diff --git a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
index b58dc2ce8d..147112ae00 100644
--- a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
@@ -350,6 +350,8 @@ chip soc/amd/cezanne
 				end
 			end # Audio
 		end
+		device ref gpp_bridge_b off end  # Internal GPP Bridge 1 to Bus B
+		device ref gpp_bridge_c off end  # Internal GPP Bridge 2 to Bus C
 
 		device ref lpc_bridge on
 			chip ec/google/chromeec
diff --git a/src/soc/amd/cezanne/chipset.cb b/src/soc/amd/cezanne/chipset.cb
index ccce4859d8..14dba64fa7 100644
--- a/src/soc/amd/cezanne/chipset.cb
+++ b/src/soc/amd/cezanne/chipset.cb
@@ -22,7 +22,7 @@ chip soc/amd/cezanne
 		device pci 02.7 alias gpp_bridge_6 off ops amd_external_pcie_gpp_ops end
 
 		device pci 08.0 on end # Dummy device function, do not disable
-		device pci 08.1 alias gpp_bridge_a off  # Internal GPP Bridge 0 to Bus A
+		device pci 08.1 alias gpp_bridge_a on  # Internal GPP Bridge 0 to Bus A
 			ops amd_internal_pcie_gpp_ops
 			device pci 0.0 alias gfx off ops amd_graphics_ops end # Internal GPU (GFX)
 			device pci 0.1 alias gfx_hda off end # Display HD Audio Controller (GFXAZ)
@@ -83,14 +83,14 @@ chip soc/amd/cezanne
 			device pci 0.6 alias hda off end # Audio Processor HD Audio Controller (main AZ)
 			device pci 0.7 alias mp2 off end # Sensor Fusion Hub (MP2)
 		end
-		device pci 08.2 alias gpp_bridge_b off # Internal GPP Bridge 1 to Bus B
+		device pci 08.2 alias gpp_bridge_b on # Internal GPP Bridge 1 to Bus B
 			ops amd_internal_pcie_gpp_ops
 			device pci 0.0 alias sata_0 off end # first SATA controller; AHCI Mode
 			device pci 0.1 alias sata_1 off end # second SATA Controller; SATA Raid/AHCI Mode
 			device pci 0.2 alias xgbe_0 off end # 10 GbE Controller Port 0 (XGBE0)
 			device pci 0.3 alias xgbe_1 off end # 10 GbE Controller Port 1 (XGBE1)
 		end
-		device pci 08.3 alias gpp_bridge_c off # Internal GPP Bridge 2 to Bus C
+		device pci 08.3 alias gpp_bridge_c on # Internal GPP Bridge 2 to Bus C
 			ops amd_internal_pcie_gpp_ops
 			device pci 0.0 alias dummy_function_c off end # PCIe Dummy Function
 			device pci 0.2 alias i2s_ac97 off end # I2S/AC'97 Audio