[XS] Change in coreboot[main]: mb/google/fatcat: Disable package c-state auto-demotion

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/84956?usp=email )

Change subject: mb/google/fatcat: Disable package c-state auto-demotion
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mb/google/fatcat: Disable package c-state auto-demotion

Package C-state auto demotion feature allows hardware to determine lower
C-state as per platform policy. Since platform sets performance policy
to balanced from hardware, auto demotion can be disabled without
performance impact.

TEST=Build fatcat and check the platform boots without an issue.

Change-Id: I01f2cb8ac1093ae98cc076e35ad1924baa53aa59
Signed-off-by: Sukumar Ghorai 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84956
Tested-by: build bot (Jenkins) 
Reviewed-by: Jamie Ryu 
Reviewed-by: Subrata Banik 
---
M src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb
1 file changed, 2 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Jamie Ryu: Looks good to me, approved
  Subrata Banik: Looks good to me, approved

diff --git a/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb b/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb
index 1b1fc73..a81f35e 100644
--- a/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb
+++ b/src/mainboard/google/fatcat/variants/baseboard/fatcat/devicetree.cb
@@ -39,6 +39,8 @@
    # TODO: Safe Setting. Needs to be removed later
    # Disable C1 C-state auto-demotion
    register "disable_c1_state_auto_demotion" = "true"
+	# Disable PKGC-state auto-demotion
+	register "disable_package_c_state_demotion" = "true"

# Enable CNVi BT
    register "cnvi_bt_core" = "true"