Change in coreboot[master]: mb/lenovo: Dual Graphics for xx20/xx30 ThinkPads

[Patrick Rudolph (Code Review)]

Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/28393 )

Change subject: mb/lenovo: Dual Graphics for xx20/xx30 ThinkPads
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Patch Set 1:

(1 comment)

https://review.coreboot.org/#/c/28393/1/src/mainboard/lenovo/t430s/romstage....
File src/mainboard/lenovo/t430s/romstage.c:

https://review.coreboot.org/#/c/28393/1/src/mainboard/lenovo/t430s/romstage....
PS1, Line 76: power_en
That will not power the dGPU if mode == dual graphics. PMH7 registers aren't cleared on reboot, only on battery and ext power failure. The hybrid graphics driver does it right.
Also not hiding PEG10 will draw +1Watt even with disabled dGPU.