From 54688b48d23ec6307740857ba46ce0cc109238f3 Mon Sep 17 00:00:00 2001 From: Jeremy Compostella Date: Thu, 21 Jul 2022 14:13:41 -0700 Subject: mb/google/brya: Use default EPP of 50% for skolas A power and performance analysis performed on Alder Lake demonstrated that with an EPP (Energy Performance Preference) at 50% along with EET (Energy Efficient Turbo) disabled, the overall SoC performance are similar or better and the SoC uses less power. For instance some browser benchmark results improved by 2% and some multi-core tests by 4% while at the same time power consumption lowered by approximately 7.6%. Similar results are observed on Raptor Lake. BRANCH=firmware-brya-14505.B BUG=b:240669428 TEST=verify that EPP is back to the by default 50% setting `iotools rdmsr 0 0x774' Signed-off-by: Jeremy Compostella Change-Id: I735ad9d88c7bf54def7a23b75abc4e89a213fb61 Reviewed-on: https://review.coreboot.org/c/coreboot/+/66282 Tested-by: build bot (Jenkins) Reviewed-by: Zhixing Ma Reviewed-by: Selma Bensaid Reviewed-by: Tim Wawrzynczak --- src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb | 4 ---- 1 file changed, 4 deletions(-) (limited to 'src') diff --git a/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb index 039ba4c2ce..c861c9b84c 100644 --- a/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb +++ b/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb @@ -126,10 +126,6 @@ chip soc/intel/alderlake }, }" - # set EPP to 45%: 45 * 256/100 = 115 = 0x73 - register "enable_energy_perf_pref" = "true" - register "energy_perf_pref_value" = "0x73" - device domain 0 on device ref igpu on end device ref dtt on end -- cgit v1.2.3