diff --git a/src/mainboard/system76/adl/devicetree.cb b/src/mainboard/system76/adl/devicetree.cb
index ad70b0595b..a424497c22 100644
--- a/src/mainboard/system76/adl/devicetree.cb
+++ b/src/mainboard/system76/adl/devicetree.cb
@@ -81,6 +81,7 @@ chip soc/intel/alderlake
 		end
 		device ref p2sb on end
 		device ref hda on
+			register "pch_hda_sdi_enable[0]" = "1"
 			register "pch_hda_audio_link_hda_enable" = "1"
 			register "pch_hda_idisp_codec_enable" = "1"
 			register "pch_hda_idisp_link_frequency" = "HDA_LINKFREQ_96MHZ"
diff --git a/src/mainboard/system76/adl/variants/lemp11/romstage.c b/src/mainboard/system76/adl/variants/lemp11/romstage.c
index 989b5dff8f..211ab97d20 100644
--- a/src/mainboard/system76/adl/variants/lemp11/romstage.c
+++ b/src/mainboard/system76/adl/variants/lemp11/romstage.c
@@ -15,7 +15,6 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 	};
 	const bool half_populated = false;
 
-	mupd->FspmConfig.PchHdaAudioLinkHdaEnable = 1;
 	mupd->FspmConfig.DmiMaxLinkSpeed = 4;
 	mupd->FspmConfig.GpioOverride = 0;
 
diff --git a/src/mainboard/system76/adl/variants/oryp10/romstage.c b/src/mainboard/system76/adl/variants/oryp10/romstage.c
index 082d0cbd10..dfd826a759 100644
--- a/src/mainboard/system76/adl/variants/oryp10/romstage.c
+++ b/src/mainboard/system76/adl/variants/oryp10/romstage.c
@@ -33,7 +33,6 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 	// Set primary display to internal graphics
 	mupd->FspmConfig.PrimaryDisplay = 0;
 
-	mupd->FspmConfig.PchHdaAudioLinkHdaEnable = 1;
 	mupd->FspmConfig.DmiMaxLinkSpeed = 4;
 	mupd->FspmConfig.GpioOverride = 0;
 
diff --git a/src/mainboard/system76/adl/variants/oryp9/romstage.c b/src/mainboard/system76/adl/variants/oryp9/romstage.c
index 201fc75f37..cea4ff5155 100644
--- a/src/mainboard/system76/adl/variants/oryp9/romstage.c
+++ b/src/mainboard/system76/adl/variants/oryp9/romstage.c
@@ -30,7 +30,6 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 	// Set primary display to internal graphics
 	mupd->FspmConfig.PrimaryDisplay = 0;
 
-	mupd->FspmConfig.PchHdaAudioLinkHdaEnable = 1;
 	mupd->FspmConfig.DmiMaxLinkSpeed = 4;
 	mupd->FspmConfig.GpioOverride = 0;
 
diff --git a/src/mainboard/system76/rpl/devicetree.cb b/src/mainboard/system76/rpl/devicetree.cb
index a016dec962..56c1f0751a 100644
--- a/src/mainboard/system76/rpl/devicetree.cb
+++ b/src/mainboard/system76/rpl/devicetree.cb
@@ -65,6 +65,7 @@ chip soc/intel/alderlake
 		end
 		device ref p2sb on end
 		device ref hda on
+			register "pch_hda_sdi_enable[0]" = "1"
 			register "pch_hda_audio_link_hda_enable" = "1"
 			register "pch_hda_idisp_codec_enable" = "1"
 			register "pch_hda_idisp_link_frequency" = "HDA_LINKFREQ_96MHZ"