1 files changed, 82 insertions, 0 deletions
diff --git a/config/coreboot/default/patches/0045-mb-lenovo-t480s-Fix-headphone-jack.patch b/config/coreboot/default/patches/0045-mb-lenovo-t480s-Fix-headphone-jack.patch
new file mode 100644
index 00000000..aa75f0ad
--- /dev/null
+++ b/config/coreboot/default/patches/0045-mb-lenovo-t480s-Fix-headphone-jack.patch
@@ -0,0 +1,82 @@
+From 8a9e9a2c66e90f916c891a80ffe2db0767bd0ae8 Mon Sep 17 00:00:00 2001
+From: Matt DeVillier <matt.devillier@gmail.com>
+Date: Wed, 10 Dec 2025 11:02:30 -0600
+Subject: [PATCH 1/1] mb/lenovo/t480s: Fix headphone jack
+
+Add additional register configuration for the Realtek ALC257 audio
+codec on the Lenovo ThinkPad T480s. This includes:
+
+- Hidden register SW reset sequence
+- ClassD 2W amplifier configuration
+- Jack detection (JD1) setup for headphone port
+- Silence data mode threshold setting at -84dB
+
+Copied from the T480, originally sourced from
+mb/google/brya/variants/pujjolo/hda_verb.c
+
+Addresses issue #619
+
+Change-Id: I0ddea39b40566d6966e89c77352c0904b3c60da9
+Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
+---
+ .../sklkbl_thinkpad/variants/t480s/hda_verb.c | 37 ++++++++++++++++++-
+ 1 file changed, 36 insertions(+), 1 deletion(-)
+
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/hda_verb.c b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/hda_verb.c
+index b1d96c5a76..9eb9287f9b 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/hda_verb.c
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/hda_verb.c
+@@ -5,7 +5,7 @@
+ const u32 cim_verb_data[] = {
+ 	0x10ec0257, // Vendor/Device ID: Realtek ALC257
+ 	0x17aa2258, // Subsystem ID
+-	11,
++	18,
+ 	AZALIA_SUBVENDOR(0, 0x17aa2258),
+ 
+ 	AZALIA_PIN_CFG(0, 0x12, AZALIA_PIN_DESC(
+@@ -51,6 +51,41 @@ const u32 cim_verb_data[] = {
+ 		1, 15
+ 	)),
+ 
++	//==========Widget node 0x20 - 0 :Hidden register SW reset
++	0x0205001A,
++	0x0204C003,
++	0x0205001A,
++	0x0204C003,
++	0x05850000,
++	0x0584F880,
++	0x05850000,
++	0x0584F880,
++	//==========Widget node 0x20 - 1 : ClassD 2W
++	0x02050038,
++	0x02048981,
++	0x0205001B,
++	0x02040A4B,
++	//==========Widget node 0x20 - 2
++	0x0205003C,
++	0x02043154,
++	0x0205003C,
++	0x02043114,
++	//==========Widget node 0x20 - 3 :
++	0x02050046,
++	0x02040004,
++	0x05750003,
++	0x057409A3,
++	//==========Widget node 0x20 - 4 :JD1 enable 1JD port for HP JD
++	0x02050009,
++	0x02046003,
++	0x0205000A,
++	0x02047770,
++	//==========Widget node 0x20 - 5 : Silence data mode Threshold (-84dB)
++	0x02050037,
++	0x0204FE15,
++	0x02050030,
++	0x02049004,
++
+ 	0x8086280b, // Vendor/Device ID: Intel Kabylake HDMI
+ 	0x80860101, // Subsystem ID
+ 	4,
+-- 
+2.47.3
+