diff options
author | Arthur Heymans <arthur@aheymans.xyz> | 2017-01-02 16:16:45 +0100 |
---|---|---|
committer | Alexander Couzens <lynxis@fe80.eu> | 2017-02-19 19:15:40 +0100 |
commit | f9d5308690e96002dbeab77b78e499dcd2d3a42f (patch) | |
tree | deab6f631bc590927ca65fbb9a13f9f3da3f1bf7 /src/mainboard/lenovo/t400/hybrid_graphics.c | |
parent | 3fee215a3e0ee121f5764a4e9fe194b249e42009 (diff) | |
download | coreboot-f9d5308690e96002dbeab77b78e499dcd2d3a42f.tar.xz |
mb/lenovo/t400: Implement hybrid graphic in romstage
The hybrid driver select by DRIVERS_LENOVO_HYBRID_GRAPHICS doesn't work
for t400/t500.
Replace it with a custom romstage implementation.
Tested on Lenovo T500 with dual graphics:
* Intel Native GFX init
* AMD VBios
* GNU Linux 4.8.13
* SeaBios as payload
* Discrete is working (44 W)
* Integrated is working (24 W)
* Switchable is working (34 W)
** Both GPUs are enabled, with Intel being connected to the panel
** DRI_PRIME allows to use AMD GPU
** ACPI doesn't seem to work (no vgaswitcheroo)
Depends on Change-Id: I4dc00005270240c048272b2e4f52ae46ba1c9422
Depends on Change-Id: If389016f3bb0c4c2fd0b826914997a87a9137201
Change-Id: I7496876e9b434d4a2388e1ede27ac604670339b7
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/18010
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Diffstat (limited to 'src/mainboard/lenovo/t400/hybrid_graphics.c')
-rw-r--r-- | src/mainboard/lenovo/t400/hybrid_graphics.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t400/hybrid_graphics.c b/src/mainboard/lenovo/t400/hybrid_graphics.c new file mode 100644 index 0000000000..b313ffa49c --- /dev/null +++ b/src/mainboard/lenovo/t400/hybrid_graphics.c @@ -0,0 +1,91 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 secunet Security Networks AG + * + * 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 <stdint.h> +#include <string.h> +#include <southbridge/intel/common/gpio.h> +#include <northbridge/intel/gm45/gm45.h> +#include <console/console.h> +#include <option.h> + +#define HYBRID_GRAPHICS_INTEGRATED_ONLY 0 +#define HYBRID_GRAPHICS_DISCRETE_ONLY 1 +#define HYBRID_GRAPHICS_SWITCHABLE 2 + +#define MUX_GPIO 22 +#define BCL_CTL_GPIO 19 +#define GFX_PWR_EN_GPIO 49 + +#define HYBRID_DETECT_GPIO 21 + +void hybrid_graphics_init(sysinfo_t *sysinfo); + +static bool hybrid_graphics_installed(void) +{ + if (get_gpio(HYBRID_DETECT_GPIO)) + return false; + else + return true; +} + +void hybrid_graphics_init(sysinfo_t *sysinfo) +{ + /* Set default mode */ + uint8_t hybrid_graphics_mode = + HYBRID_GRAPHICS_INTEGRATED_ONLY; + + if (!hybrid_graphics_installed()) { + printk(BIOS_DEBUG, "Hybrid graphics not installed.\n"); + /* The display is not connected to a mux or switchable. */ + sysinfo->enable_igd = 1; + sysinfo->enable_peg = 0; + return; + } + + printk(BIOS_DEBUG, "Hybrid graphics available: "); + get_option(&hybrid_graphics_mode, "hybrid_graphics_mode"); + + /* Select appropriate hybrid graphics device */ + switch (hybrid_graphics_mode) { + default: + case HYBRID_GRAPHICS_INTEGRATED_ONLY: + printk(BIOS_DEBUG, "Activating Integrated Only.\n"); + set_gpio(MUX_GPIO, GPIO_LEVEL_LOW); + set_gpio(BCL_CTL_GPIO, GPIO_LEVEL_LOW); + set_gpio(GFX_PWR_EN_GPIO, GPIO_LEVEL_LOW); + + sysinfo->enable_igd = 1; + sysinfo->enable_peg = 0; + break; + case HYBRID_GRAPHICS_DISCRETE_ONLY: + printk(BIOS_DEBUG, "Activating Discrete Only.\n"); + set_gpio(MUX_GPIO, GPIO_LEVEL_HIGH); + set_gpio(BCL_CTL_GPIO, GPIO_LEVEL_HIGH); + set_gpio(GFX_PWR_EN_GPIO, GPIO_LEVEL_HIGH); + + sysinfo->enable_igd = 0; + sysinfo->enable_peg = 1; + break; + case HYBRID_GRAPHICS_SWITCHABLE: + printk(BIOS_DEBUG, "Activating Switchable (both GPUs).\n"); + set_gpio(MUX_GPIO, GPIO_LEVEL_LOW); + set_gpio(BCL_CTL_GPIO, GPIO_LEVEL_LOW); + set_gpio(GFX_PWR_EN_GPIO, GPIO_LEVEL_HIGH); + + sysinfo->enable_igd = 1; + sysinfo->enable_peg = 1; + break; + } +} |