src/mainboard/google/kukui/panel_ps8640.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <delay.h>
   5 #include <drivers/parade/ps8640/ps8640.h>
   6 #include <edid.h>
   7 #include <gpio.h>
   8 #include <soc/i2c.h>
   9
  10 #include "panel.h"
  11
  12 static void power_on_ps8640(void)
  13 {
  14         /* Disable backlight before turning on bridge */
  15         gpio_output(GPIO(PERIPHERAL_EN13), 0);
  16         gpio_output(GPIO(DISP_PWM), 0);
  17
  18         /* Turn on bridge */
  19         gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 0);
  20         gpio_output(GPIO_PP1200_MIPIBRDG_EN, 1);
  21         gpio_output(GPIO_VDDIO_MIPIBRDG_EN, 1);
  22         mdelay(2);
  23         gpio_output(GPIO_MIPIBRDG_PWRDN_L_1V8, 1);
  24         mdelay(2);
  25         gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 1);
  26         gpio_output(GPIO_PP3300_LCM_EN, 1);
  27 }
  28
  29 static void dummy_power_on(void)
  30 {
  31         /* The panel has been already powered on when getting panel information
  32          * so we should do nothing here.
  33          */
  34 }
  35
  36 static struct panel_serializable_data ps8640_data = {
  37         .init = { PANEL_END },
  38 };
  39
  40 static struct panel_description ps8640_panel = {
  41         .s = &ps8640_data,
  42         .orientation = LB_FB_ORIENTATION_NORMAL,
  43         .power_on = dummy_power_on,
  44 };
  45
  46 struct panel_description *get_panel_description(int panel_id)
  47 {
  48         /* To read panel EDID, we have to first power on PS8640. */
  49         power_on_ps8640();
  50
  51         u8 i2c_bus = 4, i2c_addr = 0x08;
  52         mtk_i2c_bus_init(i2c_bus);
  53
  54         ps8640_init(i2c_bus, i2c_addr);
  55         struct edid *edid = &ps8640_data.edid;
  56         if (ps8640_get_edid(i2c_bus, i2c_addr, edid)) {
  57                 printk(BIOS_ERR, "Can't get panel's edid\n");
  58                 return NULL;
  59         }
  60         return &ps8640_panel;
  61 }