[S] Change in coreboot[master]: mb/google/rex: Enable Fast V-Mode for MTL-U 28W

[Subrata Banik (Code Review)]

Attention is currently required from: Eric Herrmann, Jakub Czapiga, Jérémy Compostella, Kapil Porwal, Subrata Banik, Tarun Tuli.

Hello Jakub Czapiga, Jérémy Compostella, Kapil Porwal, Tarun Tuli, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/75764?usp=email

to look at the new patch set (#5).

Change subject: mb/google/rex: Enable Fast V-Mode for MTL-U 28W
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mb/google/rex: Enable Fast V-Mode for MTL-U 28W

This patch sets the FVM configuration parameter as suggested in Intel
doc 640982. As per the doc, Intel MTL-P 28W CPU supports FVM on IA, GT
and SA.

Fast V-Mode (FVM): Intel Meteor Lake introduces the ability to manage
the peak power events it calls "reactive peak power management".

The Fast V-Mode is one such technique to perform reactive peak power
management. It relies on the detector integrated inside the processor
which senses when the processor load current exceeds a present threshold
by monitoring the processor power domain IMVP (Intel Mobile Voltage
Positioning) VR sense point.

The baseline Icc max for IA is 91A, 53A for GT and 35A for SA.

BUG=b:286809233
TEST=Able to build and boot google/rex without seeing any performance
regression.

Change-Id: If834c1af8141a19fd2daae653579225b77cfa6c8
Signed-off-by: Subrata Banik 
---
M src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb
1 file changed, 15 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/64/75764/5