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mb/google/dedede: Enable "FastPkgCRampDisable" upd for noise mitigation 

As part of acoustic noise mitigation calibration, we need to enable
FastPkgCRampDisable upd along with slew rate = 1. This values has been
derived based on noise calibration done.

Please refer document 575216 for procedure.

BUG=None
BRANCH=dedede
TEST=correct value has been programmed and slew rate measurement
is correct on scope.

Change-Id: Ie42c8ab647ff42fa043b6f717a9834f9b9c551f6
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49134
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
This commit is contained in:
Maulik V Vaghela 2021-01-06 11:13:07 +05:30 committed by Karthik Ramasubramanian
parent 2e424ff2d7
commit 7e06a9044a
1 changed files with 2 additions and 1 deletions
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3
src/mainboard/google/dedede/variants/drawcia/overridetree.cb
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@ -67,7 +67,8 @@ chip soc/intel/jasperlake
# Enable Acoustic noise mitigation and set slew rate to 1/4 # Enable Acoustic noise mitigation and set slew rate to 1/4
# Rest of the parameters are 0 by default. # Rest of the parameters are 0 by default.
register "AcousticNoiseMitigation" = "1" register "AcousticNoiseMitigation" = "1"
register "SlowSlewRate" = "1" register "SlowSlewRate" = "SlewRateFastBy4"
register "FastPkgCRampDisable" = "1"
device domain 0 on device domain 0 on
device pci 05.0 on # IPU - MIPI Camera device pci 05.0 on # IPU - MIPI Camera