| Patrick Rudolph | d7dcc44 | 2017-07-25 17:40:36 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <types.h> |
| 17 | #include <option.h> |
| 18 | #include <device/device.h> |
| 19 | |
| 20 | #include <southbridge/intel/common/gpio.h> |
| 21 | #include <ec/lenovo/pmh7/pmh7.h> |
| 22 | #include <console/console.h> |
| 23 | #include <delay.h> |
| 24 | |
| 25 | #include "hybrid_graphics.h" |
| 26 | #include "chip.h" |
| 27 | |
| 28 | /* |
| 29 | * Returns the hybrid graphics presence and user's card preferences. |
| 30 | */ |
| 31 | void early_hybrid_graphics(bool *enable_igd, bool *enable_peg) |
| 32 | { |
| 33 | const struct drivers_lenovo_hybrid_graphics_config *config; |
| 34 | const struct device *dev; |
| 35 | enum hybrid_graphics_req mode = HYBRID_GRAPHICS_DEFAULT_GPU; |
| 36 | |
| 37 | /* TODO: Use generic device instead of dummy PNP device */ |
| 38 | dev = dev_find_slot_pnp(HYBRID_GRAPHICS_PORT, HYBRID_GRAPHICS_DEVICE); |
| 39 | |
| 40 | if (!dev || !dev->chip_info) { |
| 41 | printk(BIOS_ERR, "Hybrid graphics: ERROR\n"); |
| 42 | *enable_igd = true; |
| 43 | *enable_peg = false; |
| 44 | return; |
| 45 | } |
| 46 | |
| 47 | config = dev->chip_info; |
| 48 | if (get_gpio(config->detect_gpio) == DGPU_NOT_INSTALLED) { |
| 49 | printk(BIOS_DEBUG, "Hybrid graphics:" |
| 50 | " No discrete GPU present.\n"); |
| 51 | *enable_igd = true; |
| 52 | *enable_peg = false; |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | get_option(&mode, "hybrid_graphics_mode"); |
| 57 | |
| 58 | if (mode == HYBRID_GRAPHICS_DISCRETE) { |
| 59 | printk(BIOS_DEBUG, "Hybrid graphics:" |
| 60 | " Disabling integrated GPU.\n"); |
| 61 | |
| 62 | *enable_igd = false; |
| 63 | *enable_peg = true; |
| 64 | } else if (mode == HYBRID_GRAPHICS_INTEGRATED) { |
| 65 | printk(BIOS_DEBUG, "Hybrid graphics:" |
| 66 | " Disabling discrete GPU.\n"); |
| 67 | |
| 68 | *enable_igd = true; |
| 69 | *enable_peg = false; |
| 70 | } else { |
| 71 | printk(BIOS_DEBUG, "Hybrid graphics:" |
| 72 | " Activating Switchable (both GPUs).\n"); |
| 73 | |
| 74 | *enable_igd = true; |
| 75 | *enable_peg = true; |
| 76 | } |
| 77 | |
| 78 | /* |
| 79 | * Need to do power handling here as we know there's a dGPU to |
| 80 | * turn off. Support GPIO and Thinker1. |
| 81 | */ |
| 82 | if (!*enable_peg) { |
| 83 | if (config->has_dgpu_power_gpio) { |
| 84 | set_gpio(config->dgpu_power_gpio, |
| 85 | config->dgpu_power_off_lvl); |
| 86 | } else if (config->has_thinker1) { |
| 87 | pmh7_register_clear_bit(0x50, 7); // DGPU_RST |
| 88 | udelay(100); |
| 89 | pmh7_register_clear_bit(0x50, 3); // DGPU_PWR |
| 90 | } else { |
| 91 | printk(BIOS_ERR, "Hybrid graphics:" |
| 92 | " FIXME: dGPU power not disabled !\n"); |
| 93 | } |
| 94 | } |
| 95 | } |