[L] Change in coreboot[master]: Reland drivers/intel/dptf: Add multiple fan support under dptf

[Sumeet R Pawnikar (Code Review)]

Attention is currently required from: Lance Zhao, Subrata Banik, Caveh Jalali, Tim Wawrzynczak, Sumeet R Pawnikar, Boris Mittelberg.

Hello Lance Zhao, build bot (Jenkins), Subrata Banik, Caveh Jalali, Reka Norman, Tim Wawrzynczak, Boris Mittelberg,

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

https://review.coreboot.org/c/coreboot/+/73249

to look at the new patch set (#2).

Change subject: Reland drivers/intel/dptf: Add multiple fan support under dptf
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Reland drivers/intel/dptf: Add multiple fan support under dptf

This reverts commit 4dba71fd25c91a9e610287c61238a8fe24452e4e.

Add multiple fan support for dptf policies.

This also fixes the Gmeet resolution drop issue as per b:246535768
comment#12. When system starts Gmeet video call, it uses the hardware
accelerated encoder as per the expectation. But, as soon as another
system connects to the call, the immediate fallback observed from
hardware to software encoder. Due to this, Gmeet resolution dropped
from 720p to 180p. This issue observed on AlderLake-N SoC based fanless
platforms. This same issue was not seen on fan based systems.
With the fix in dptf driver where fan configures appropriate setting
for only fan participant, able to see consistent 720p resolution.

BUG=b:246535768,b:235254828
BRANCH=None
TEST=Built and tested on Alderlake-P Redrix system for two fans
support and on Alderlake-N fanless systems. With this code change
Gmeet resolution drop not observed.

Signed-off-by: Sumeet Pawnikar 
Change-Id: Id07d279ff962253c22be9d395ed7be0d732aeaa7
---
M src/acpi/acpigen_dptf.c
M src/drivers/intel/dptf/chip.h
M src/drivers/intel/dptf/dptf.c
M src/ec/google/chromeec/acpi/emem.asl
M src/ec/google/chromeec/chip.h
M src/ec/google/chromeec/ec_acpi.c
M src/ec/google/chromeec/ec_dptf_helpers.c
M src/ec/google/common/dptf.h
M src/include/acpi/acpigen_dptf.h
9 files changed, 238 insertions(+), 47 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/73249/2