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mb/google/nissa/var/telith: Configure Acoustic noise mitigation

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- Set slow slew rate VCCIA and VCCGT to SLEW_FAST_4

BUG=b:387056119
BRANCH=none
TEST=built firmware and verified by power team, and noise pass.

Change-Id: I57055cdfc9377ba141c620dd4e9301f6e7601629
Signed-off-by: Kun Liu <liukun11@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86103
Reviewed-by: Dengwu Yu <yudengwu@huaqin.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
This commit is contained in:
Kun Liu 2025-01-22 17:47:41 +08:00 • committed by Subrata Banik
commit 9dee482a8d
1 changed files with 2 additions and 2 deletions
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4
src/mainboard/google/brya/variants/telith/overridetree.cb
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@ -22,8 +22,8 @@ chip soc/intel/alderlake
# Acoustic settings
register "acoustic_noise_mitigation" = "true"
register "slow_slew_rate[VR_DOMAIN_IA]" = "SLEW_FAST_8"
register "slow_slew_rate[VR_DOMAIN_GT]" = "SLEW_FAST_8"
register "slow_slew_rate[VR_DOMAIN_IA]" = "SLEW_FAST_4"
register "slow_slew_rate[VR_DOMAIN_GT]" = "SLEW_FAST_4"
register "fast_pkg_c_ramp_disable[VR_DOMAIN_IA]" = "1"
register "fast_pkg_c_ramp_disable[VR_DOMAIN_GT]" = "1"