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

[Maxim Polyakov (Code Review)]

Hello  Felix Singer, build bot (Jenkins), Paul Menzel, Angel Pons, 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 (#27).

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

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, it shows the Tianocore logo/setup menu and the desktop on
the display.

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

Change-Id: Idcd117217cf412ee0722aff52db4b3c8ec2a226c
Signed-off-by: Maxim Polyakov 
---
M src/soc/intel/apollolake/chip.h
M src/soc/intel/apollolake/romstage.c
2 files changed, 16 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/39374/27