linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sm8550: correct TX Soundwire clock

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Date:   Thu, 30 Nov 2023 10:17:50 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sm8550: correct TX Soundwire clock

On 30/11/2023 09:06, Krzysztof Kozlowski wrote:
> On 29/11/2023 15:35, Konrad Dybcio wrote:
>> On 29.11.2023 15:05, Krzysztof Kozlowski wrote:
>>> The TX Soundwire controller should take clock from TX macro codec, not
>>> VA macro codec clock, otherwise the clock stays disabled.  This looks
>>> like a copy-paste issue, because the SC8280xp code uses here correctly
>>> clock from TX macro.  The VA macro clock is already consumed by TX macro
>>> codec, thus it won't be disabled by this change.
>>>
>>> Fixes: 61b006389bb7 ("arm64: dts: qcom: sm8550: add Soundwire controllers")
>>> Reported-by: Neil Armstrong <neil.armstrong@...aro.org>
>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>>> ---
>> Interestingly, downstream 8550 has
>>
>> qcom,use-clk-id = <VA_CORE_CLK>;
>>
>> which doesn't seem to be used in techpack
> 
> In which node? I see it in the va-macro node, not the tx-macro.

Same I only see this in the va_macro.

Neil

> 
> Best regards,
> Krzysztof
>