drivers/amlogic/media/vout/lcd/lcd_extern/i2c_RT6947.c - u-boot - Git at Google

 /*
  * drivers/amlogic/media/vout/lcd/lcd_extern/i2c_RT6947.c
  *
  * Copyright (C) 2015 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.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */

 #include <common.h>
 #include <malloc.h>
 #include <asm/arch/gpio.h>
 #include <fdtdec.h>
 #include <amlogic/media/vout/lcd/aml_lcd.h>
 #include <amlogic/media/vout/lcd/lcd_extern.h>
 #include "lcd_extern.h"
 #include "../lcd_common.h"
 #include "../lcd_reg.h"

 #define LCD_EXTERN_NAME			"i2c_RT6947"
 #define LCD_EXTERN_TYPE			LCD_EXTERN_I2C
 #define LCD_EXTERN_I2C_ADDR		(0x66 >> 1) //7bit address


 #define GAMMA_EEPROM_WRITE

 static struct lcd_extern_config_s *ext_config;

 #define LCD_EXTERN_CMD_SIZE        LCD_EXT_CMD_SIZE_DYNAMIC
 static unsigned char gamma_init[] = {
 	0xc0, 89, 0x00,
 		0xA2, 0xD0, 0x80, 0x00, 0x10, 0x10, 0x59, 0x19, 0x4B, 0x0B,
 		0x3A, 0x13, 0x27, 0x2F, 0xC2, 0xC9, 0x29, 0xD2, 0x7A, 0x20,
 		0xA1, 0xC0, 0x15, 0x01, 0x36, 0x10, 0x10, 0xCB, 0x0A, 0x10,
 		0x2C, 0x1C, 0xA0, 0xFF, 0x00, 0x00, 0x0B, 0x02, 0x00, 0x00,
 		0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x10,
 		0x80, 0x00, 0x60, 0x00, 0x00, 0x00, 0x0D, 0x0D, 0x20, 0x02,
 		0x00, 0x20, 0x02, 0x00, 0x20, 0x02, 0x00, 0x20, 0x02, 0x00,
 		0x20, 0x02, 0x00, 0x20, 0x02, 0x00, 0x20, 0x02, 0x00, 0x20,
 		0x00, 0xFF, 0x00, 0x00, 0x0B, 0x02, 0x00, 0x00,
 	0xff, 0,  /* ending */
 };

 #ifdef GAMMA_EEPROM_WRITE
 static unsigned char mtp_en[]    = {0x64,0x01};
 static unsigned char eeprom_wr[] = {0xFF,0x80};
 #endif

 static int lcd_extern_power_cmd_dynamic_size(unsigned char *table)
 {
 	int i = 0, j, step = 0, delay_ms;
 	unsigned char type, cmd_size;
 	int ret = 0;
 	int max_len;

 	max_len = ext_config->table_init_on_cnt;
 	while ((i + 1) < max_len) {
 		type = table[i];
 		if (type == LCD_EXT_CMD_TYPE_END)
 			break;
 		if (lcd_debug_print_flag) {
 			EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
 				__func__, step, type, table[i+1]);
 		}
 		cmd_size = table[i+1];
 		if (cmd_size == 0)
 			goto power_cmd_dynamic_next;
 		if ((i + 2 + cmd_size) > max_len)
 			break;

 		if (type == LCD_EXT_CMD_TYPE_NONE) {
 			/* do nothing */
 		} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
 			if (cmd_size < 2) {
 				EXTERR("step %d: invalid cmd_size %d for GPIO\n",
 					step, cmd_size);
 				goto power_cmd_dynamic_next;
 			}
 			lcd_ext_gpio_set(table[i+2], table[i+3]);
 			if (cmd_size > 2) {
 				if (table[i+4] > 0)
 					mdelay(table[i+4]);
 			}
 		} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
 			delay_ms = 0;
 			for (j = 0; j < cmd_size; j++)
 				delay_ms += table[i+2+j];
 			if (delay_ms > 0)
 				mdelay(delay_ms);
 		} else if (type == LCD_EXT_CMD_TYPE_CMD) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr, &table[i+2], cmd_size);
 		} else if (type == LCD_EXT_CMD_TYPE_CMD2) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr2, &table[i+2], cmd_size);
 		} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr, &table[i+2], (cmd_size-1));
 			if (table[i+1+cmd_size] > 0)
 				mdelay(table[i+1+cmd_size]);
 		} else if (type == LCD_EXT_CMD_TYPE_CMD2_DELAY) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr2, &table[i+2], (cmd_size-1));
 			if (table[i+1+cmd_size] > 0)
 				mdelay(table[i+1+cmd_size]);
 		} else {
 			EXTERR("%s(%d: %s): type 0x%02x invalid\n",
 				__func__, ext_config->index, ext_config->name, type);
 		}
 power_cmd_dynamic_next:
 		i += (cmd_size + 2);
 		step++;
 	}

 	return ret;
 }

 static int lcd_extern_power_cmd_fixed_size(unsigned char *table)
 {
 	int i = 0, j, step = 0, delay_ms;
 	unsigned char type, cmd_size;
 	int ret = 0;
 	int max_len;

 	max_len = ext_config->table_init_on_cnt;
 	cmd_size = ext_config->cmd_size;
 	if (cmd_size < 2) {
 		EXTERR("%s: invalid cmd_size %d\n", __func__, cmd_size);
 		return -1;
 	}

 	while ((i + cmd_size) <= max_len) {
 		type = table[i];
 		if (type == LCD_EXT_CMD_TYPE_END)
 			break;
 		if (lcd_debug_print_flag) {
 			EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
 				__func__, step, type, cmd_size);
 		}
 		if (type == LCD_EXT_CMD_TYPE_NONE) {
 			/* do nothing */
 		} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
 			lcd_ext_gpio_set(table[i+1], table[i+2]);
 			if (cmd_size > 3) {
 				if (table[i+3] > 0)
 					mdelay(table[i+3]);
 			}
 		} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
 			delay_ms = 0;
 			for (j = 0; j < (cmd_size - 1); j++)
 				delay_ms += table[i+1+j];
 			if (delay_ms > 0)
 				mdelay(delay_ms);
 		} else if (type == LCD_EXT_CMD_TYPE_CMD) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr, &table[i+1], (cmd_size-1));
 		} else if (type == LCD_EXT_CMD_TYPE_CMD2) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr2, &table[i+1], (cmd_size-1));
 		} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr, &table[i+1], (cmd_size-2));
 			if (table[i+cmd_size-1] > 0)
 				mdelay(table[i+cmd_size-1]);
 		} else if (type == LCD_EXT_CMD_TYPE_CMD2_DELAY) {
 			ret = lcd_extern_i2c_write(ext_config->i2c_bus,
 				ext_config->i2c_addr2, &table[i+1], (cmd_size-2));
 			if (table[i+cmd_size-1] > 0)
 				mdelay(table[i+cmd_size-1]);
 		} else {
 			EXTERR("%s(%d: %s): type 0x%02x invalid\n",
 				__func__, ext_config->index, ext_config->name, type);
 		}
 		i += cmd_size;
 		step++;
 	}

 	return ret;
 }

 static int lcd_extern_power_cmd(unsigned char *table)
 {
 	int cmd_size;
 	int ret = 0;

 	cmd_size = ext_config->cmd_size;
 	if (cmd_size < 1) {
 		EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size);
 		return -1;
 	}
 	if (table == NULL)
 		return -1;

 	if (cmd_size == LCD_EXT_CMD_SIZE_DYNAMIC)
 		ret = lcd_extern_power_cmd_dynamic_size(table);
 	else
 		ret = lcd_extern_power_cmd_fixed_size(table);

 	return ret;
 }

 #ifdef GAMMA_EEPROM_WRITE
 static int lcd_extern_init_check(int len)
 {
 	int ret = 0;
 	unsigned char *chk_table;
 	int i;

 	chk_table = (unsigned char *)malloc(sizeof(unsigned char) * len);
 	if (chk_table == NULL) {
 		EXTERR("%s: failed to alloc chk_table, not enough memory\n", LCD_EXTERN_NAME);
 		ret = lcd_extern_power_cmd(ext_config->table_init_on);
 		return ret;
 	}
 	memset(chk_table, 0, len);

 	ret = lcd_extern_i2c_read(ext_config->i2c_bus, ext_config->i2c_addr, chk_table, len);
 	if (ret == 0) {
 		for (i = 0; i < len; i++) {
 			if (chk_table[i] != ext_config->table_init_on[i+3])
 				return -1;
 		}
 	}

 	return 0;
 }
 #endif

 static int lcd_extern_power_on(void)
 {
 	int ret = 0;
 #ifdef GAMMA_EEPROM_WRITE
 	int len;
 #endif

 	lcd_extern_pinmux_set(1);

 #ifdef GAMMA_EEPROM_WRITE
 	len = ext_config->table_init_on[1] - 2;
 	/* check gamma is init or not */
 	ret = lcd_extern_init_check(len);
 	if (ret) {
 		EXTPR("RT6947: need init gamma and mtp write\n");
 		lcd_extern_power_cmd(ext_config->table_init_on);
 		/* enable mtp */
 		len = sizeof(mtp_en) / sizeof(unsigned char);
 		lcd_extern_i2c_write(ext_config->i2c_bus, ext_config->i2c_addr, mtp_en, len);
 		/* write eeprom */
 		len = sizeof(eeprom_wr) / sizeof(unsigned char);
 		lcd_extern_i2c_write(ext_config->i2c_bus, ext_config->i2c_addr, eeprom_wr, len);
 	}
 #else
 	lcd_extern_power_cmd(ext_config->table_init_on);
 #endif

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

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

 	lcd_extern_pinmux_set(0);
 	return ret;
 }

 static int lcd_extern_driver_update(struct aml_lcd_extern_driver_s *ext_drv)
 {
 	if (ext_drv == NULL) {
 		EXTERR("%s driver is null\n", LCD_EXTERN_NAME);
 		return -1;
 	}

 	if (ext_drv->config->table_init_loaded == 0) {
 		ext_drv->config->cmd_size = LCD_EXTERN_CMD_SIZE;
 		ext_drv->config->table_init_on = gamma_init;
 		ext_drv->config->table_init_on_cnt = sizeof(gamma_init);
 	}

 	ext_drv->power_on  = lcd_extern_power_on;
 	ext_drv->power_off = lcd_extern_power_off;

 	return 0;
 }

 int lcd_extern_i2c_RT6947_probe(struct aml_lcd_extern_driver_s *ext_drv)
 {
 	int ret = 0;

 	ext_config = ext_drv->config;
 	ret = lcd_extern_driver_update(ext_drv);

 	if (lcd_debug_print_flag)
 		EXTPR("%s: %d\n", __func__, ret);
 	return ret;
 }
	/*
	* drivers/amlogic/media/vout/lcd/lcd_extern/i2c_RT6947.c
	*
	* Copyright (C) 2015 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.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	*/

	#include <common.h>
	#include <malloc.h>
	#include <asm/arch/gpio.h>
	#include <fdtdec.h>
	#include <amlogic/media/vout/lcd/aml_lcd.h>
	#include <amlogic/media/vout/lcd/lcd_extern.h>
	#include "lcd_extern.h"
	#include "../lcd_common.h"
	#include "../lcd_reg.h"

	#define LCD_EXTERN_NAME "i2c_RT6947"
	#define LCD_EXTERN_TYPE LCD_EXTERN_I2C
	#define LCD_EXTERN_I2C_ADDR (0x66 >> 1) //7bit address


	#define GAMMA_EEPROM_WRITE

	static struct lcd_extern_config_s *ext_config;

	#define LCD_EXTERN_CMD_SIZE LCD_EXT_CMD_SIZE_DYNAMIC
	static unsigned char gamma_init[] = {
	0xc0, 89, 0x00,
	0xA2, 0xD0, 0x80, 0x00, 0x10, 0x10, 0x59, 0x19, 0x4B, 0x0B,
	0x3A, 0x13, 0x27, 0x2F, 0xC2, 0xC9, 0x29, 0xD2, 0x7A, 0x20,
	0xA1, 0xC0, 0x15, 0x01, 0x36, 0x10, 0x10, 0xCB, 0x0A, 0x10,
	0x2C, 0x1C, 0xA0, 0xFF, 0x00, 0x00, 0x0B, 0x02, 0x00, 0x00,
	0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x10,
	0x80, 0x00, 0x60, 0x00, 0x00, 0x00, 0x0D, 0x0D, 0x20, 0x02,
	0x00, 0x20, 0x02, 0x00, 0x20, 0x02, 0x00, 0x20, 0x02, 0x00,
	0x20, 0x02, 0x00, 0x20, 0x02, 0x00, 0x20, 0x02, 0x00, 0x20,
	0x00, 0xFF, 0x00, 0x00, 0x0B, 0x02, 0x00, 0x00,
	0xff, 0, /* ending */
	};

	#ifdef GAMMA_EEPROM_WRITE
	static unsigned char mtp_en[] = {0x64,0x01};
	static unsigned char eeprom_wr[] = {0xFF,0x80};
	#endif

	static int lcd_extern_power_cmd_dynamic_size(unsigned char *table)
	{
	int i = 0, j, step = 0, delay_ms;
	unsigned char type, cmd_size;
	int ret = 0;
	int max_len;

	max_len = ext_config->table_init_on_cnt;
	while ((i + 1) < max_len) {
	type = table[i];
	if (type == LCD_EXT_CMD_TYPE_END)
	break;
	if (lcd_debug_print_flag) {
	EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
	__func__, step, type, table[i+1]);
	}
	cmd_size = table[i+1];
	if (cmd_size == 0)
	goto power_cmd_dynamic_next;
	if ((i + 2 + cmd_size) > max_len)
	break;

	if (type == LCD_EXT_CMD_TYPE_NONE) {
	/* do nothing */
	} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
	if (cmd_size < 2) {
	EXTERR("step %d: invalid cmd_size %d for GPIO\n",
	step, cmd_size);
	goto power_cmd_dynamic_next;
	}
	lcd_ext_gpio_set(table[i+2], table[i+3]);
	if (cmd_size > 2) {
	if (table[i+4] > 0)
	mdelay(table[i+4]);
	}
	} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
	delay_ms = 0;
	for (j = 0; j < cmd_size; j++)
	delay_ms += table[i+2+j];
	if (delay_ms > 0)
	mdelay(delay_ms);
	} else if (type == LCD_EXT_CMD_TYPE_CMD) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr, &table[i+2], cmd_size);
	} else if (type == LCD_EXT_CMD_TYPE_CMD2) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr2, &table[i+2], cmd_size);
	} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr, &table[i+2], (cmd_size-1));
	if (table[i+1+cmd_size] > 0)
	mdelay(table[i+1+cmd_size]);
	} else if (type == LCD_EXT_CMD_TYPE_CMD2_DELAY) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr2, &table[i+2], (cmd_size-1));
	if (table[i+1+cmd_size] > 0)
	mdelay(table[i+1+cmd_size]);
	} else {
	EXTERR("%s(%d: %s): type 0x%02x invalid\n",
	__func__, ext_config->index, ext_config->name, type);
	}
	power_cmd_dynamic_next:
	i += (cmd_size + 2);
	step++;
	}

	return ret;
	}

	static int lcd_extern_power_cmd_fixed_size(unsigned char *table)
	{
	int i = 0, j, step = 0, delay_ms;
	unsigned char type, cmd_size;
	int ret = 0;
	int max_len;

	max_len = ext_config->table_init_on_cnt;
	cmd_size = ext_config->cmd_size;
	if (cmd_size < 2) {
	EXTERR("%s: invalid cmd_size %d\n", __func__, cmd_size);
	return -1;
	}

	while ((i + cmd_size) <= max_len) {
	type = table[i];
	if (type == LCD_EXT_CMD_TYPE_END)
	break;
	if (lcd_debug_print_flag) {
	EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
	__func__, step, type, cmd_size);
	}
	if (type == LCD_EXT_CMD_TYPE_NONE) {
	/* do nothing */
	} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
	lcd_ext_gpio_set(table[i+1], table[i+2]);
	if (cmd_size > 3) {
	if (table[i+3] > 0)
	mdelay(table[i+3]);
	}
	} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
	delay_ms = 0;
	for (j = 0; j < (cmd_size - 1); j++)
	delay_ms += table[i+1+j];
	if (delay_ms > 0)
	mdelay(delay_ms);
	} else if (type == LCD_EXT_CMD_TYPE_CMD) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr, &table[i+1], (cmd_size-1));
	} else if (type == LCD_EXT_CMD_TYPE_CMD2) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr2, &table[i+1], (cmd_size-1));
	} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr, &table[i+1], (cmd_size-2));
	if (table[i+cmd_size-1] > 0)
	mdelay(table[i+cmd_size-1]);
	} else if (type == LCD_EXT_CMD_TYPE_CMD2_DELAY) {
	ret = lcd_extern_i2c_write(ext_config->i2c_bus,
	ext_config->i2c_addr2, &table[i+1], (cmd_size-2));
	if (table[i+cmd_size-1] > 0)
	mdelay(table[i+cmd_size-1]);
	} else {
	EXTERR("%s(%d: %s): type 0x%02x invalid\n",
	__func__, ext_config->index, ext_config->name, type);
	}
	i += cmd_size;
	step++;
	}

	return ret;
	}

	static int lcd_extern_power_cmd(unsigned char *table)
	{
	int cmd_size;
	int ret = 0;

	cmd_size = ext_config->cmd_size;
	if (cmd_size < 1) {
	EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size);
	return -1;
	}
	if (table == NULL)
	return -1;

	if (cmd_size == LCD_EXT_CMD_SIZE_DYNAMIC)
	ret = lcd_extern_power_cmd_dynamic_size(table);
	else
	ret = lcd_extern_power_cmd_fixed_size(table);

	return ret;
	}

	#ifdef GAMMA_EEPROM_WRITE
	static int lcd_extern_init_check(int len)
	{
	int ret = 0;
	unsigned char *chk_table;
	int i;

	chk_table = (unsigned char )malloc(sizeof(unsigned char) len);
	if (chk_table == NULL) {
	EXTERR("%s: failed to alloc chk_table, not enough memory\n", LCD_EXTERN_NAME);
	ret = lcd_extern_power_cmd(ext_config->table_init_on);
	return ret;
	}
	memset(chk_table, 0, len);

	ret = lcd_extern_i2c_read(ext_config->i2c_bus, ext_config->i2c_addr, chk_table, len);
	if (ret == 0) {
	for (i = 0; i < len; i++) {
	if (chk_table[i] != ext_config->table_init_on[i+3])
	return -1;
	}
	}

	return 0;
	}
	#endif

	static int lcd_extern_power_on(void)
	{
	int ret = 0;
	#ifdef GAMMA_EEPROM_WRITE
	int len;
	#endif

	lcd_extern_pinmux_set(1);

	#ifdef GAMMA_EEPROM_WRITE
	len = ext_config->table_init_on[1] - 2;
	/* check gamma is init or not */
	ret = lcd_extern_init_check(len);
	if (ret) {
	EXTPR("RT6947: need init gamma and mtp write\n");
	lcd_extern_power_cmd(ext_config->table_init_on);
	/* enable mtp */
	len = sizeof(mtp_en) / sizeof(unsigned char);
	lcd_extern_i2c_write(ext_config->i2c_bus, ext_config->i2c_addr, mtp_en, len);
	/* write eeprom */
	len = sizeof(eeprom_wr) / sizeof(unsigned char);
	lcd_extern_i2c_write(ext_config->i2c_bus, ext_config->i2c_addr, eeprom_wr, len);
	}
	#else
	lcd_extern_power_cmd(ext_config->table_init_on);
	#endif

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

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

	lcd_extern_pinmux_set(0);
	return ret;
	}

	static int lcd_extern_driver_update(struct aml_lcd_extern_driver_s *ext_drv)
	{
	if (ext_drv == NULL) {
	EXTERR("%s driver is null\n", LCD_EXTERN_NAME);
	return -1;
	}

	if (ext_drv->config->table_init_loaded == 0) {
	ext_drv->config->cmd_size = LCD_EXTERN_CMD_SIZE;
	ext_drv->config->table_init_on = gamma_init;
	ext_drv->config->table_init_on_cnt = sizeof(gamma_init);
	}

	ext_drv->power_on = lcd_extern_power_on;
	ext_drv->power_off = lcd_extern_power_off;

	return 0;
	}

	int lcd_extern_i2c_RT6947_probe(struct aml_lcd_extern_driver_s *ext_drv)
	{
	int ret = 0;

	ext_config = ext_drv->config;
	ret = lcd_extern_driver_update(ext_drv);

	if (lcd_debug_print_flag)
	EXTPR("%s: %d\n", __func__, ret);
	return ret;
	}