[coreboot-gerrit] Change in coreboot[master]: soc/{apl,glk}: Allow to select the primary graphics device

[Maxim Polyakov (Code Review)]

Attention is currently required from: Nico Huber, Maxim Polyakov, Mario Scheithauer, Angel Pons.
Hello  Felix Singer, build bot (Jenkins), Nico Huber, Paul Menzel, Mario Scheithauer, Angel Pons, Werner Zeh, Andrey Petrov, Patrick Rudolph,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/39374

to look at the new patch set (#32).

Change subject: soc/{apl,glk}: Allow to select the primary graphics device
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soc/{apl,glk}: Allow to select the primary graphics device

Allow to select the primary graphics device between the IGD and the
external PCIe GPU depending on the ONBOARD_VGA_IS_PRIMARY config.
The option sets the priority only. This means that if a high priority
is set for an external PCI device and it is not connected/not enabled,
then the device with a lower priority will be used, in our case it is
IGD.

TEST = Set PRIMARY_PCI and boot Linux on the Kontron mAL10 [1] with
the miniPCIe video adapter on the Silicon Motion SM750 controller. As
a result, the display connected to an external GPU device shows the
Tianocore logo + setup menu and the desktop.

[1] https://review.coreboot.org/c/coreboot/+/39133

Change-Id: Idcd117217cf412ee0722aff52db4b3c8ec2a226c
Signed-off-by: Maxim Polyakov 
---
M src/soc/intel/apollolake/romstage.c
1 file changed, 14 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/39374/32