[PATCH v4 0/5] arm64: dts: qcom: sdm630/660 FastRPC fixes

[PATCH v4 0/5] arm64: dts: qcom: sdm630/660 FastRPC fixes

[Nickolay Goppen]

This series introduces fixes that make FastRPC on SDM660 work properly.
Currently only the calculator_example test passes on both ADSP and 
CDSP [1].
Also assign adsp_mem region to the ADSP's FastRPC node.

[1]: https://github.com/qualcomm/fastrpc/issues/269#issuecomment-4232125297

Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
---
Changes in v4:
- Added CP_ADSP_SHARED VMID to dt-bindings (Ekansh Gupta and Konrad Dybcio)
- Added Fixes tags
- Link to v3: https://patch.msgid.link/20260422-qcom-sdm660-cdsp-adsp-fastrpc-dts-fix-v3-0-274ba3715db0@mainlining.org

Changes in v3:
- Brought back patch that changed adsp_mem to reusable (Ekansh Gupta)
- Changed adsp_mem to dynamic allocation (Ekansh Gupta)
- Fixed alignment of the vmids property of adsp
- Link to v2: https://patch.msgid.link/20260420-qcom-sdm660-cdsp-adsp-fastrpc-dts-fix-v2-0-f6c7ab3c889a@mainlining.org

Changes in v2:
- Dropped patch that changed adsp_mem to reusable
- Added vmids to fastrpc subnode of adsp (Ekansh Gupta)
- Link to v1: https://patch.msgid.link/20260415-qcom-sdm660-cdsp-adsp-fastrpc-dts-fix-v1-0-03b475b29554@mainlining.org

To: Bjorn Andersson <andersson@kernel.org>
To: Konrad Dybcio <konradybcio@kernel.org>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Nickolay Goppen <setotau@mainlining.org>
Cc: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: ~postmarketos/upstreaming@lists.sr.ht
Cc: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Cc: Konrad Dybcio <konradybcio@gmail.com>

---
Nickolay Goppen (5):
      arm64: dts: qcom: sdm660: set cdsp compute-cbs' regs properly
      arm64: dts: qcom: sdm630: set adsp compute-cbs' regs properly
      arm64: dts: qcom: sdm630: describe adsp_mem region properly
      dt-bindings: firmware: qcom: scm: add CP_ADSP_SHARED VMID
      arm64: dts: qcom: sdm630: assign adsp_mem region to ADSP FastRPC node

 arch/arm64/boot/dts/qcom/sdm630.dtsi    | 28 +++++++++++++++----------
 arch/arm64/boot/dts/qcom/sdm660.dtsi    | 36 ++++++++++++++++-----------------
 include/dt-bindings/firmware/qcom,scm.h |  1 +
 3 files changed, 36 insertions(+), 29 deletions(-)
---
base-commit: 5a154741a8271f2db906ed4c33a55a1c83e84da1
change-id: 20260415-qcom-sdm660-cdsp-adsp-fastrpc-dts-fix-d0ca7632045a

Best regards,
--  
Nickolay Goppen <setotau@mainlining.org>

[PATCH v4 1/5] arm64: dts: qcom: sdm660: set cdsp compute-cbs' regs properly

[Nickolay Goppen]

Changing FastRPC compute-cbs' reg values to matching iommu streams
solves SMMU translation errors when trying to use FastRPC on CDSP
so change FastRPC compute-cbs' reg values that way

Fixes: c0c32a9e3493 ("arm64: dts: qcom: sdm630/660: Add CDSP-related nodes")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
---
 arch/arm64/boot/dts/qcom/sdm660.dtsi | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm660.dtsi b/arch/arm64/boot/dts/qcom/sdm660.dtsi
index 3fd6dd82a992..0fca9662c64a 100644
--- a/arch/arm64/boot/dts/qcom/sdm660.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm660.dtsi
@@ -350,57 +350,57 @@ fastrpc {
 				#address-cells = <1>;
 				#size-cells = <0>;
 
-				compute-cb@5 {
+				compute-cb@3 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <5>;
+					reg = <3>;
 					iommus = <&cdsp_smmu 3>;
 				};
 
-				compute-cb@6 {
+				compute-cb@4 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <6>;
+					reg = <4>;
 					iommus = <&cdsp_smmu 4>;
 				};
 
-				compute-cb@7 {
+				compute-cb@5 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <7>;
+					reg = <5>;
 					iommus = <&cdsp_smmu 5>;
 				};
 
-				compute-cb@8 {
+				compute-cb@6 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <8>;
+					reg = <6>;
 					iommus = <&cdsp_smmu 6>;
 				};
 
-				compute-cb@9 {
+				compute-cb@7 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <9>;
+					reg = <7>;
 					iommus = <&cdsp_smmu 7>;
 				};
 
-				compute-cb@10 {
+				compute-cb@8 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <10>;
+					reg = <8>;
 					iommus = <&cdsp_smmu 8>;
 				};
 
-				compute-cb@11 {
+				compute-cb@9 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <11>;
+					reg = <9>;
 					iommus = <&cdsp_smmu 9>;
 				};
 
-				compute-cb@12 {
+				compute-cb@10 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <12>;
+					reg = <10>;
 					iommus = <&cdsp_smmu 10>;
 				};
 
-				compute-cb@13 {
+				compute-cb@11 {
 					compatible = "qcom,fastrpc-compute-cb";
-					reg = <13>;
+					reg = <11>;
 					iommus = <&cdsp_smmu 11>;
 				};
 			};

-- 
2.54.0

[PATCH v4 2/5] arm64: dts: qcom: sdm630: set adsp compute-cbs' regs properly

[Nickolay Goppen]

Changing FastRPC compute-cbs' reg values to matching iommu streams
solves SMMU translation errors when trying to use FastRPC on ADSP
so change FastRPC compute-cbs' reg values that way

Fixes: af2ce7296643 ("arm64: dts: qcom: sdm630: Add FastRPC nodes to ADSP")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
---
 arch/arm64/boot/dts/qcom/sdm630.dtsi | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm630.dtsi b/arch/arm64/boot/dts/qcom/sdm630.dtsi
index bef3213165d6..4b47efdb57b2 100644
--- a/arch/arm64/boot/dts/qcom/sdm630.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm630.dtsi
@@ -2459,27 +2459,27 @@ fastrpc {
 					#address-cells = <1>;
 					#size-cells = <0>;
 
-					compute-cb@1 {
+					compute-cb@3 {
 						compatible = "qcom,fastrpc-compute-cb";
-						reg = <1>;
+						reg = <3>;
 						iommus = <&lpass_smmu 3>;
 					};
 
-					compute-cb@2 {
+					compute-cb@7 {
 						compatible = "qcom,fastrpc-compute-cb";
-						reg = <2>;
+						reg = <7>;
 						iommus = <&lpass_smmu 7>;
 					};
 
-					compute-cb@3 {
+					compute-cb@8 {
 						compatible = "qcom,fastrpc-compute-cb";
-						reg = <3>;
+						reg = <8>;
 						iommus = <&lpass_smmu 8>;
 					};
 
-					compute-cb@4 {
+					compute-cb@9 {
 						compatible = "qcom,fastrpc-compute-cb";
-						reg = <4>;
+						reg = <9>;
 						iommus = <&lpass_smmu 9>;
 					};
 				};

-- 
2.54.0

[PATCH v4 3/5] arm64: dts: qcom: sdm630: describe adsp_mem region properly

[Nickolay Goppen]

Downstream [1] this region is marked as shared, reusable and dynamic so
describe it that way.

[1]: https://github.com/xiaomi-sdm660/android_kernel_xiaomi_sdm660/blob/11-EAS/arch/arm/boot/dts/qcom/sdm660.dtsi#L448

Fixes: b190fb010664 ("arm64: dts: qcom: sdm630: Add sdm630 dts file")
Cc: stable@vger.kernel.org
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
---
 arch/arm64/boot/dts/qcom/sdm630.dtsi | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm630.dtsi b/arch/arm64/boot/dts/qcom/sdm630.dtsi
index 4b47efdb57b2..36b419dea153 100644
--- a/arch/arm64/boot/dts/qcom/sdm630.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm630.dtsi
@@ -494,9 +494,12 @@ venus_region: venus@9f800000 {
 			no-map;
 		};
 
-		adsp_mem: adsp-region@f6000000 {
-			reg = <0x0 0xf6000000 0x0 0x800000>;
-			no-map;
+		adsp_mem: adsp-region {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;
+			alignment = <0x0 0x400000>;
+			size = <0x0 0x800000>;
+			reusable;
 		};
 
 		qseecom_mem: qseecom-region@f6800000 {

-- 
2.54.0

[PATCH v4 4/5] dt-bindings: firmware: qcom: scm: add CP_ADSP_SHARED VMID

[Nickolay Goppen]

CP_ADSP_SHARED is used in FastRPC driver for older SoC's such as sdm660
for interacting with ADSP memory region [1]

[1]: https://github.com/xiaomi-sdm660/android_kernel_xiaomi_sdm660/blob/11-EAS/drivers/char/adsprpc.c#L3602

Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
---
 include/dt-bindings/firmware/qcom,scm.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/firmware/qcom,scm.h b/include/dt-bindings/firmware/qcom,scm.h
index 6de8b08e1e79..0d29d8d4829c 100644
--- a/include/dt-bindings/firmware/qcom,scm.h
+++ b/include/dt-bindings/firmware/qcom,scm.h
@@ -35,5 +35,6 @@
 #define QCOM_SCM_VMID_NAV		0x2B
 #define QCOM_SCM_VMID_TVM		0x2D
 #define QCOM_SCM_VMID_OEMVM		0x31
+#define QCOM_SCM_VMID_CP_ADSP_SHARED	0x33
 
 #endif

-- 
2.54.0

Re: [PATCH v4 4/5] dt-bindings: firmware: qcom: scm: add CP_ADSP_SHARED VMID

[Krzysztof Kozlowski]

On Fri, Apr 24, 2026 at 02:13:06PM +0300, Nickolay Goppen wrote:
> CP_ADSP_SHARED is used in FastRPC driver for older SoC's such as sdm660
> for interacting with ADSP memory region [1]
> 
> [1]: https://github.com/xiaomi-sdm660/android_kernel_xiaomi_sdm660/blob/11-EAS/drivers/char/adsprpc.c#L3602
> 
> Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
> ---
>  include/dt-bindings/firmware/qcom,scm.h | 1 +
>  1 file changed, 1 insertion(+)

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

[PATCH v4 5/5] arm64: dts: qcom: sdm630: assign adsp_mem region to ADSP FastRPC node

[Nickolay Goppen]

Downstream [1] ADSP FastRPC node has the adsp_mem region assigned, so
assign it to the ADSP FastRPC node.

[1]: https://github.com/xiaomi-sdm660/android_kernel_xiaomi_sdm660/blob/11-EAS/arch/arm/boot/dts/qcom/sdm660.dtsi#L1693

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
---
 arch/arm64/boot/dts/qcom/sdm630.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm630.dtsi b/arch/arm64/boot/dts/qcom/sdm630.dtsi
index 36b419dea153..77ea4070a37c 100644
--- a/arch/arm64/boot/dts/qcom/sdm630.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm630.dtsi
@@ -2458,6 +2458,9 @@ fastrpc {
 					compatible = "qcom,fastrpc";
 					qcom,glink-channels = "fastrpcglink-apps-dsp";
 					label = "adsp";
+					memory-region = <&adsp_mem>;
+					qcom,vmids = <QCOM_SCM_VMID_HLOS
+						      QCOM_SCM_VMID_CP_ADSP_SHARED>;
 					qcom,non-secure-domain;
 					#address-cells = <1>;
 					#size-cells = <0>;

-- 
2.54.0

Re: [PATCH v4 5/5] arm64: dts: qcom: sdm630: assign adsp_mem region to ADSP FastRPC node

[Konrad Dybcio]

On 4/24/26 1:13 PM, Nickolay Goppen wrote:
> Downstream [1] ADSP FastRPC node has the adsp_mem region assigned, so
> assign it to the ADSP FastRPC node.
> 
> [1]: https://github.com/xiaomi-sdm660/android_kernel_xiaomi_sdm660/blob/11-EAS/arch/arm/boot/dts/qcom/sdm660.dtsi#L1693
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
> Signed-off-by: Nickolay Goppen <setotau@mainlining.org>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad