[coreboot-gerrit] Change in coreboot[master]: soc/{apl,glk}: set GPU based on CONFIG_ONBOARD_VGA_IS_PRIMARY

[Maxim Polyakov (Code Review)]

Maxim Polyakov has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/39374 )

Change subject: soc/{apl,glk}: set GPU based on CONFIG_ONBOARD_VGA_IS_PRIMARY
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Patch Set 22:

(1 comment)

https://review.coreboot.org/c/coreboot/+/39374/17/src/soc/intel/apollolake/c... 
File src/soc/intel/apollolake/chip.h:

https://review.coreboot.org/c/coreboot/+/39374/17/src/soc/intel/apollolake/c... 
PS17, Line 45: PRIMARY_AUTO = 0,
             : 	PRIMARY_IGD  = 2,
             : 	PRIMARY_PCI  = 3,
> Uhm, this isn't solved, though. […]

This works the same as for Skylake. If the option is set to PRIMARY_IGD, then Linux output video to the monitor that is connected to the port from IGD. But if you set it to PRIMARY_PCI, then the video will be output to the monitor connected to the external GPU.

I connect an external GPU to miniPCIe and tested it.