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/*
* Copyright 2014 Freescale Semiconductor, Inc.
* Authors: Priyanka Jain <Priyanka.Jain@freescale.com>
* Wang Dongsheng <dongsheng.wang@freescale.com>
*
* This file is copied and modified from the original t1040qds/diu.c.
* Encoder can be used in T104x and LSx Platform.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <stdio_dev.h>
#include <i2c.h>
#define I2C_DVI_INPUT_DATA_FORMAT_REG 0x1F
#define I2C_DVI_PLL_CHARGE_CNTL_REG 0x33
#define I2C_DVI_PLL_DIVIDER_REG 0x34
#define I2C_DVI_PLL_SUPPLY_CNTL_REG 0x35
#define I2C_DVI_PLL_FILTER_REG 0x36
#define I2C_DVI_TEST_PATTERN_REG 0x48
#define I2C_DVI_POWER_MGMT_REG 0x49
#define I2C_DVI_LOCK_STATE_REG 0x4D
#define I2C_DVI_SYNC_POLARITY_REG 0x56
/*
* Set VSYNC/HSYNC to active high. This is polarity of sync signals
* from DIU->DVI. The DIU default is active igh, so DVI is set to
* active high.
*/
#define I2C_DVI_INPUT_DATA_FORMAT_VAL 0x98
#define I2C_DVI_PLL_CHARGE_CNTL_HIGH_SPEED_VAL 0x06
#define I2C_DVI_PLL_DIVIDER_HIGH_SPEED_VAL 0x26
#define I2C_DVI_PLL_FILTER_HIGH_SPEED_VAL 0xA0
#define I2C_DVI_PLL_CHARGE_CNTL_LOW_SPEED_VAL 0x08
#define I2C_DVI_PLL_DIVIDER_LOW_SPEED_VAL 0x16
#define I2C_DVI_PLL_FILTER_LOW_SPEED_VAL 0x60
/* Clear test pattern */
#define I2C_DVI_TEST_PATTERN_VAL 0x18
/* Exit Power-down mode */
#define I2C_DVI_POWER_MGMT_VAL 0xC0
/* Monitor polarity is handled via DVI Sync Polarity Register */
#define I2C_DVI_SYNC_POLARITY_VAL 0x00
/* Programming of HDMI Chrontel CH7301 connector */
int diu_set_dvi_encoder(unsigned int pixclock)
{
int ret;
u8 temp;
temp = I2C_DVI_TEST_PATTERN_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_TEST_PATTERN_REG, 1,
&temp, 1);
if (ret) {
puts("I2C: failed to select proper dvi test pattern\n");
return ret;
}
temp = I2C_DVI_INPUT_DATA_FORMAT_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_INPUT_DATA_FORMAT_REG,
1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi input data format\n");
return ret;
}
/* Set Sync polarity register */
temp = I2C_DVI_SYNC_POLARITY_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_SYNC_POLARITY_REG, 1,
&temp, 1);
if (ret) {
puts("I2C: failed to select dvi syc polarity\n");
return ret;
}
/* Set PLL registers based on pixel clock rate*/
if (pixclock > 65000000) {
temp = I2C_DVI_PLL_CHARGE_CNTL_HIGH_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_CHARGE_CNTL_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll charge_cntl\n");
return ret;
}
temp = I2C_DVI_PLL_DIVIDER_HIGH_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_DIVIDER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll divider\n");
return ret;
}
temp = I2C_DVI_PLL_FILTER_HIGH_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_FILTER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll filter\n");
return ret;
}
} else {
temp = I2C_DVI_PLL_CHARGE_CNTL_LOW_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_CHARGE_CNTL_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll charge_cntl\n");
return ret;
}
temp = I2C_DVI_PLL_DIVIDER_LOW_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_DIVIDER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll divider\n");
return ret;
}
temp = I2C_DVI_PLL_FILTER_LOW_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_FILTER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll filter\n");
return ret;
}
}
temp = I2C_DVI_POWER_MGMT_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_POWER_MGMT_REG, 1,
&temp, 1);
if (ret) {
puts("I2C: failed to select dvi power mgmt\n");
return ret;
}
udelay(500);
return 0;
}
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