diff --git a/src/soc/amd/cezanne/early_fch.c b/src/soc/amd/cezanne/early_fch.c
index dd096e05e8..cdb1f12aad 100644
--- a/src/soc/amd/cezanne/early_fch.c
+++ b/src/soc/amd/cezanne/early_fch.c
@@ -17,6 +17,7 @@ void fch_pre_init(void)
 	fch_smbus_init();
 	fch_enable_cf9_io();
 	fch_enable_legacy_io();
+	fch_disable_legacy_dma_io();
 	enable_aoac_devices();
 
 	/*
diff --git a/src/soc/amd/cezanne/romstage.c b/src/soc/amd/cezanne/romstage.c
index 2740d8c74c..b35e6a56af 100644
--- a/src/soc/amd/cezanne/romstage.c
+++ b/src/soc/amd/cezanne/romstage.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <acpi/acpi.h>
+#include <amdblocks/acpimmio.h>
 #include <amdblocks/memmap.h>
 #include <arch/cpu.h>
 #include <console/console.h>
@@ -31,6 +32,9 @@ asmlinkage void car_stage_entry(void)
 
 	fsp_memory_init(acpi_is_wakeup_s3());
 
+	/* Fixup settings FSP-M should not be changing */
+	fch_disable_legacy_dma_io();
+
 	memmap_stash_early_dram_usage();
 
 	run_ramstage();