[S] Change in coreboot[master]: mb/google/guybrush: enable display backlight in ramstage

[Raul Rangel (Code Review)]

Attention is currently required from: Jason Nien, Matt DeVillier, Rob Barnes, Karthik Ramasubramanian.

Raul Rangel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/67246 )

Change subject: mb/google/guybrush: enable display backlight in ramstage
......................................................................

Patch Set 1:

(1 comment)

File src/mainboard/google/guybrush/variants/baseboard/gpio.c:

https://review.coreboot.org/c/coreboot/+/67246/comment/4ae54d28_93e395f8 
PS1, Line 141: PAD_GPO
> looking at the original bug, it seemed that some SKUs were having issues with the backlight being re […]

Yeah, this GPIO wouldn't control the min value, it would just make the screen black. I'm not sure if the SMU restores this GPIO on S0i3 resume. Can you try removing the extra ACPI code?