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| author | Evgeny Zinoviev <me@ch1p.com> | 2018-08-30 02:18:48 +0300 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-09-05 10:04:20 +0000 |
| commit | 384e9aed8c477922c960e2cbd429bd3a15b371de (patch) | |
| tree | fd46db5b106df1a26c6e6fd5e93d1e1569924733 /src/mainboard/lenovo/t420 | |
| parent | ce1af8b0bf8569ad2d0ebc7bc7b0babe1579c7f2 (diff) | |
| download | coreboot-384e9aed8c477922c960e2cbd429bd3a15b371de.tar.xz | |
mb/lenovo: Support dual graphics for xx20/xx30 ThinkPads
Add CMOS option that allows to use both integrated and discrete GPU.
Tested on ThinkPad W530.
Change-Id: I8842fef0fa1235eb91abf6b7e655ed4d8598adc7
Signed-off-by: Evgeny Zinoviev <me@ch1p.com>
Reviewed-on: https://review.coreboot.org/28393
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/lenovo/t420')
| -rw-r--r-- | src/mainboard/lenovo/t420/cmos.layout | 1 | ||||
| -rw-r--r-- | src/mainboard/lenovo/t420/romstage.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t420/cmos.layout b/src/mainboard/lenovo/t420/cmos.layout index 5a9e570c3f..f55c2037d5 100644 --- a/src/mainboard/lenovo/t420/cmos.layout +++ b/src/mainboard/lenovo/t420/cmos.layout @@ -129,6 +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 diff --git a/src/mainboard/lenovo/t420/romstage.c b/src/mainboard/lenovo/t420/romstage.c index 36e83a3c72..bef256200e 100644 --- a/src/mainboard/lenovo/t420/romstage.c +++ b/src/mainboard/lenovo/t420/romstage.c @@ -30,6 +30,9 @@ static void hybrid_graphics_init(void) early_hybrid_graphics(&igd, &peg); + if (peg && igd) + return; + /* Hide disabled devices */ reg32 = pci_read_config32(PCI_DEV(0, 0, 0), DEVEN); reg32 &= ~(DEVEN_PEG10 | DEVEN_IGD); |