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/*
* 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
};
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