| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org> |
| * |
| * 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 <types.h> |
| #include <option.h> |
| #include <device/device.h> |
| |
| #include <southbridge/intel/common/gpio.h> |
| #include <console/console.h> |
| #include "chip.h" |
| |
| /* |
| * Switch panel mux or backlight mux to active GPU. |
| * In case both GPUs are active switch panel mux to integrated. |
| */ |
| static void lenovo_hybrid_graphics_enable(struct device *dev) |
| { |
| const struct drivers_lenovo_hybrid_graphics_config *config; |
| enum hybrid_graphics_req mode = HYBRID_GRAPHICS_DEFAULT_GPU; |
| |
| /* Don't confuse anyone else and disable the fake device */ |
| dev->enabled = 0; |
| |
| config = dev->chip_info; |
| if (!config || (get_gpio(config->detect_gpio) == DGPU_NOT_INSTALLED)) { |
| printk(BIOS_DEBUG, "Hybrid graphics: Not installed\n"); |
| return; |
| } |
| |
| get_option(&mode, "hybrid_graphics_mode"); |
| |
| if (mode == HYBRID_GRAPHICS_DISCRETE) { |
| printk(BIOS_DEBUG, "Hybrid graphics:" |
| " Switching panel to discrete GPU.\n"); |
| |
| if (config->has_panel_hybrid_gpio) |
| set_gpio(config->panel_hybrid_gpio, |
| !config->panel_integrated_lvl); |
| |
| if (config->has_backlight_gpio) |
| set_gpio(config->backlight_gpio, |
| !config->backlight_integrated_lvl); |
| } else { |
| printk(BIOS_DEBUG, "Hybrid graphics:" |
| " Switching panel to integrated GPU.\n"); |
| |
| if (config->has_panel_hybrid_gpio) |
| set_gpio(config->panel_hybrid_gpio, |
| config->panel_integrated_lvl); |
| |
| if (config->has_backlight_gpio) |
| set_gpio(config->backlight_gpio, |
| config->backlight_integrated_lvl); |
| } |
| } |
| |
| struct chip_operations drivers_lenovo_hybrid_graphics_ops = { |
| CHIP_NAME("Lenovo hybrid graphics driver") |
| .enable_dev = lenovo_hybrid_graphics_enable |
| }; |