Patrick Georgi has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/35005 )
Change subject: mb/google/hatch: Add settings for noise mitgation ......................................................................
mb/google/hatch: Add settings for noise mitgation
Enable acoustic noise mitgation for hatch platform, the slow slew rates are fast time dived by 8 and disable Fast PKG C State Ramp(IA, GT, SA).
BUG=b:131779678 TEST=waveform test and reduce the noise level.
Signed-off-by: Dtrain Hsu dtrain_hsu@compal.corp-partner.google.com Change-Id: I49e834825b3f1e5bf02f9523d7caa93b544c9d17 Reviewed-on: https://review.coreboot.org/c/coreboot/+/35005 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Tim Wawrzynczak twawrzynczak@chromium.org --- M src/mainboard/google/hatch/variants/hatch/overridetree.cb 1 file changed, 9 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Tim Wawrzynczak: Looks good to me, approved
diff --git a/src/mainboard/google/hatch/variants/hatch/overridetree.cb b/src/mainboard/google/hatch/variants/hatch/overridetree.cb index 880d19f..6ed25c8 100644 --- a/src/mainboard/google/hatch/variants/hatch/overridetree.cb +++ b/src/mainboard/google/hatch/variants/hatch/overridetree.cb @@ -15,6 +15,15 @@ [PchSerialIoIndexUART2] = PchSerialIoDisabled, }"
+ # VR Slew rate setting + register "AcousticNoiseMitigation" = "1" + register "SlowSlewRateForIa" = "2" + register "SlowSlewRateForGt" = "2" + register "SlowSlewRateForSa" = "2" + register "FastPkgCRampDisableIa" = "1" + register "FastPkgCRampDisableGt" = "1" + register "FastPkgCRampDisableSa" = "1" + # Intel Common SoC Config #+-------------------+---------------------------+ #| Field | Value |