From 68ede7b8600038ac41d17ba1362280cb300e36a1 Mon Sep 17 00:00:00 2001
From: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Date: Tue, 17 Jun 2025 16:58:01 +0900
Subject: [PATCH] mb/google/nissa/var/meliks: Configure Acoustic noise
 mitigation

Set slow_slew_rate for VCCIA and VCCGT to SLEW_FAST_8 to improve EE
noise for meliks.

BRANCH=nissa
TEST=built firmware and got pass for EE noise test.

Change-Id: Ie1a9147736e3effa465134854ecd34554bee6906
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88126
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward Doan <edoan@chromium.org>
---
 src/mainboard/google/brya/variants/meliks/overridetree.cb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/mainboard/google/brya/variants/meliks/overridetree.cb b/src/mainboard/google/brya/variants/meliks/overridetree.cb
index 9595616aaf..057bc74309 100644
--- a/src/mainboard/google/brya/variants/meliks/overridetree.cb
+++ b/src/mainboard/google/brya/variants/meliks/overridetree.cb
@@ -7,6 +7,13 @@ chip soc/intel/alderlake
 
 	register "sagv" = "SaGv_Enabled"
 
+	# Acoustic settings
+	register "acoustic_noise_mitigation" = "1"
+	register "slow_slew_rate[VR_DOMAIN_IA]" = "SLEW_FAST_8"
+	register "slow_slew_rate[VR_DOMAIN_GT]" = "SLEW_FAST_8"
+	register "fast_pkg_c_ramp_disable[VR_DOMAIN_IA]" = "1"
+	register "fast_pkg_c_ramp_disable[VR_DOMAIN_GT]" = "1"
+
 	# SOC Aux orientation override:
 	# This is a bitfield that corresponds to up to 4 TCSS ports.
 	# Bits (0,1) allocated for TCSS Port1 configuration and Bits (2,3)for TCSS Port2.