tree 24aa1fe74673963ab7022fab81c04f3a4f7ee79a
parent 1b25422215279191da7f71840da7214fbcb22b9c
author Subrata Banik <subratabanik@google.com> 1686573453 +0530
committer Subrata Banik <subratabanik@google.com> 1693469811 +0000

mb/google/rex: Enable Fast V-Mode for MTL-U 15W

This patch sets the Fast V-Mode (FVM) configuration parameter as
suggested in Intel doc 640982. As per the doc, Intel MTL-U 15W CPU
supports FVM on IA 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 the 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 ITRIP for IA is 66A and 21A for SA.

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

Change-Id: Ia7157bddf2e9586e4a91cc55e48693561072cd05
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75763
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>