Re: [PATCH] arm64: dts: qcom: kodiak: increase fastrpc compute-cb session slots

[Jianping Li <jianping.li@oss.qualcomm.com>]

On 4/1/2026 7:33 PM, Dmitry Baryshkov wrote:
> On Wed, Apr 01, 2026 at 03:33:45PM +0800, Jianping Li wrote:
>> Some workloads on Kodiak can exhaust FastRPC sessions when multiple
>> compute clients open contexts concurrently, leading to -EBUSY failures.
>>
>> Describe the compute context bank with qcom,nsessions = <5> so the
>> driver can provision enough session slots for the compute-cb instance.
> This is a software property, so it probably should not have been added
> to the DT in the first place. Can we replace it with the driver code,
> allocating more sessions to the last CB?

Thank you for your suggestion. I will check the methods you mentioned.

Thanks,
Jianping.

>
>> Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/kodiak.dtsi | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/kodiak.dtsi b/arch/arm64/boot/dts/qcom/kodiak.dtsi
>> index 6079e67ea829..5bd20909f9db 100644
>> --- a/arch/arm64/boot/dts/qcom/kodiak.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/kodiak.dtsi
>> @@ -4465,6 +4465,7 @@ compute-cb@5 {
>>   						compatible = "qcom,fastrpc-compute-cb";
>>   						reg = <5>;
>>   						iommus = <&apps_smmu 0x1805 0x0>;
>> +						qcom,nsessions = <5>;
>>   						dma-coherent;
>>   					};
>>   				};
>> -- 
>> 2.43.0
>>