diff --git a/MdePkg/Include/IndustryStandard/Tpm2Acpi.h b/MdePkg/Include/IndustryStandard/Tpm2Acpi.h
index 882e21dfe5..76ca691713 100644
--- a/MdePkg/Include/IndustryStandard/Tpm2Acpi.h
+++ b/MdePkg/Include/IndustryStandard/Tpm2Acpi.h
@@ -17,9 +17,11 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 
 #define EFI_TPM2_ACPI_TABLE_REVISION_3  3
 #define EFI_TPM2_ACPI_TABLE_REVISION_4  4
+#define EFI_TPM2_ACPI_TABLE_REVISION_5  5
 #define EFI_TPM2_ACPI_TABLE_REVISION    EFI_TPM2_ACPI_TABLE_REVISION_4
 
 #define EFI_TPM2_ACPI_TABLE_START_METHOD_SPECIFIC_PARAMETERS_MAX_SIZE_REVISION_4  12
+#define EFI_TPM2_ACPI_TABLE_START_METHOD_SPECIFIC_PARAMETERS_MAX_SIZE_REVISION_5  16
 #define EFI_TPM2_ACPI_TABLE_START_METHOD_SPECIFIC_PARAMETERS_MAX_SIZE             EFI_TPM2_ACPI_TABLE_START_METHOD_SPECIFIC_PARAMETERS_MAX_SIZE_REVISION_4
 
 typedef struct {
@@ -40,6 +42,7 @@ typedef struct {
 #define EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE            7
 #define EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE_WITH_ACPI  8
 #define EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE_WITH_SMC   11
+#define EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE_WITH_FFA   15
 
 typedef struct {
   UINT32    Reserved;