[PATCH v2 0/5] Describe MT8188's SCP as dual-core

[PATCH v2 0/5] Describe MT8188's SCP as dual-core

[Nícolas F. R. A. Prado]

This series updates the MT8188 SCP description to dual-core and prepares
its usage. Patch 4 updates the MT8188 DT to describe the SCP as a dual
core cluster and patch 5 adds the firmware-name property so the firmware
can be loaded. Patches 1 through 3 are dt-binding fixes for the SCP.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
Changes in v2:
- Added patch 3 removing redundant reg maxItems
- Clarified commit message for patch 1
- Rebased now that MDP3 series dependency has been merged
- Link to v1: https://lore.kernel.org/r/20250318-scp-dual-core-mt8390-v1-0-8733e192cc73@collabora.com

---
Nícolas F. R. A. Prado (5):
      dt-bindings: remoteproc: mediatek: Add missing minItems for 8192/8195
      dt-bindings: remoteproc: mediatek: Remove l1tcm for dual-core MT8188 SCP
      dt-bindings: remoteproc: mediatek: Drop redundant maxItems for mt8192/95
      arm64: dts: mediatek: mt8188: Describe SCP as a cluster with two cores
      arm64: dts: mediatek: mt8390-genio-common: Add firmware-name for scp0

 .../devicetree/bindings/remoteproc/mtk,scp.yaml    | 21 ++++++++++---
 arch/arm64/boot/dts/mediatek/mt8188-evb.dts        |  6 +++-
 arch/arm64/boot/dts/mediatek/mt8188.dtsi           | 36 ++++++++++++++++------
 .../boot/dts/mediatek/mt8390-genio-common.dtsi     |  7 ++++-
 4 files changed, 55 insertions(+), 15 deletions(-)
---
base-commit: bc8aa6cdadcc00862f2b5720e5de2e17f696a081
change-id: 20250318-scp-dual-core-mt8390-8ef1b02f2d92

Best regards,
-- 
Nícolas F. R. A. Prado <nfraprado@collabora.com>

[PATCH v2 1/5] dt-bindings: remoteproc: mediatek: Add missing minItems for 8192/8195

[Nícolas F. R. A. Prado]

Both MT8192 and MT8195 have an L1TCM memory, so it should be described
in reg, and therefore reg's minItems should be 3, as is already implicit
by reg-names being three entries long. However minItems is currently
unset for mt8192/mt8195, resulting in it being equal to 2, from the base
schema. Fix reg minItems for MT8192 and MT8195 by setting it to 3.

Fixes: 6b55b1e2fd7f ("dt-bindings: remoteproc: mediatek: Support MT8195 dual-core SCP")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
index adc6b3f36fde49eb3fa7ed3f08b0fa9e7f331162..ee33c233e44f3d51f0851b35697a24208c87f68a 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
@@ -185,6 +185,7 @@ allOf:
     then:
       properties:
         reg:
+          minItems: 3
           maxItems: 3
         reg-names:
           items:

-- 
2.49.0

Re: [PATCH v2 1/5] dt-bindings: remoteproc: mediatek: Add missing minItems for 8192/8195

[AngeloGioacchino Del Regno]

Il 21/04/25 22:49, Nícolas F. R. A. Prado ha scritto:
> Both MT8192 and MT8195 have an L1TCM memory, so it should be described
> in reg, and therefore reg's minItems should be 3, as is already implicit
> by reg-names being three entries long. However minItems is currently
> unset for mt8192/mt8195, resulting in it being equal to 2, from the base
> schema. Fix reg minItems for MT8192 and MT8195 by setting it to 3.
> 
> Fixes: 6b55b1e2fd7f ("dt-bindings: remoteproc: mediatek: Support MT8195 dual-core SCP")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Re: [PATCH v2 1/5] dt-bindings: remoteproc: mediatek: Add missing minItems for 8192/8195

[Rob Herring]

On Mon, Apr 21, 2025 at 04:49:04PM -0400, Nícolas F. R. A. Prado wrote:
> Both MT8192 and MT8195 have an L1TCM memory, so it should be described
> in reg, and therefore reg's minItems should be 3, as is already implicit
> by reg-names being three entries long. However minItems is currently
> unset for mt8192/mt8195, resulting in it being equal to 2, from the base
> schema. Fix reg minItems for MT8192 and MT8195 by setting it to 3.
> 
> Fixes: 6b55b1e2fd7f ("dt-bindings: remoteproc: mediatek: Support MT8195 dual-core SCP")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> ---
>  Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> index adc6b3f36fde49eb3fa7ed3f08b0fa9e7f331162..ee33c233e44f3d51f0851b35697a24208c87f68a 100644
> --- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> @@ -185,6 +185,7 @@ allOf:
>      then:
>        properties:
>          reg:
> +          minItems: 3
>            maxItems: 3

As the max is already 3 at the top-level, you should drop maxItems here.

>          reg-names:
>            items:
> 
> -- 
> 2.49.0
> 

[PATCH v2 2/5] dt-bindings: remoteproc: mediatek: Remove l1tcm for dual-core MT8188 SCP

[Nícolas F. R. A. Prado]

The SCP present on MT8188 does not have an L1TCM memory region, but the
binding incorrectly requires one for the dual-core description of the
MT8188 SCP. Remove that requirement. Also update the minimum number of
reg and reg-names to 1, since as this is a multi-core SCP with no
L1TCM memory, only the CFG memory region is present in the parent node.

Fixes: 91e0d560b9fd ("dt-bindings: remoteproc: mediatek: Support MT8188 dual-core SCP")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 .../devicetree/bindings/remoteproc/mtk,scp.yaml       | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
index ee33c233e44f3d51f0851b35697a24208c87f68a..04348cfcb0424dc78ff1ddd77665285a052925e9 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
@@ -28,11 +28,11 @@ properties:
     description:
       Should contain the address ranges for memory regions SRAM, CFG, and,
       on some platforms, L1TCM.
-    minItems: 2
+    minItems: 1
     maxItems: 3
 
   reg-names:
-    minItems: 2
+    minItems: 1
     maxItems: 3
 
   clocks:
@@ -171,6 +171,7 @@ allOf:
     then:
       properties:
         reg:
+          minItems: 2
           maxItems: 2
         reg-names:
           items:
@@ -196,16 +197,28 @@ allOf:
       properties:
         compatible:
           enum:
-            - mediatek,mt8188-scp-dual
             - mediatek,mt8195-scp-dual
     then:
       properties:
         reg:
+          minItems: 2
           maxItems: 2
         reg-names:
           items:
             - const: cfg
             - const: l1tcm
+  - if:
+      properties:
+        compatible:
+          enum:
+            - mediatek,mt8188-scp-dual
+    then:
+      properties:
+        reg:
+          maxItems: 1
+        reg-names:
+          items:
+            - const: cfg
 
 additionalProperties: false
 

-- 
2.49.0

[PATCH v2 3/5] dt-bindings: remoteproc: mediatek: Drop redundant maxItems for mt8192/95

[Nícolas F. R. A. Prado]

reg's maxItems is already defined as 3 in the base schema. Remove the
redundant assignment in the if branch for mt8192/mt8195.

Suggested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
index 04348cfcb0424dc78ff1ddd77665285a052925e9..82c7edd5a2fbb8610315881a4033a3a43198162e 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
@@ -187,7 +187,6 @@ allOf:
       properties:
         reg:
           minItems: 3
-          maxItems: 3
         reg-names:
           items:
             - const: sram

-- 
2.49.0

Re: [PATCH v2 3/5] dt-bindings: remoteproc: mediatek: Drop redundant maxItems for mt8192/95

[Rob Herring]

On Mon, Apr 21, 2025 at 04:49:06PM -0400, Nícolas F. R. A. Prado wrote:
> reg's maxItems is already defined as 3 in the base schema. Remove the
> redundant assignment in the if branch for mt8192/mt8195.
> 
> Suggested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> ---
>  Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> index 04348cfcb0424dc78ff1ddd77665285a052925e9..82c7edd5a2fbb8610315881a4033a3a43198162e 100644
> --- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> @@ -187,7 +187,6 @@ allOf:
>        properties:
>          reg:
>            minItems: 3
> -          maxItems: 3

Sigh. I would squash this as using maxItems was the error in the first 
place. But either way:

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>

[PATCH v2 4/5] arm64: dts: mediatek: mt8188: Describe SCP as a cluster with two cores

[Nícolas F. R. A. Prado]

The SCP is currently described in the Devicetree as a single-core
processor, but really it is a cluster with two cores. Describe the full
cluster but enable only core0 on the current mt8188 platforms since
that's the only one usable with the upstream firmware.

Co-developed-by: Tinghan Shen <tinghan.shen@mediatek.com>
Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Co-developed-by: Jason Chen <jason-ch.chen@mediatek.corp-partner.google.com>
Signed-off-by: Jason Chen <jason-ch.chen@mediatek.corp-partner.google.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8188-evb.dts        |  6 +++-
 arch/arm64/boot/dts/mediatek/mt8188.dtsi           | 36 ++++++++++++++++------
 .../boot/dts/mediatek/mt8390-genio-common.dtsi     |  6 +++-
 3 files changed, 37 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188-evb.dts b/arch/arm64/boot/dts/mediatek/mt8188-evb.dts
index f89835ac36f36f86e2054ae0c332172be97b049a..f4c207d65b877e1eefaa26540446c3c06369ca21 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188-evb.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8188-evb.dts
@@ -331,7 +331,11 @@ &pmic {
 	interrupts-extended = <&pio 222 IRQ_TYPE_LEVEL_HIGH>;
 };
 
-&scp {
+&scp_cluster {
+	status = "okay";
+};
+
+&scp_c0 {
 	memory-region = <&scp_mem_reserved>;
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
index 0cfedb837b005d06b31008c687590e4c47727fc7..296090fbaf4953db8075f72073509b731dc41e51 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
@@ -1382,12 +1382,30 @@ gce1: mailbox@10330000 {
 			clocks = <&infracfg_ao CLK_INFRA_AO_GCE2>;
 		};
 
-		scp: scp@10500000 {
-			compatible = "mediatek,mt8188-scp";
-			reg = <0 0x10500000 0 0x100000>,
-			      <0 0x10720000 0 0xe0000>;
-			reg-names = "sram", "cfg";
-			interrupts = <GIC_SPI 462 IRQ_TYPE_LEVEL_HIGH 0>;
+		scp_cluster: scp@10720000 {
+			compatible = "mediatek,mt8188-scp-dual";
+			reg = <0 0x10720000 0 0xe0000>;
+			reg-names = "cfg";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0 0x10500000 0x100000>;
+			status = "disabled";
+
+			scp_c0: scp@0 {
+				compatible = "mediatek,scp-core";
+				reg = <0x0 0xd0000>;
+				reg-names = "sram";
+				interrupts = <GIC_SPI 462 IRQ_TYPE_LEVEL_HIGH 0>;
+				status = "disabled";
+			};
+
+			scp_c1: scp@d0000 {
+				compatible = "mediatek,scp-core";
+				reg = <0xd0000 0x2f000>;
+				reg-names = "sram";
+				interrupts = <GIC_SPI 463 IRQ_TYPE_LEVEL_HIGH 0>;
+				status = "disabled";
+			};
 		};
 
 		afe: audio-controller@10b10000 {
@@ -2249,7 +2267,7 @@ dma-controller@14001000 {
 			mediatek,gce-client-reg = <&gce1 SUBSYS_1400XXXX 0x1000 0x1000>;
 			mediatek,gce-events = <CMDQ_EVENT_VPP0_MDP_RDMA_SOF>,
 					      <CMDQ_EVENT_VPP0_MDP_RDMA_FRAME_DONE>;
-			mediatek,scp = <&scp>;
+			mediatek,scp = <&scp_c0>;
 		};
 
 		display@14002000 {
@@ -2704,7 +2722,7 @@ video_decoder: video-decoder@18000000 {
 			iommus = <&vpp_iommu M4U_PORT_L23_HW_VDEC_UFO_ENC_EXT>;
 			#address-cells = <2>;
 			#size-cells = <2>;
-			mediatek,scp = <&scp>;
+			mediatek,scp = <&scp_c0>;
 
 			video-codec@10000 {
 				compatible = "mediatek,mtk-vcodec-lat";
@@ -2828,7 +2846,7 @@ video_encoder: video-encoder@1a020000 {
 				 <&vdo_iommu M4U_PORT_L19_VENC_SUB_W_LUMA>,
 				 <&vdo_iommu M4U_PORT_L19_VENC_SUB_R_LUMA>;
 			power-domains = <&spm MT8188_POWER_DOMAIN_VENC>;
-			mediatek,scp = <&scp>;
+			mediatek,scp = <&scp_c0>;
 		};
 
 		jpeg_encoder: jpeg-encoder@1a030000 {
diff --git a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi
index e9d57f44475b00f19983a968ae113deb4d86bf12..805a4bccff33e3ac1a16c5fb2cf13914c8e97746 100644
--- a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi
@@ -1055,7 +1055,11 @@ power-key {
 	};
 };
 
-&scp {
+&scp_cluster {
+	status = "okay";
+};
+
+&scp_c0 {
 	memory-region = <&scp_mem>;
 	status = "okay";
 };

-- 
2.49.0

[PATCH v2 5/5] arm64: dts: mediatek: mt8390-genio-common: Add firmware-name for scp0

[Nícolas F. R. A. Prado]

Add the firmware-name property for SCP core0 so the firmware can be
loaded from its canonical location in the linux-firmware repository.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi
index 805a4bccff33e3ac1a16c5fb2cf13914c8e97746..698054ed5d6d4f7b947db6ab5335d3b202bb84d9 100644
--- a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi
@@ -1060,6 +1060,7 @@ &scp_cluster {
 };
 
 &scp_c0 {
+	firmware-name = "mediatek/mt8188/scp.img";
 	memory-region = <&scp_mem>;
 	status = "okay";
 };

-- 
2.49.0

Re: (subset) [PATCH v2 0/5] Describe MT8188's SCP as dual-core

[AngeloGioacchino Del Regno]

On Mon, 21 Apr 2025 16:49:03 -0400, Nícolas F. R. A. Prado wrote:
> This series updates the MT8188 SCP description to dual-core and prepares
> its usage. Patch 4 updates the MT8188 DT to describe the SCP as a dual
> core cluster and patch 5 adds the firmware-name property so the firmware
> can be loaded. Patches 1 through 3 are dt-binding fixes for the SCP.
> 
> 

Applied to v6.15-next/dts64, thanks!

[4/5] arm64: dts: mediatek: mt8188: Describe SCP as a cluster with two cores
      commit: b1e157c61db5e6f8d9c35e8ebc714ab6ce02ee41
[5/5] arm64: dts: mediatek: mt8390-genio-common: Add firmware-name for scp0
      commit: 2f0066dae66f30386ecd6408410e27a4d6818c15

Cheers,
Angelo