[PATCH v2] arm64: dts: qcom: agatti: enable FastRPC on the ADSP

[PATCH v2] arm64: dts: qcom: agatti: enable FastRPC on the ADSP

[Dmitry Baryshkov]

On Agatti platform the ADSP provides FastRPC support. Add corresponding
device node, in order to be able to utilize the DSP offload from the
Linux side.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
Changes in v2:
- Add more FastRPC context banks (6, 7)
- Link to v1: https://lore.kernel.org/r/20260113-agatti-fastrpc-v1-1-e210903ffcb1@oss.qualcomm.com
---
 arch/arm64/boot/dts/qcom/agatti.dtsi | 41 ++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/agatti.dtsi b/arch/arm64/boot/dts/qcom/agatti.dtsi
index 7815ece261ea..217d465df846 100644
--- a/arch/arm64/boot/dts/qcom/agatti.dtsi
+++ b/arch/arm64/boot/dts/qcom/agatti.dtsi
@@ -2287,6 +2287,47 @@ q6routing: routing {
 						};
 					};
 				};
+
+				fastrpc {
+					compatible = "qcom,fastrpc";
+					qcom,glink-channels = "fastrpcglink-apps-dsp";
+					label = "adsp";
+
+					qcom,non-secure-domain;
+
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					compute-cb@3 {
+						compatible = "qcom,fastrpc-compute-cb";
+						reg = <3>;
+						iommus = <&apps_smmu 0x1c3 0x0>;
+					};
+
+					compute-cb@4 {
+						compatible = "qcom,fastrpc-compute-cb";
+						reg = <4>;
+						iommus = <&apps_smmu 0x1c4 0x0>;
+					};
+
+					compute-cb@5 {
+						compatible = "qcom,fastrpc-compute-cb";
+						reg = <5>;
+						iommus = <&apps_smmu 0x1c5 0x0>;
+					};
+
+					compute-cb@6 {
+						compatible = "qcom,fastrpc-compute-cb";
+						reg = <6>;
+						iommus = <&apps_smmu 0x1c6 0x0>;
+					};
+
+					compute-cb@7 {
+						compatible = "qcom,fastrpc-compute-cb";
+						reg = <7>;
+						iommus = <&apps_smmu 0x1c7 0x0>;
+					};
+				};
 			};
 		};
 

---
base-commit: 0f853ca2a798ead9d24d39cad99b0966815c582a
change-id: 20260113-agatti-fastrpc-e3fe4bea2b42

Best regards,
-- 
With best wishes
Dmitry

Re: [PATCH v2] arm64: dts: qcom: agatti: enable FastRPC on the ADSP

[Konrad Dybcio]

On 1/13/26 5:41 PM, Dmitry Baryshkov wrote:
> On Agatti platform the ADSP provides FastRPC support. Add corresponding
> device node, in order to be able to utilize the DSP offload from the
> Linux side.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
> Changes in v2:
> - Add more FastRPC context banks (6, 7)
> - Link to v1: https://lore.kernel.org/r/20260113-agatti-fastrpc-v1-1-e210903ffcb1@oss.qualcomm.com
> ---

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

Konrad

Re: [PATCH v2] arm64: dts: qcom: agatti: enable FastRPC on the ADSP

[Bjorn Andersson]

On Tue, 13 Jan 2026 18:41:59 +0200, Dmitry Baryshkov wrote:
> On Agatti platform the ADSP provides FastRPC support. Add corresponding
> device node, in order to be able to utilize the DSP offload from the
> Linux side.
> 
> 

Applied, thanks!

[1/1] arm64: dts: qcom: agatti: enable FastRPC on the ADSP
      commit: 851d5ae6003b6517fb641675c33d4b529765fe14

Best regards,
-- 
Bjorn Andersson <andersson@kernel.org>

Re: [PATCH v2] arm64: dts: qcom: agatti: enable FastRPC on the ADSP

[Sumit Garg]

On Tue, Jan 13, 2026 at 06:41:59PM +0200, Dmitry Baryshkov wrote:
> On Agatti platform the ADSP provides FastRPC support. Add corresponding
> device node, in order to be able to utilize the DSP offload from the
> Linux side.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
> Changes in v2:
> - Add more FastRPC context banks (6, 7)
> - Link to v1: https://lore.kernel.org/r/20260113-agatti-fastrpc-v1-1-e210903ffcb1@oss.qualcomm.com
> ---
>  arch/arm64/boot/dts/qcom/agatti.dtsi | 41 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
>

This patch causes a critical boot regression on RB1 as per the CI test
report here [1]. I see this change already landed in this merge window.
So, either this commit has to be reverted for v7.0 release or an
appropriate fix is required.

[1] https://github.com/qualcomm-linux/kernel/issues/359

-Sumit

> diff --git a/arch/arm64/boot/dts/qcom/agatti.dtsi b/arch/arm64/boot/dts/qcom/agatti.dtsi
> index 7815ece261ea..217d465df846 100644
> --- a/arch/arm64/boot/dts/qcom/agatti.dtsi
> +++ b/arch/arm64/boot/dts/qcom/agatti.dtsi
> @@ -2287,6 +2287,47 @@ q6routing: routing {
>  						};
>  					};
>  				};
> +
> +				fastrpc {
> +					compatible = "qcom,fastrpc";
> +					qcom,glink-channels = "fastrpcglink-apps-dsp";
> +					label = "adsp";
> +
> +					qcom,non-secure-domain;
> +
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					compute-cb@3 {
> +						compatible = "qcom,fastrpc-compute-cb";
> +						reg = <3>;
> +						iommus = <&apps_smmu 0x1c3 0x0>;
> +					};
> +
> +					compute-cb@4 {
> +						compatible = "qcom,fastrpc-compute-cb";
> +						reg = <4>;
> +						iommus = <&apps_smmu 0x1c4 0x0>;
> +					};
> +
> +					compute-cb@5 {
> +						compatible = "qcom,fastrpc-compute-cb";
> +						reg = <5>;
> +						iommus = <&apps_smmu 0x1c5 0x0>;
> +					};
> +
> +					compute-cb@6 {
> +						compatible = "qcom,fastrpc-compute-cb";
> +						reg = <6>;
> +						iommus = <&apps_smmu 0x1c6 0x0>;
> +					};
> +
> +					compute-cb@7 {
> +						compatible = "qcom,fastrpc-compute-cb";
> +						reg = <7>;
> +						iommus = <&apps_smmu 0x1c7 0x0>;
> +					};
> +				};
>  			};
>  		};
>  
> 
> ---
> base-commit: 0f853ca2a798ead9d24d39cad99b0966815c582a
> change-id: 20260113-agatti-fastrpc-e3fe4bea2b42
> 
> Best regards,
> -- 
> With best wishes
> Dmitry
> 
> 

Re: [PATCH v2] arm64: dts: qcom: agatti: enable FastRPC on the ADSP

[Konrad Dybcio]

On 3/30/26 6:54 AM, Sumit Garg wrote:
> On Tue, Jan 13, 2026 at 06:41:59PM +0200, Dmitry Baryshkov wrote:
>> On Agatti platform the ADSP provides FastRPC support. Add corresponding
>> device node, in order to be able to utilize the DSP offload from the
>> Linux side.
>>
>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
>> ---
>> Changes in v2:
>> - Add more FastRPC context banks (6, 7)
>> - Link to v1: https://lore.kernel.org/r/20260113-agatti-fastrpc-v1-1-e210903ffcb1@oss.qualcomm.com
>> ---
>>  arch/arm64/boot/dts/qcom/agatti.dtsi | 41 ++++++++++++++++++++++++++++++++++++
>>  1 file changed, 41 insertions(+)
>>
> 
> This patch causes a critical boot regression on RB1 as per the CI test
> report here [1]. I see this change already landed in this merge window.
> So, either this commit has to be reverted for v7.0 release or an
> appropriate fix is required.
> 
> [1] https://github.com/qualcomm-linux/kernel/issues/359

Why has that issue been opened 2 weeks ago with no action since?

FWIW, copying the broader log from the LAVA job:


[[0;32m  OK  [0m] Reached target [0;1;39mBasic System[0m.
         Starting [0;1;39maDSP RPC daemon[0m...
         Starting [0;1;39maudiopd aDSP RPC daemon[0m...
         Starting [0;1;39mAndroid Debug Bridge[0m...
         Starting [0;1;39mAvahi mDNS/DNS-SD Stack[0m...
         Starting [0;1;39mBluetooth service[0m...
         Starting [0;1;39mD-Bus System Message Bus[0m...
[   17.318840] qcom,fastrpc-cb ab00000.remoteproc:glink-edge:fastrpc:compute-cb@4: mem mmap error, fd 11, vaddr ffffae380000, size 262144
[   17.327877] qcom_q6v5_pas ab00000.remoteproc: fatal error received: SFR Init: wdog or kernel error suspected.
[   17.343248] remoteproc remoteproc1: crash detected in adsp: type fatal error
[   17.350567] qcom_q6v5_pas ab00000.remoteproc: Handover signaled, but it already happened
[   17.358869] remoteproc remoteproc1: handling crash #1 in adsp
[   17.364730] remoteproc remoteproc1: recovering adsp

Format: Log Type - Time(microsec) - Message - Optional Info
Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
<ded>

It seems like this only ends up being a problem once the userland
daemon starting poking at the channel - +Ekansh, have you seen this
before?

Konrad