From 28cdd4c8d36c49cbe9b171a2af6077fa8a253498 Mon Sep 17 00:00:00 2001 From: Nico Rikken Date: Sat, 5 May 2018 09:58:15 +0200 Subject: mb/lenovo/t520: Add Dual Graphics CMOS support Adds the CMOS option for Dual Graphics, as is present in more Lenovo models already. Enabling this option ensures that the NVIDIA GPU is powered. More PCI devices can be observed when activating this setting. It was verified on a W520, also by loading a VGA option ROM and achieving a working Dual Graphics system. The CMOS default has been kept to 'Integrated Only', as the usage of Dual Graphics requires an option ROM and drains the battery more quickly. Change-Id: I41ccabd4554ca019684edd6f8b1c23679212c59f Signed-off-by: Nico Rikken Reviewed-on: https://review.coreboot.org/26114 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph --- src/mainboard/lenovo/t520/cmos.layout | 2 ++ 1 file changed, 2 insertions(+) (limited to 'src/mainboard/lenovo/t520') diff --git a/src/mainboard/lenovo/t520/cmos.layout b/src/mainboard/lenovo/t520/cmos.layout index 3a82459ad5..7d2c821c05 100644 --- a/src/mainboard/lenovo/t520/cmos.layout +++ b/src/mainboard/lenovo/t520/cmos.layout @@ -3,6 +3,7 @@ ## ## Copyright (C) 2007-2008 coresystems GmbH ## Copyright (C) 2014 Vladimir Serbinenko +## Copyright (C) 2018 Nico Rikken ## ## 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 @@ -128,6 +129,7 @@ enumerations 11 6 224M 12 0 Integrated Only 12 1 Discrete Only +12 2 Dual Graphics 13 0 Disable 13 1 AC and battery 13 2 AC only -- cgit v1.2.3