panel_anx7625.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <delay.h>
#include <drivers/analogix/anx7625/anx7625.h>
#include <edid.h>
#include <gpio.h>
#include <soc/dsi.h>
#include <soc/i2c.h>
 
#include "panel.h"
 
#define ANX7625_I2C_BUS 4
 
static struct panel_serializable_data anx7625_data = {
        .init = { PANEL_END },
};
 
static void dummy_power_on(void)
{
        /*
         * The panel has been already powered on when getting panel information
         * so we should do nothing here.
         */
}
 
static void start_anx7625(void)
{
        if (anx7625_dp_start(ANX7625_I2C_BUS, &anx7625_data.edid) < 0)
                printk(BIOS_ERR, "Can't start display via ANX7625.\n");
}
 
static struct panel_description anx7625_panel = {
        .s = &anx7625_data,
        .orientation = LB_FB_ORIENTATION_NORMAL,
        .power_on = dummy_power_on,
        .post_power_on = start_anx7625,
};
 
static void power_on_anx7625(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);
        gpio_output(GPIO_PP1800_LCM_EN, 1);
        mdelay(2);
        gpio_output(GPIO_MIPIBRDG_PWRDN_L_1V8, 1);
        mdelay(10);
        gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 1);
        gpio_output(GPIO_PP3300_LCM_EN, 1);
}
 
struct panel_description *get_panel_description(int panel_id)
{
        /* To read panel EDID, we have to first power on anx7625. */
        power_on_anx7625();
 
        mtk_i2c_bus_init(ANX7625_I2C_BUS);
 
        if (anx7625_init(ANX7625_I2C_BUS)) {
                printk(BIOS_ERR, "Can't init ANX7625 bridge.\n");
                return NULL;
        }
 
        if (anx7625_dp_get_edid(ANX7625_I2C_BUS, &anx7625_data.edid)) {
                printk(BIOS_ERR, "Can't get panel's edid.\n");
                return NULL;
        }
        return &anx7625_panel;
}
 
void mtk_dsi_override_phy_timing(struct mtk_phy_timing *timing)
{
        timing->da_hs_trail += 9;
}