uboot));

	if (str == NULL)
		return -EINVAL;

	do {
		if (!isalpha(*ptr) && !isdigit(*ptr)) {
			find = 1;
			break;
		}
	} while (*++ptr != '\0');
	if (!find)
		return -EINVAL;

	sep[0] = *ptr;
	sep[1] = '\0';
	while ((count--) && (option = strsep(&str, sep))) {
		/* VOUTPR("%s\n", option); */
		str2lower(option);
		vout_init_mode_parse(option);
	}

	return 0;
}
__setup("vout=", get_vout_init_mode);

static int __init get_hdmi_mode(char *str)
{
	snprintf(hdmimode, VMODE_NAME_LEN_MAX, "%s", str);

	VOUTPR("get hdmimode: %s\n", hdmimode);
	return 0;
}
__setup("hdmimode=", get_hdmi_mode);

static int __init get_cvbs_mode(char *str)
{
	snprintf(cvbsmode, VMODE_NAME_LEN_MAX, "%s", str);

	VOUTPR("get cvbsmode: %s\n", cvbsmode);
	return 0;
}
__setup("cvbsmode=", get_cvbs_mode);

MODULE_AUTHOR("Platform-BJ <platform.bj@amlogic.com>");
MODULE_DESCRIPTION("VOUT Server Module");
MODULE_LICENSE("GPL");