Hello Pierre,

On Thu, 6 May 2021 at 12:43, <Pierre.Gondois@...> wrote:

From: Nicola Mazzucato <nicola.mazzucato@...>

The SCP-firmware has moved to full support for SCMIv2 which means that
the base protocol can be either compliant with SCMI v1 or v2.

Allow any version between SCMI v1.0 and SCMI v2.0 to be compatible
with the current implementation.

Signed-off-by: Nicola Mazzucato <nicola.mazzucato@...>

SOB is not an attribution of authorship, it is a statement made by the
person contributing the patch asserting that the contribution complies
with the license.

IOW, you can keep the From: line, but please change the SOB to your
name and email.

Thanks,
Ard.

---
The changes can be seen at: https://github.com/PierreARM/edk2/tree/1732_Update_SCMI_version_v1

ArmPkg/Drivers/ArmScmiDxe/ScmiDxe.c | 10 ++++++----
ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h | 10 +++++-----
2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/ArmPkg/Drivers/ArmScmiDxe/ScmiDxe.c b/ArmPkg/Drivers/ArmScmiDxe/ScmiDxe.c
index d5890a7633a2..fb4e79aa3610 100644
--- a/ArmPkg/Drivers/ArmScmiDxe/ScmiDxe.c
+++ b/ArmPkg/Drivers/ArmScmiDxe/ScmiDxe.c
@@ -4,9 +4,9 @@

SPDX-License-Identifier: BSD-2-Clause-Patent

- System Control and Management Interface V1.0
- http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
- DEN0056A_System_Control_and_Management_Interface.pdf
+ @par Specification Reference:
+ - Arm System Control and Management Interface - Platform Design Document
+ (https://developer.arm.com/documentation/den0056/)
**/

#include <Base.h>
@@ -86,7 +86,9 @@ ArmScmiDxeEntryPoint (
return Status;
}

- if (Version != BASE_PROTOCOL_VERSION) {
+ // Accept any version between SCMI v1.0 and SCMI v2.0
+ if ((Version < BASE_PROTOCOL_VERSION_V1) ||
+ (Version > BASE_PROTOCOL_VERSION_V2)) {
ASSERT (FALSE);
return EFI_UNSUPPORTED;
}
diff --git a/ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h b/ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h
index 73ad3e32a2f5..c4b81c0f56d3 100644
--- a/ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h
+++ b/ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h
@@ -4,9 +4,9 @@

SPDX-License-Identifier: BSD-2-Clause-Patent

- System Control and Management Interface V1.0
- http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
- DEN0056A_System_Control_and_Management_Interface.pdf
+ @par Specification Reference:
+ - Arm System Control and Management Interface - Platform Design Document
+ (https://developer.arm.com/documentation/den0056/)
**/

#ifndef ARM_SCMI_BASE_PROTOCOL_H_
@@ -14,7 +14,8 @@

#include <Protocol/ArmScmi.h>

-#define BASE_PROTOCOL_VERSION 0x10000
+#define BASE_PROTOCOL_VERSION_V1 0x10000
+#define BASE_PROTOCOL_VERSION_V2 0x20000

#define NUM_PROTOCOL_MASK 0xFFU
#define NUM_AGENT_MASK 0xFFU
@@ -165,4 +166,3 @@ typedef enum {
} SCMI_MESSAGE_ID_BASE;

#endif /* ARM_SCMI_BASE_PROTOCOL_H_ */
-
--
2.17.1