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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014-2019 Siemens AG
*
* 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; version 2 of the License.
*
* 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.
*/
#include <console/console.h>
#include <device/device.h>
#include <drivers/i2c/ptn3460/ptn3460.h>
#include <hwilib.h>
#include <string.h>
#include <types.h>
#include "soc/gpio.h"
#include "lcd_panel.h"
# define MAX_HWI_NAME_LENGTH 20
/** \brief Reads GPIOs used for LCD panel encoding and returns the 4 bit value
* @param no parameters
* @return LCD panel type encoded in 4 bits
*/
static u8 get_lcd_panel_type(void)
{
u8 lcd_type_gpio;
lcd_type_gpio = ((read_ssus_gpio(LCD_TYPE_GPIO_BIT3) << 3) |
(read_ssus_gpio(LCD_TYPE_GPIO_BIT2) << 2) |
(read_ssus_gpio(LCD_TYPE_GPIO_BIT1) << 1) |
(read_ssus_gpio(LCD_TYPE_GPIO_BIT0)));
/* There is an inverter in this signals so we need to invert them as well */
return ((~lcd_type_gpio) & 0x0f);
}
/** \brief This function checks which LCD panel type is used with the mainboard
* and provides the name of the matching EDID data set in CBFS.
* @param Pointer to the filename in CBFS where the EDID data is located
* @return CB_SUCCESS on success otherwise CB_ERR
*/
static enum cb_err get_hwi_filename(char *hwi_block)
{
u8 lcd_type;
enum cb_err ret = CB_SUCCESS;
lcd_type = get_lcd_panel_type();
printk(BIOS_INFO, "LCD: Found panel type %d\n", lcd_type);
switch (lcd_type) {
case LCD_PANEL_TYPE_10_INCH:
strcpy(hwi_block, "hwinfo10.hex");
break;
case LCD_PANEL_TYPE_12_INCH:
strcpy(hwi_block, "hwinfo12.hex");
break;
case LCD_PANEL_TYPE_15_INCH:
strcpy(hwi_block, "hwinfo15.hex");
break;
case LCD_PANEL_TYPE_19_INCH:
strcpy(hwi_block, "hwinfo19.hex");
break;
case LCD_PANEL_TYPE_EDID:
strcpy(hwi_block, "hwinfo.hex");
break;
default:
printk(BIOS_ERR, "LCD: No supported panel found.\n");
ret = CB_ERR;
break;
}
return ret;
}
/** \brief This function provides EDID data to the driver for DP2LVDS Bridge (PTN3460)
* @param edid_data pointer to EDID data in driver
*/
enum cb_err mb_get_edid(uint8_t edid_data[0x80])
{
char hwi_block[MAX_HWI_NAME_LENGTH];
if (get_hwi_filename(hwi_block) != CB_SUCCESS)
return CB_ERR;
if (hwilib_find_blocks(hwi_block) != CB_SUCCESS) {
printk(BIOS_ERR, "LCD: Info block \"%s\" not found!\n", hwi_block);
return CB_ERR;
}
/* Get EDID data from hwinfo block */
if (hwilib_get_field(Edid, edid_data, PTN_EDID_LEN) != PTN_EDID_LEN) {
printk(BIOS_ERR, "LCD: No EDID data available in %s\n", hwi_block);
return CB_ERR;
}
return CB_SUCCESS;
}
/** \brief This function provides EDID block [0..6] to the driver for DP2LVDS Bridge (PTN3460)
* which has to be used.
*/
uint8_t mb_select_edid_table(void)
{
return 6; /* With this mainboard we use EDID block 6 for emulation in PTN3460. */
}
/** \brief Function to enable mainboard to adjust the config data of PTN3460.
* @param *cfg_ptr Pointer to the PTN config structure to modify.
* @return -1 on error; PTN_CFG_MODIFIED if data was modified and needs to be updated.
*/
int mb_adjust_cfg(struct ptn_3460_config *cfg)
{
char hwi_block[MAX_HWI_NAME_LENGTH];
uint8_t disp_con = 0, color_depth = 0;
uint8_t hwid[4], tcu31_hwid[4] = {7, 9, 2, 0};
if (get_hwi_filename(hwi_block) != CB_SUCCESS)
return -1;
if (hwilib_find_blocks(hwi_block) != CB_SUCCESS) {
printk(BIOS_ERR, "LCD: Info block \"%s\" not found!\n", hwi_block);
return -1;
}
if (hwilib_get_field(PF_DisplCon, &disp_con, sizeof(disp_con)) != sizeof(disp_con)) {
printk(BIOS_ERR, "LCD: Missing panel features from %s\n", hwi_block);
return -1;
}
if (hwilib_get_field(PF_Color_Depth, &color_depth,
sizeof(color_depth)) != sizeof(color_depth)) {
printk(BIOS_ERR, "LCD: Missing panel features from %s\n", hwi_block);
return -1;
}
/* Set up configuration data according to the hwinfo block we got. */
cfg->dp_interface_ctrl = 0x00;
cfg->lvds_interface_ctrl1 = 0x00;
if (disp_con == PF_DISPLCON_LVDS_DUAL) {
/* Turn on dual LVDS lane and clock. */
cfg->lvds_interface_ctrl1 |= 0x0b;
}
if (color_depth == PF_COLOR_DEPTH_6BIT) {
/* Use 18 bits per pixel. */
cfg->lvds_interface_ctrl1 |= 0x20;
}
/* No clock spreading, 300 mV LVDS swing. */
cfg->lvds_interface_ctrl2 = 0x03;
/* Swap LVDS even and odd lanes for HW-ID 7.9.2.0 only. */
if (hwilib_get_field(HWID, hwid, sizeof(hwid)) == sizeof(hwid) &&
!(memcmp(hwid, tcu31_hwid, sizeof(hwid)))) {
/* Swap LVDS even and odd lane. */
cfg->lvds_interface_ctrl3 = 0x01;
} else {
/* no LVDS lane swap */
cfg->lvds_interface_ctrl3 = 0x00;
}
/* Delay T2 (VDD to LVDS active) by 16 ms. */
cfg->t2_delay = 1;
/* 500 ms from LVDS to backlight active. */
cfg->t3_timing = 10;
/* 1 second re-power delay. */
cfg->t12_timing = 20;
/* 150 ms backlight off to LVDS inactive. */
cfg->t4_timing = 3;
/* Delay T5 (LVDS to VDD inactive) by 16 ms. */
cfg->t5_delay = 1;
/* Enable backlight control. */
cfg->backlight_ctrl = 0;
return PTN_CFG_MODIFIED;
}
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