diff --git a/src/mainboard/google/volteer/variants/voxel/overridetree.cb b/src/mainboard/google/volteer/variants/voxel/overridetree.cb
index 8ce687567b..d7a265b010 100644
--- a/src/mainboard/google/volteer/variants/voxel/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/voxel/overridetree.cb
@@ -1,4 +1,6 @@
 chip soc/intel/tigerlake
+	register "DdiPort1Hpd" = "0"
+	register "DdiPort2Hpd" = "0"
 	register "tcc_offset" = "5"     # TCC of 95
 
 	register "power_limits_config[POWER_LIMITS_U_2_CORE]" = "{