[M] Change in coreboot[master]: soc/intel/meteorlake: Add provision to override the Fast Vmode

[Subrata Banik (Code Review)]

Attention is currently required from: Hannah Williams, Jay Patel, Jérémy Compostella, Kapil Porwal, Tarun Tuli, Wonkyu Kim.

Subrata Banik has uploaded a new patch set (#2) to the change originally created by Jay Patel. ( https://review.coreboot.org/c/coreboot/+/75566?usp=email )

The following approvals got outdated and were removed:
Code-Review-1 by Jay Patel

Change subject: soc/intel/meteorlake: Add provision to override the Fast Vmode
......................................................................

soc/intel/meteorlake: Add provision to override the Fast Vmode

This patch adds option to override Fast Vmode on Meteor Lake SoC.
This requires CepEnable, EnableFastVmode, IccLimit FSPM UPDs in FSP
header. If the hardware supports Fast Vmode, the FSPM will set the
ICC limit value to the value passed from coreboot.

If no value is passed by coreboot and FSPM will set it to default
value.

BUG=b:286809233
TEST=In debug MTL FSP logs, the value of FSP parameters is as passed
from coreboot including enable_fast_vmode, cep_enable, and
fast_vmode_i_trip. Also, fast_vmode_i_trip value is passed to
pcode using mailbox command without any error. This test done
on google/rex board.

Signed-off-by: Jay Patel 
Change-Id: Id05dccac56c504523f9327babe0c6fbeff488ec2
---
M src/soc/intel/meteorlake/chip.h
M src/soc/intel/meteorlake/romstage/fsp_params.c
2 files changed, 52 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/75566/2