linux-kernel - Re: [PATCH 1/2] arm64: dts: qcom: sdm630/660: Add CDSP-related nodes

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Message-ID: <0ca0bdfe-b228-49be-9ef7-71482d372e0f@mainlining.org>
Date: Mon, 20 Oct 2025 18:42:59 +0300
From: Nickolay Goppen <setotau@...nlining.org>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: 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>, 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 1/2] arm64: dts: qcom: sdm630/660: Add CDSP-related nodes


20.10.2025 18:27, Nickolay Goppen пишет:
>
> 20.10.2025 16:14, Dmitry Baryshkov пишет:
>> On Sun, Oct 19, 2025 at 07:27:06PM +0300, 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>
>>> ---
>>>   arch/arm64/boot/dts/qcom/sdm630.dtsi |   2 +-
>>>   arch/arm64/boot/dts/qcom/sdm636.dtsi |  14 ++++
>>>   arch/arm64/boot/dts/qcom/sdm660.dtsi | 152 
>>> +++++++++++++++++++++++++++++++++++
>>>   3 files changed, 167 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sdm630.dtsi 
>>> b/arch/arm64/boot/dts/qcom/sdm630.dtsi
>>> index 8b1a45a4e56e..a6a1933229b9 100644
>>> --- a/arch/arm64/boot/dts/qcom/sdm630.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/sdm630.dtsi
>>> @@ -563,7 +563,7 @@ modem_smp2p_in: slave-kernel {
>>>           };
>>>       };
>>>   -    soc@0 {
>>> +    soc: soc@0 {
>>>           #address-cells = <1>;
>>>           #size-cells = <1>;
>>>           ranges = <0 0 0 0xffffffff>;
>>> diff --git a/arch/arm64/boot/dts/qcom/sdm636.dtsi 
>>> b/arch/arm64/boot/dts/qcom/sdm636.dtsi
>>> index ae15d81fa3f9..41e4e97f7747 100644
>>> --- a/arch/arm64/boot/dts/qcom/sdm636.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/sdm636.dtsi
>>> @@ -16,6 +16,20 @@
>>>    * be addressed when the aforementioned
>>>    * peripherals will be enabled upstream.
>>>    */
>>> +/delete-node/ &cdsp_pil;
>>> +/delete-node/ &cdsp_smmu;
>>> +/delete-node/ &cdsp_region;
>>> +
>>> +/ {
>>> +    /delete-node/ smp2p-cdsp;
>>> +
>>> +    reserved-memory {
>>> +        buffer_mem: tzbuffer@...00000 {
>>> +            reg = <0x00 0x94a00000 0x00 0x100000>;
>>> +            no-map;
>>> +        };
>>> +    };
>>> +};
>> This probably means that we need to invert things and make SDM636
>> inherit SDM630 and SDM660 inherit SDM636. Would you mind doing that as a
>> part of this patchset?
> I'd mind
Konrad decided to do the split this way for some reason initially
>>>     &adreno_gpu {
>>>       compatible = "qcom,adreno-509.0", "qcom,adreno";
>
-- 
Best regards,
Nickolay