diff options
Diffstat (limited to 'src/drivers/lenovo/hybrid_graphics/romstage.c')
-rw-r--r-- | src/drivers/lenovo/hybrid_graphics/romstage.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/drivers/lenovo/hybrid_graphics/romstage.c b/src/drivers/lenovo/hybrid_graphics/romstage.c new file mode 100644 index 0000000000..9009c5841a --- /dev/null +++ b/src/drivers/lenovo/hybrid_graphics/romstage.c @@ -0,0 +1,95 @@ +/* + * 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 <ec/lenovo/pmh7/pmh7.h> +#include <console/console.h> +#include <delay.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 to + * turn off. Support GPIO and Thinker1. + */ + if (!*enable_peg) { + if (config->has_dgpu_power_gpio) { + set_gpio(config->dgpu_power_gpio, + config->dgpu_power_off_lvl); + } else if (config->has_thinker1) { + pmh7_register_clear_bit(0x50, 7); // DGPU_RST + udelay(100); + pmh7_register_clear_bit(0x50, 3); // DGPU_PWR + } else { + printk(BIOS_ERR, "Hybrid graphics:" + " FIXME: dGPU power not disabled !\n"); + } + } +} |