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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <delay.h>
#include <drivers/parade/ps8640/ps8640.h>
#include <edid.h>
#include <gpio.h>
#include <soc/i2c.h>
#include <soc/regulator.h>
#include "display.h"
#include "gpio.h"
static void bridge_ps8640_power_on(void)
{
/*
* PS8640 power-on sequence is described in chapter 14, PS8640_DS_V1.4_20200210.docx
* - set VDD12 to be 1.2V
* - delay 100us
* - set VDD33 to be 3.3V
* - pull hign PD#
* - pull down RST#
* - delay 2ms
* - pull high RST#
* - delay more than 50ms (55ms for margin)
* - pull down RST#
* - delay more than 50ms (55ms for margin)
* - pull high RST#
*/
/* Set VRF12 to 1.2V and VCN33 to 3.3V */
mainboard_set_regulator_voltage(MTK_REGULATOR_VRF12, 1200000);
udelay(100);
mainboard_set_regulator_voltage(MTK_REGULATOR_VCN33, 3300000);
udelay(200);
/* Turn on bridge */
gpio_output(GPIO_EDPBRDG_PWREN, 1);
gpio_output(GPIO_EDPBRDG_RST_L, 0);
mdelay(2);
gpio_output(GPIO_EDPBRDG_RST_L, 1);
mdelay(55);
gpio_output(GPIO_EDPBRDG_RST_L, 0);
mdelay(55);
gpio_output(GPIO_EDPBRDG_RST_L, 1);
}
static int bridge_ps8640_get_edid(u8 i2c_bus, struct edid *edid)
{
const u8 chip = 0x8;
if (ps8640_init(i2c_bus, chip) < 0) {
printk(BIOS_ERR, "%s: Can't init PS8640 bridge\n", __func__);
return -1;
}
if (ps8640_get_edid(i2c_bus, chip, edid) < 0) {
printk(BIOS_ERR, "%s: Can't get panel's edid\n", __func__);
return -1;
}
return 0;
}
static struct panel_serializable_data ps8640_data;
static struct panel_description ps8640_bridge = {
.s = &ps8640_data,
.orientation = LB_FB_ORIENTATION_NORMAL,
};
struct panel_description *get_ps8640_description(void)
{
mtk_i2c_bus_init(BRIDGE_I2C, I2C_SPEED_FAST);
bridge_ps8640_power_on();
if (bridge_ps8640_get_edid(BRIDGE_I2C, &ps8640_bridge.s->edid) < 0) {
printk(BIOS_ERR, "Can't get panel's edid\n");
return NULL;
}
return &ps8640_bridge;
}
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