| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2017 Google Inc. |
| * |
| * 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 <baseboard/variants.h> |
| #include <bootmode.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <gpio.h> |
| #include <soc/gpio.h> |
| #include <soc/ramstage.h> |
| #include <timer.h> |
| |
| #include <variant/gpio.h> |
| |
| #define GPIO_HDMI_HPD GPP_E13 |
| #define GPIO_DP_HPD GPP_E14 |
| |
| /* TODO: This can be moved to common directory */ |
| static void wait_for_hpd(gpio_t gpio, long timeout) |
| { |
| struct stopwatch sw; |
| |
| printk(BIOS_INFO, "Waiting for HPD\n"); |
| gpio_input(gpio); |
| |
| stopwatch_init_msecs_expire(&sw, timeout); |
| while (!gpio_get(gpio)) { |
| if (stopwatch_expired(&sw)) { |
| printk(BIOS_WARNING, |
| "HPD not ready after %ldms. Abort.\n", timeout); |
| return; |
| } |
| mdelay(200); |
| } |
| printk(BIOS_INFO, "HPD ready after %lu ms\n", |
| stopwatch_duration_msecs(&sw)); |
| } |
| |
| void mainboard_silicon_init_params(FSP_SIL_UPD *params) |
| { |
| const struct pad_config *pads; |
| size_t num; |
| static const long display_timeout_ms = 3000; |
| |
| /* This is reconfigured back to whatever FSP-S expects by |
| gpio_configure_pads. */ |
| gpio_input(GPIO_HDMI_HPD); |
| if (display_init_required() && !gpio_get(GPIO_HDMI_HPD)) { |
| /* This has to be done before FSP-S runs. */ |
| if (google_chromeec_wait_for_displayport(display_timeout_ms)) |
| wait_for_hpd(GPIO_DP_HPD, display_timeout_ms); |
| } |
| |
| pads = variant_gpio_table(&num); |
| gpio_configure_pads(pads, num); |
| } |