linux-kernel - Re: [PATCH] dt-bindings: dma: qcom,bam-dma: add optional memory interconnect properties

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Message-ID: <a8112f61-f8d3-c1e0-9549-a9036a7e7894@linaro.org>
Date:   Tue, 7 Feb 2023 14:35:48 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: dma: qcom,bam-dma: add optional memory
 interconnect properties

On 07/02/2023 11:32, Dmitry Baryshkov wrote:
> On 07/02/2023 12:03, Neil Armstrong wrote:
>> Recents SoCs like the SM8450 or SM8550 requires memory interconnect
>> in order to have functional DMA.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>> ---
>>   Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml | 6 ++++++
>>   1 file changed, 6 insertions(+)
> 
> I suspect this will not work without a change for a driver.
> 

I had the impression single interconnect entries would be taken in account
by the platform core, but it doesn't seem to be the case, anyway I can;t find
any code doing that.

I'll resend with a driver change.

Neil