From fe97c77cab5f91bef5890257e56a63f8aa027cd8 Mon Sep 17 00:00:00 2001 From: Sean Rhodes Date: Thu, 26 May 2022 22:25:03 +0100 Subject: mb/starlabs/lite: Enable enhanced C-states Tested on the StarLite Mk III & Mk IV with Zorin 16.2 Core. This resulted in a reduction in power consumption of approximately 3%. Signed-off-by: Sean Rhodes Change-Id: I7b5f4e01bc786db02184b722c74fda7d0ca055be Reviewed-on: https://review.coreboot.org/c/coreboot/+/64709 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons --- src/mainboard/starlabs/lite/variants/glk/devicetree.cb | 2 ++ src/mainboard/starlabs/lite/variants/glkr/devicetree.cb | 2 ++ 2 files changed, 4 insertions(+) diff --git a/src/mainboard/starlabs/lite/variants/glk/devicetree.cb b/src/mainboard/starlabs/lite/variants/glk/devicetree.cb index e44896f386..bc878ef796 100644 --- a/src/mainboard/starlabs/lite/variants/glk/devicetree.cb +++ b/src/mainboard/starlabs/lite/variants/glk/devicetree.cb @@ -25,6 +25,8 @@ chip soc/intel/apollolake register "hdaudio_pwr_gate_enable" = "1" register "hdaudio_bios_config_lockdown" = "1" + register "enhanced_cstates" = "1" + register "pnp_settings" = "PNP_PERF_POWER" register "ModPhyIfValue" = "0x12" diff --git a/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb b/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb index 5cfcb4033d..ca6ce1c6ad 100644 --- a/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb +++ b/src/mainboard/starlabs/lite/variants/glkr/devicetree.cb @@ -25,6 +25,8 @@ chip soc/intel/apollolake register "hdaudio_pwr_gate_enable" = "1" register "hdaudio_bios_config_lockdown" = "1" + register "enhanced_cstates" = "1" + register "pnp_settings" = "PNP_PERF_POWER" register "ModPhyIfValue" = "0x12" -- cgit v1.2.3