panel_ps8640.c

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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 "panel.h"
 
static void power_on_ps8640(void)
{
        /* Disable backlight before turning on bridge */
        gpio_output(GPIO(PERIPHERAL_EN13), 0);
        gpio_output(GPIO(DISP_PWM), 0);
 
        /* Turn on bridge */
        gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 0);
        gpio_output(GPIO_PP1200_MIPIBRDG_EN, 1);
        gpio_output(GPIO_VDDIO_MIPIBRDG_EN, 1);
        mdelay(2);
        gpio_output(GPIO_MIPIBRDG_PWRDN_L_1V8, 1);
        mdelay(2);
        gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 1);
        gpio_output(GPIO_PP3300_LCM_EN, 1);
}
 
static void dummy_power_on(void)
{
        /* The panel has been already powered on when getting panel information
         * so we should do nothing here.
         */
}
 
static struct panel_serializable_data ps8640_data = {
        .init = { PANEL_END },
};
 
static struct panel_description ps8640_panel = {
        .s = &ps8640_data,
        .orientation = LB_FB_ORIENTATION_NORMAL,
        .power_on = dummy_power_on,
};
 
struct panel_description *get_panel_description(int panel_id)
{
        /* To read panel EDID, we have to first power on PS8640. */
        power_on_ps8640();
 
        u8 i2c_bus = 4, i2c_addr = 0x08;
        mtk_i2c_bus_init(i2c_bus);
 
        ps8640_init(i2c_bus, i2c_addr);
        struct edid *edid = &ps8640_data.edid;
        if (ps8640_get_edid(i2c_bus, i2c_addr, edid)) {
                printk(BIOS_ERR, "Can't get panel's edid\n");
                return NULL;
        }
        return &ps8640_panel;
}