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/*
* This file is part of the coreboot project.
*
* 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 <ec/lenovo/pmh7/pmh7.h>
#include <console/console.h>
#include "hybrid_graphics.h"
#include "chip.h"
/*
* Returns the hybrid graphics presence and user's card preferences.
*/
void early_hybrid_graphics(bool *enable_igd, bool *enable_peg)
{
const struct drivers_lenovo_hybrid_graphics_config *config;
const struct device *dev;
enum hybrid_graphics_req mode = HYBRID_GRAPHICS_DEFAULT_GPU;
/* TODO: Use generic device instead of dummy PNP device */
dev = dev_find_slot_pnp(HYBRID_GRAPHICS_PORT, HYBRID_GRAPHICS_DEVICE);
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "Hybrid graphics: ERROR\n");
*enable_igd = true;
*enable_peg = false;
return;
}
config = dev->chip_info;
if (get_gpio(config->detect_gpio) == DGPU_NOT_INSTALLED) {
printk(BIOS_DEBUG, "Hybrid graphics:"
" No discrete GPU present.\n");
*enable_igd = true;
*enable_peg = false;
return;
}
get_option(&mode, "hybrid_graphics_mode");
if (mode == HYBRID_GRAPHICS_DISCRETE) {
printk(BIOS_DEBUG, "Hybrid graphics:"
" Disabling integrated GPU.\n");
*enable_igd = false;
*enable_peg = true;
} else if (mode == HYBRID_GRAPHICS_INTEGRATED) {
printk(BIOS_DEBUG, "Hybrid graphics:"
" Disabling discrete GPU.\n");
*enable_igd = true;
*enable_peg = false;
} else {
printk(BIOS_DEBUG, "Hybrid graphics:"
" Activating Switchable (both GPUs).\n");
*enable_igd = true;
*enable_peg = true;
}
/*
* Need to do power handling here as we know there's a dGPU.
* Support GPIO and Thinker1.
*/
if (config->has_dgpu_power_gpio) {
if (*enable_peg)
set_gpio(config->dgpu_power_gpio,
!config->dgpu_power_off_lvl);
else
set_gpio(config->dgpu_power_gpio,
config->dgpu_power_off_lvl);
} else if (config->has_thinker1) {
bool power_en = pmh7_dgpu_power_state();
if (*enable_peg != power_en)
pmh7_dgpu_power_enable(!power_en);
} else {
printk(BIOS_ERR, "Hybrid graphics:"
" FIXME: dGPU power handling not implemented\n");
}
}
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