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

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Message-ID: <zat4n5izoh2qok4vojbgnofpy3q4wxdaw34ekniznlpzlb4zli@wsupvkcxmnol>
Date: Tue, 30 Sep 2025 21:44:52 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Alexey Klimov <alexey.klimov@...aro.org>
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

On Tue, Sep 30, 2025 at 04:59:46PM +0100, Alexey Klimov wrote:
> (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"?

If I were to follow other examples in this file, it should be
"qcom,qrb2210-rb1-sndcard", "qcom,qrb2210-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
> >> 
> 

-- 
With best wishes
Dmitry