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mb/lenovo/t440p: Enable PCI 00:01.1 bridge for dGPU 

An optional dGPU can be connected to the second PEG bridge:

  -[0000:00]-+-00.0  Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller
             +-01.0-[01]--
             +-01.1-[02]----00.0  NVIDIA Corporation GK208M [GeForce GT 730M]

It's possible that the 01.0 bridge is never populated, but we have to
leave it on anyway so 01.1 can be enumerated.

Change-Id: Ieab7a7bf3b31b4ee9d9f12b5d827d866c87356e1
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Nico Huber 2022-10-04 12:42:36 +02:00 committed by Martin Roth
parent 0e8e7467a4
commit e8930e560f
1 changed files with 2 additions and 2 deletions
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src/mainboard/lenovo/haswell/variants/t440p/devicetree.cb
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@ -23,8 +23,8 @@ chip northbridge/intel/haswell
subsystemid 0x17aa 0x220e inherit
device pci 00.0 on end # Host bridge
device pci 01.0 on end # PCIe Bridge for discrete graphics
device pci 01.1 off end # Unused PCIe Bridge
device pci 01.0 on end # PCIe Bridge for discrete graphics (optional)
device pci 01.1 on end # PCIe Bridge for discrete graphics (optional)
device pci 02.0 on end # Internal graphics VGA controller
device pci 03.0 on end # Mini-HD audio