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Patches for the Librem Mini (v1/v2) and Librem 14 upstreamed post-4.14. Fixes some issues with acoustic noise and headphone jack detection. Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
41 lines
1.5 KiB
Diff
41 lines
1.5 KiB
Diff
From 8fed12fb31b9437934525a0389e5b4a45be56bd2 Mon Sep 17 00:00:00 2001
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From: Matt DeVillier <matt.devillier@puri.sm>
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Date: Tue, 15 Jun 2021 10:50:17 -0500
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Subject: [PATCH 2/4] mb/purism/librem_mini: Enable acoustic noise mitigation
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Enable FastPkgCRampDisable for all domains, set SlowSlewRate
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to fast/16 for all domains.
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Test: boot Librem Mini v2, observe high frequency acoustic noise reduced.
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Change-Id: I10bc2a3e6b631b8c0b430e204f376aa9a81ac683
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Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
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---
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.../librem_cnl/variants/librem_mini/devicetree.cb | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/src/mainboard/purism/librem_cnl/variants/librem_mini/devicetree.cb b/src/mainboard/purism/librem_cnl/variants/librem_mini/devicetree.cb
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index 69d1b423bd..836f4aceaf 100644
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--- a/src/mainboard/purism/librem_cnl/variants/librem_mini/devicetree.cb
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+++ b/src/mainboard/purism/librem_cnl/variants/librem_mini/devicetree.cb
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@@ -22,6 +22,16 @@ chip soc/intel/cannonlake
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# Misc
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register "AcousticNoiseMitigation" = "1"
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+ register "FastPkgCRampDisableIa" = "1"
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+ register "FastPkgCRampDisableGt" = "1"
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+ register "FastPkgCRampDisableSa" = "1"
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+ register "FastPkgCRampDisableFivr" = "1"
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+
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+ register "SlowSlewRateForIa" = "3" # fast/16
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+ register "SlowSlewRateForGt" = "3" # fast/16
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+ register "SlowSlewRateForSa" = "3" # fast/16
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+ register "SlowSlewRateForFivr" = "3" # fast/16
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+
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# Power
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register "PchPmSlpS3MinAssert" = "3" # 50ms
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register "PchPmSlpS4MinAssert" = "1" # 1s
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--
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2.30.2
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