linux-kernel - Re: [PATCH 2/5] dt-bindings: sound: qcom,sm8250: add RB1 (QCM2290) soundcard

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Message-Id: <DD69D3NF9QWG.3NJDD1L5EQFMF@linaro.org>
Date: Tue, 30 Sep 2025 16:59:46 +0100
From: "Alexey Klimov" <alexey.klimov@...aro.org>
To: <dmitry.baryshkov@....qualcomm.com>
Cc: "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>,
 "Konrad Dybcio" <konradybcio@...nel.org>, "Liam Girdwood"
 <lgirdwood@...il.com>, "Mark Brown" <broonie@...nel.org>,
 <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <linux-sound@...r.kernel.org>,
 <srini@...nel.org>
Subject: Re: [PATCH 2/5] dt-bindings: sound: qcom,sm8250: add RB1 (QCM2290)
 soundcard

(update emails, drop old ones)

On Sun Mar 2, 2025 at 8:20 AM GMT, Dmitry Baryshkov wrote:
> On Sun, Mar 02, 2025 at 02:49:52AM +0000, Alexey Klimov wrote:
>> Add soundcard compatible for the soundcard on QRB2210 RB1 platform,
>> which at this point seems to be compatible with soundcard on
>> QRB4210 RB2 platform.
>
> Is it? The RB1 uses PM4125 for audio output, while RB2 uses WCD codec.

That's correct. I also managed to enable hdmi audio, vamacro dmic and
pm4125 line out output keeping it all compatible with qrb4210-rb2-sndcard.

Things are mostly the same between RB1 and RB2 apart from last stage
in the output and analog inputs (non-HDMI and not dmics). The diff can
be described in board-specific device tree, amixer's control commands
and model property.

Is it still need new separate compatible "qcom,qrb2210-rb1-sndcard"?

Thanks,
Alexey

>> Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
>> ---
>>  Documentation/devicetree/bindings/sound/qcom,sm8250.yaml | 4 ++++
>>  1 file changed, 4 insertions(+)
>> 
>> diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
>> index b9e33a7429b0c063dc5f5b806925cd541e546cf6..2493ed99268bf2ff8343020150c2c9aca4262514 100644
>> --- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
>> +++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
>> @@ -21,6 +21,10 @@ properties:
>>                - lenovo,yoga-c630-sndcard
>>                - qcom,db845c-sndcard
>>            - const: qcom,sdm845-sndcard
>> +      - items:
>> +          - enum:
>> +              - qcom,qrb2210-rb1-sndcard
>> +          - const: qcom,qrb4210-rb2-sndcard
>>        - items:
>>            - enum:
>>                - qcom,sm8550-sndcard
>> 
>> -- 
>> 2.47.2
>>