[PATCH 0/2] Add new IPCC mailbox to support the coprocessor detach on some stm32mp15x boards

[PATCH 0/2] Add new IPCC mailbox to support the coprocessor detach on some stm32mp15x boards

[Arnaud Pouliquen]

Purpose:
  Add the IPCC channel 4 as "detach" mailbox to support the remoteproc the feature added in [1].

  The enable of this feature is a design choice. As consequence, the new mbox is declared
  only for stm32mp157c-ed1 & stm32mp15x-dkx boards maintained by ST Microelectronics.

Aim:
  Allow to send to the remote processor a HW signal on IPCC channel 4 when user space requests
  to detach the main processor from the remote processor (e.g. a reboot of the  Linux processor
  on a crash).

[1] https://patchwork.ozlabs.org/project/devicetree-bindings/cover/20210331073347.8293-1-arnaud.pouliquen@foss.st.com/

Arnaud Pouliquen (2):
  ARM: dts: stm32: Add coprocessor detach mbox on stm32mp157c-ed1 board
  ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15x-dkx boards

 arch/arm/boot/dts/stm32mp157c-ed1.dts  | 4 ++--
 arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

-- 
2.17.1

[PATCH 1/2] ARM: dts: stm32: Add coprocessor detach mbox on stm32mp157c-ed1 board

[Arnaud Pouliquen]

To support the detach feature, add a new mailbox channel to inform
the remote processor on a detach. This signal allows the remote processor
firmware to stop IPC communication and to reinitialize the resources for
a re-attach.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 arch/arm/boot/dts/stm32mp157c-ed1.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
index 95b08876b2b3..46b471d09c50 100644
--- a/arch/arm/boot/dts/stm32mp157c-ed1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
@@ -313,8 +313,8 @@
 &m4_rproc {
 	memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
 			<&vdev0vring1>, <&vdev0buffer>;
-	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
-	mbox-names = "vq0", "vq1", "shutdown";
+	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>;
+	mbox-names = "vq0", "vq1", "shutdown", "detach";
 	interrupt-parent = <&exti>;
 	interrupts = <68 1>;
 	status = "okay";
-- 
2.17.1

[PATCH 2/2] ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15x-dkx boards

[Arnaud Pouliquen]

To support the detach feature, add a new mailbox channel to inform
the remote processor on a detach. This signal allows the remote processor
firmware to stop IPC communication and to reinitialize the resources for
a re-attach.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index 59f18846cf5d..06c11bad882a 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -470,8 +470,8 @@
 &m4_rproc {
 	memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
 			<&vdev0vring1>, <&vdev0buffer>;
-	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
-	mbox-names = "vq0", "vq1", "shutdown";
+	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>;
+	mbox-names = "vq0", "vq1", "shutdown", "detach";
 	interrupt-parent = <&exti>;
 	interrupts = <68 1>;
 	status = "okay";
-- 
2.17.1

Re: [PATCH 0/2] Add new IPCC mailbox to support the coprocessor detach on some stm32mp15x boards

[Alexandre TORGUE]

Hi Arnaud

On 6/14/21 6:49 PM, Arnaud Pouliquen wrote:
> Purpose:
>    Add the IPCC channel 4 as "detach" mailbox to support the remoteproc the feature added in [1].
> 
>    The enable of this feature is a design choice. As consequence, the new mbox is declared
>    only for stm32mp157c-ed1 & stm32mp15x-dkx boards maintained by ST Microelectronics.
> 
> Aim:
>    Allow to send to the remote processor a HW signal on IPCC channel 4 when user space requests
>    to detach the main processor from the remote processor (e.g. a reboot of the  Linux processor
>    on a crash).
> 
> [1] https://patchwork.ozlabs.org/project/devicetree-bindings/cover/20210331073347.8293-1-arnaud.pouliquen@foss.st.com/
> 
> Arnaud Pouliquen (2):
>    ARM: dts: stm32: Add coprocessor detach mbox on stm32mp157c-ed1 board
>    ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15x-dkx boards
> 
>   arch/arm/boot/dts/stm32mp157c-ed1.dts  | 4 ++--
>   arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 ++--
>   2 files changed, 4 insertions(+), 4 deletions(-)
> 

Series Applied on stm32-next;

thanks
Alex