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mb/google/brya: Disable the Package C-state demotion 

Disabling the Package C-state demotion feature for brya baseboard
as a work around to the S0ix issue and also this doesn't have any
impact on the power and performance measured and verified by the
PNP team.

This feature will be enabled after its functionality is verified with no
issues and also based on its impact on PNP.

BUG=none
BRANCH=firmware-brya-14505.B
TEST=Boot and verified that S0ix issue is resolved.

Signed-off-by: Zhixing Ma <zhixing.ma@intel.com>
Change-Id: Id3941c8870d41b25488c8ac5d38534fa94664d4a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65805
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
This commit is contained in:
Zhixing Ma 2022-07-12 17:43:21 -07:00 committed by Nick Vaccaro
parent 239b5df268
commit a47a490635
1 changed files with 4 additions and 0 deletions
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4
src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb
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@ -75,6 +75,10 @@ chip soc/intel/alderlake
# Disable C state auto-demotion for all brya baseboards # Disable C state auto-demotion for all brya baseboards
register "disable_c1_state_auto_demotion" = "1" register "disable_c1_state_auto_demotion" = "1"
# FIXME: To be enabled in future based on PNP impact data.
# Disable Package C-state demotion for brya baseboard.
register "disable_package_c_state_demotion" = "1"
# Intel Common SoC Config # Intel Common SoC Config
#+-------------------+---------------------------+ #+-------------------+---------------------------+
#| Field | Value | #| Field | Value |