linux-kernel - Re: [PATCH 07/11] Documentation: dt-bindings: sound: Add details for new dai properties

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Date:   Thu, 16 Apr 2020 08:56:39 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Ajit Pandey <ajitp@...eaurora.org>, alsa-devel@...a-project.org,
        broonie@...nel.org, devicetree@...r.kernel.org,
        plai@...eaurora.org, bgoswami@...eaurora.org
Cc:     linux-kernel@...r.kernel.org, tiwai@...e.com, stephan@...hold.net
Subject: Re: [PATCH 07/11] Documentation: dt-bindings: sound: Add details for
 new dai properties



On 11/04/2020 09:02, Ajit Pandey wrote:
> Add changes related to new sub node defining MI2S dai's properties. Such
> properties needs to be configured via board specific dts files.
> 
+Adding Stephan Gerlhold

Have a look at https://www.spinics.net/lists/alsa-devel/msg107224.html 
patches from Stephan Gerlhold which has better version of specifying sd 
line mask and is inline with DSP based solution too.

--srini

> Signed-off-by: Ajit Pandey <ajitp@...eaurora.org>
> ---
>   .../devicetree/bindings/sound/qcom,lpass-cpu.yaml  | 33 ++++++++++++++++++++++
>   1 file changed, 33 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml
> index a87a406..727ec03 100644
> --- a/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml
> +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml
> @@ -16,6 +16,8 @@ description: |
>     configure Low-Power Audio Interface(LPAIF) core registers across different
>     IP versions.
>   
> +  See also dt-bindings/sound/qcom,lpass.h.
> +
>   properties:
>     compatible:
>       enum:
> @@ -69,6 +71,30 @@ properties:
>     '#sound-dai-cells':
>       const: 1
>   
> +  dai-name:
> +    - description: Each node represents an MI2S dai and conatins dai specific
> +        properties that may change with board layout & dai connections.
> +    - type: object
> +    - properties:
> +      id:
> +        - description: dai id among one of value defined in header
> +        - type: u32
> +      qcom,spkmode-mask:
> +        - description: mask defining data lines used for speaker
> +        - type: u32
> +      qcom,micmode-mask:
> +        - description: mask defining data lines used for mic
> +        - type: u32
> +      qcom,wssrc-mask:
> +        - description: mask defining word-select source internal/extrnal on dai
> +        - type: u32
> +      qcom,loopback-mask:
> +        - description: mask defining loopback enable/disable on dai
> +        - type: u32
> +
> +      required:
> +        - id
> +
>   required:
>     - compatible
>     - reg
> @@ -101,3 +127,10 @@ examples:
>   	#sound-dai-cells = <1>;
>   	qcom,adsp = <&adsp>;
>   
> +        prim-mi2s@0 {
> +		id = <MI2S_PRIMARY>;
> +		qcom,spkmode-mask = <SD1>;
> +		qcom,micmode-mask = <SD0>;
> +                qcom,wssrc-mask = <INTERNAL>;
> +                qcom,loopback-mask = <DISABLE>;
> +	};
>