linux-kernel - Re: [PATCH v4 2/8] ASoC: dt-bindings: qcom: Manage clock settings for ADSP solution

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Message-ID: <13b9cbec-3d7a-4deb-b356-685e73fdf2f1@quicinc.com>
Date: Sun, 1 Jun 2025 18:15:07 +0530
From: Prasad Kumpatla <quic_pkumpatl@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Srinivas Kandagatla <srini@...nel.org>,
        Liam Girdwood
	<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>
CC: <cros-qcom-dts-watchers@...omium.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-sound@...r.kernel.org>,
        <kernel@....qualcomm.com>, Mohammad Rafi Shaik <quic_mohs@...cinc.com>
Subject: Re: [PATCH v4 2/8] ASoC: dt-bindings: qcom: Manage clock settings for
 ADSP solution



On 5/27/2025 5:28 PM, Krzysztof Kozlowski wrote:
> On 27/05/2025 13:12, Prasad Kumpatla wrote:
>> From: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
>>
>> Manage clock settings for ADSP solution and document the clock properties
>> on sc7280 lpass pincontrol node which is required for ADSP based
>> solution.
>>
>> Signed-off-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
>> Co-developed-by: Prasad Kumpatla <quic_pkumpatl@...cinc.com>
>> Signed-off-by: Prasad Kumpatla <quic_pkumpatl@...cinc.com>
>> ---
> 
> Nothing in cover letter explained what was happening with this patch.
> Provide changelog under --- in such case.

Ack, Will provide more info on commit text.

> 
>>   .../qcom,sc7280-lpass-lpi-pinctrl.yaml        | 10 ++++++++
>>   .../bindings/sound/qcom,lpass-va-macro.yaml   | 12 +++++++---
>>   .../bindings/sound/qcom,lpass-wsa-macro.yaml  | 24 ++++++++++++++++---
> 
> Split patches per subsystem. Pinctrl is not ASoC.

Ack

> 
>>   3 files changed, 40 insertions(+), 6 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,sc7280-lpass-lpi-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,sc7280-lpass-lpi-pinctrl.yaml
>> index 08801cc4e476..b1270124bfe3 100644
>> --- a/Documentation/devicetree/bindings/pinctrl/qcom,sc7280-lpass-lpi-pinctrl.yaml
>> +++ b/Documentation/devicetree/bindings/pinctrl/qcom,sc7280-lpass-lpi-pinctrl.yaml
>> @@ -20,6 +20,16 @@ properties:
>>     reg:
>>       maxItems: 2
>>   
>> +  clocks:
>> +    items:
>> +      - description: LPASS Core voting clock
>> +      - description: LPASS Audio voting clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: core
>> +      - const: audio
>> +
>>   patternProperties:
>>     "-state$":
>>       oneOf:
>> diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-va-macro.yaml b/Documentation/devicetree/bindings/sound/qcom,lpass-va-macro.yaml
>> index f41deaa6f4df..92b97c214060 100644
>> --- a/Documentation/devicetree/bindings/sound/qcom,lpass-va-macro.yaml
>> +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-va-macro.yaml
>> @@ -78,10 +78,16 @@ allOf:
>>       then:
>>         properties:
>>           clocks:
>> -          maxItems: 1
>> +          minItems: 1
>> +          maxItems: 3
>>           clock-names:
>> -          items:
>> -            - const: mclk
>> +          oneOf:
>> +            - items:   # for ADSP based platforms
>> +                - const: mclk
>> +                - const: macro
>> +                - const: dcodec
>> +            - items:   # for ADSP bypass based platforms
>> +                - const: mclk
> 
> This device always receives same amount of clocks. Hardware is not
> different if you decide to not use ADSP.
for sc7280 clock handling only supports non-DSP based solution, macro
and dcodec votes are placed using CPU-Powerdomains. Which are not under
clocking properties. In ADSP based platforms macro and dcodec votes 
should be placed from ADSP.>
>>   
>>     - if:
>>         properties:
>> diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-wsa-macro.yaml b/Documentation/devicetree/bindings/sound/qcom,lpass-wsa-macro.yaml
>> index 9082e363c709..6a999ed484e7 100644
>> --- a/Documentation/devicetree/bindings/sound/qcom,lpass-wsa-macro.yaml
>> +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-wsa-macro.yaml
>> @@ -35,11 +35,11 @@ properties:
>>       const: 0
>>   
>>     clocks:
>> -    minItems: 4
>> +    minItems: 3
>>       maxItems: 6
>>   
>>     clock-names:
>> -    minItems: 4
>> +    minItems: 3
>>       maxItems: 6
>>   
>>     clock-output-names:
>> @@ -59,12 +59,30 @@ required:
>>   
>>   allOf:
>>     - $ref: dai-common.yaml#
>> -
>>     - if:
>>         properties:
>>           compatible:
>>             enum:
>>               - qcom,sc7280-lpass-wsa-macro
>> +    then:
>> +      properties:
>> +        clock-names:
>> +          oneOf:
>> +            - items:   # for ADSP based platforms
>> +                - const: mclk
>> +                - const: npl
>> +                - const: macro
>> +                - const: dcodec
>> +                - const: fsgen
>> +            - items:   # for ADSP bypass based platforms
>> +                - const: mclk
>> +                - const: npl
>> +                - const: fsgen
> 
> This silently breaks ABI. Third clock is macro.

Ack, will check and update.

Thanks,
Prasad>
> 
> Best regards,
> Krzysztof