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| author | Chris Wang <chriswang@ami.corp-partner.google.com> | 2017-11-24 13:43:50 +0800 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2017-11-28 19:10:55 +0000 |
| commit | 51de1802f34c73710df9115557c5c13524e8608c (patch) | |
| tree | 70c5360c6010673eb8c3dc12ff24a054cea32751 /src/mainboard/google | |
| parent | 3b62d6b40a12ed1a882266ea725471ee0edc437c (diff) | |
| download | coreboot-51de1802f34c73710df9115557c5c13524e8608c.tar.xz | |
mb/google/poppy/variants/nautilus: Change IA/GT/SA slow slew rate settings
Change IA/GT/SA slow slew rate settings.
System's audible noise will be reduced with them.
- Slow slew rate for IA/GT/SA : fast/16
- Fast PKG C-state ramp for IA/GT/SA: disabled
BRANCH=master
BUG=none
TEST=compiled/verified
Change-Id: Ibf11aba7bafb3b02c510905d7d904507eee6394b
Signed-off-by: Chris Wang <chriswang@ami.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/22588
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: shkim <sh_.kim@samsung.com>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/poppy/variants/nautilus/devicetree.cb | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb index efaea3fc57..6ee7a52f80 100644 --- a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb +++ b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb @@ -70,6 +70,14 @@ chip soc/intel/skylake register "pirqg_routing" = "PCH_IRQ11" register "pirqh_routing" = "PCH_IRQ11" + # VR Slew rate setting for improving audible noise + register "AcousticNoiseMitigation" = "1" + register "FastPkgCRampDisableIa" = "1" + register "FastPkgCRampDisableGt" = "1" + register "FastPkgCRampDisableSa" = "1" + register "SlowSlewRateForIa" = "3" # Fast/16 + register "SlowSlewRateForGt" = "3" # Fast/16 + register "SlowSlewRateForSa" = "3" # Fast/16 # VR Settings Configuration for 4 Domains #+----------------+-------+-------+-------+-------+ #| Domain/Setting | SA | IA | GTUS | GTS | |