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| author | Cliff Huang <cliff.huang@intel.corp-partner.google.com> | 2022-03-10 14:27:01 -0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-03-18 15:39:33 +0000 |
| commit | 2b19d547c0866fef84bdb7b226ce7a4ac81af64f (patch) | |
| tree | 8eb22095bf09e30f4f199d5996b2d2bb14c83656 /src/mainboard/intel/adlrvp/devicetree.cb | |
| parent | 8d296b1eba3323ac5ece086913c7b94c9d4f7b71 (diff) | |
| download | coreboot-2b19d547c0866fef84bdb7b226ce7a4ac81af64f.tar.gz coreboot-2b19d547c0866fef84bdb7b226ce7a4ac81af64f.tar.bz2 coreboot-2b19d547c0866fef84bdb7b226ce7a4ac81af64f.zip | |
mb/intel/adlrvp: Set EPP to 45% for all Adl RVP variants
This sets EPP value to be 45% for all Adl RVP variants.
Historically, EPP Ratio has always been 50% (128) on Chrome platforms.
But on Intel Alderlake EPP ratio of 45% is recommended for optimal
power and performance on Chrome platforms.
TEST=
Use 'iotools rdmsr [cpu id] 0x774' command and check field 32:24 = 0x73.
Signed-off-by: Cliff Huang <cliff.huang@intel.corp-partner.google.com>
Change-Id: If83a2148d596efccd2e50cc82f1afcbfb9ebb935
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62744
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>
Diffstat (limited to 'src/mainboard/intel/adlrvp/devicetree.cb')
| -rw-r--r-- | src/mainboard/intel/adlrvp/devicetree.cb | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/intel/adlrvp/devicetree.cb b/src/mainboard/intel/adlrvp/devicetree.cb index a4f85947a9c9..8847d88f931e 100644 --- a/src/mainboard/intel/adlrvp/devicetree.cb +++ b/src/mainboard/intel/adlrvp/devicetree.cb @@ -168,6 +168,10 @@ chip soc/intel/alderlake register "cnvi_bt_audio_offload" = "true" + # set EPP to 45%: 45 * 256/100 = 115 = 0x73 + register "enable_energy_perf_pref" = "true" + register "energy_perf_pref_value" = "0x73" + # Intel Common SoC Config register "common_soc_config" = "{ .i2c[0] = { |