linux-kernel - Re: [PATCH v2 1/3] arm64: dts: qcom: sdm630/660: Add CDSP-related nodes

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Message-ID: <83c3aea5-764e-4e60-8b16-67b474f19357@oss.qualcomm.com>
Date: Mon, 3 Nov 2025 13:52:21 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Nickolay Goppen <setotau@...nlining.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        linux@...nlining.org
Subject: Re: [PATCH v2 1/3] arm64: dts: qcom: sdm630/660: Add CDSP-related
 nodes

On 10/31/25 12:30 PM, Nickolay Goppen wrote:
> 
> 24.10.2025 16:58, Nickolay Goppen пишет:
>>
>> 24.10.2025 11:28, Konrad Dybcio пишет:
>>> On 10/23/25 9:51 PM, Nickolay Goppen wrote:
>>>> In order to enable CDSP support for SDM660 SoC:
>>>>   * add shared memory p2p nodes for CDSP
>>>>   * add CDSP-specific smmu node
>>>>   * add CDSP peripheral image loader node
>>>>
>>>> Memory region for CDSP in SDM660 occupies the same spot as
>>>> TZ buffer mem defined in sdm630.dtsi (which does not have CDSP).
>>>> In sdm660.dtsi replace buffer_mem inherited from SDM630 with
>>>> cdsp_region, which is also larger in size.
>>>>
>>>> SDM636 also doesn't have CDSP, so remove inherited from sdm660.dtsi
>>>> related nodes and add buffer_mem back.
>>>>
>>>> Signed-off-by: Nickolay Goppen <setotau@...nlining.org>
>>>> ---
>>> [...]
>>>
>>>> +            label = "turing";
>>> "cdsp"
>> Ok, I'll change this in the next revision.
>>>> +            mboxes = <&apcs_glb 29>;
>>>> +            qcom,remote-pid = <5>;
>>>> +
>>>> +            fastrpc {
>>>> +                compatible = "qcom,fastrpc";
>>>> +                qcom,glink-channels = "fastrpcglink-apps-dsp";
>>>> +                label = "cdsp";
>>>> +                qcom,non-secure-domain;
>>> This shouldn't matter, both a secure and a non-secure device is
>>> created for CDSP
>> I've added this property, because it is used in other SoC's, such as SDM845 and SM6115 for both ADSP and CDSP
> Is this property not neccessary anymore?

+Srini?

Konrad