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

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Set slow slew rate VCCIA and VCCGT to SLEW_FAST_4

BUG=b:380384127
TEST=built firmware and verified by power team, and noise pass

Change-Id: I54c8412410cca33ffb19a2b21d678b6263ead297
Signed-off-by: Rui Zhou <zhourui@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85863
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
This commit is contained in:
Rui Zhou 2025-01-06 17:19:20 +08:00 • committed by Subrata Banik
commit a7081a44bd
1 changed files with 2 additions and 2 deletions
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4
src/mainboard/google/brya/variants/rull/overridetree.cb
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@ -14,8 +14,8 @@ end
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]" = "true"
register "fast_pkg_c_ramp_disable[VR_DOMAIN_GT]" = "true"