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From:   Jerome Brunet <jbrunet@baylibre.com>
To:     Rob Herring <robh@kernel.org>, Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>,
        NXP Linux Team <linux-imx@nxp.com>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        Sylwester Nawrocki <s.nawrocki@samsung.com>,
        Rohit kumar <rohitkr@codeaurora.org>,
        Cheng-Yi Chiang <cychiang@chromium.org>,
        Shengjiu Wang <shengjiu.wang@nxp.com>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Jonathan Bakker <xc-racer2@live.ca>
Cc:     Krzysztof Kozlowski <krzk@kernel.org>, alsa-devel@alsa-project.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH] ASoC: dt-bindings: Centralize the 'sound-dai' definition
Date:   Thu, 27 Jan 2022 10:00:53 +0100
In-reply-to: <20220126231427.1638089-1-robh@kernel.org>
Message-ID: <1jtudp1rc1.fsf@starbuckisacylon.baylibre.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk


On Wed 26 Jan 2022 at 17:14, Rob Herring <robh@kernel.org> wrote:

> 'sound-dai' is a common property, but has duplicate type definitions.
> Create a new common definition to define the type and then update all
> the other occurrences to just define how many entries there are just
> like other phandle+arg properties.
>
> The constraints on the number of entries is based on the examples and
> could be wrong.
>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> Please ack, this depends on commit abf0fee97313 ("dt-bindings: Improve
> phandle-array schemas") in my tree.
> ---
>  .../bindings/sound/amlogic,gx-sound-card.yaml |  4 ++--
>  .../bindings/sound/google,sc7180-trogdor.yaml |  6 ++++--
>  .../bindings/sound/imx-audio-card.yaml        |  7 +++++--
>  .../bindings/sound/qcom,sm8250.yaml           | 10 +++++++---
>  .../bindings/sound/samsung,aries-wm8994.yaml  |  5 +----
>  .../bindings/sound/samsung,midas-audio.yaml   |  2 --
>  .../bindings/sound/samsung,odroid.yaml        |  9 +++------
>  .../devicetree/bindings/sound/sound-dai.yaml  | 20 +++++++++++++++++++
>  8 files changed, 42 insertions(+), 21 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/sound/sound-dai.yaml
>
> diff --git a/Documentation/devicetree/bindings/sound/amlogic,gx-sound-card.yaml b/Documentation/devicetree/bindings/sound/amlogic,gx-sound-card.yaml
> index 2e35aeaa8781..8b5be4b92f35 100644
> --- a/Documentation/devicetree/bindings/sound/amlogic,gx-sound-card.yaml
> +++ b/Documentation/devicetree/bindings/sound/amlogic,gx-sound-card.yaml
> @@ -57,7 +57,7 @@ patternProperties:
>            rate
>  
>        sound-dai:
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
> +        maxItems: 1
>          description: phandle of the CPU DAI
>  
>      patternProperties:
> @@ -71,7 +71,7 @@ patternProperties:
>  
>          properties:
>            sound-dai:
> -            $ref: /schemas/types.yaml#/definitions/phandle-array
> +            maxItems: 1

No min or max here. Links may have more than one codec.

Ex:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts#n158

>              description: phandle of the codec DAI
>  
>          required:
> diff --git a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> index 837e3faa63a9..233caa0ade87 100644
> --- a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> +++ b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> @@ -62,13 +62,15 @@ patternProperties:
>          description: Holds subnode which indicates cpu dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            maxItems: 1
>  
>        codec:
>          description: Holds subnode which indicates codec dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            maxItems: 1
>  
>      required:
>        - link-name
> diff --git a/Documentation/devicetree/bindings/sound/imx-audio-card.yaml b/Documentation/devicetree/bindings/sound/imx-audio-card.yaml
> index d1816dd061cf..bb3a435722c7 100644
> --- a/Documentation/devicetree/bindings/sound/imx-audio-card.yaml
> +++ b/Documentation/devicetree/bindings/sound/imx-audio-card.yaml
> @@ -59,13 +59,16 @@ patternProperties:
>          description: Holds subnode which indicates cpu dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            maxItems: 1
>  
>        codec:
>          description: Holds subnode which indicates codec dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            minItems: 1
> +            maxItems: 2
>  
>        fsl,mclk-equal-bclk:
>          description: Indicates mclk can be equal to bclk, especially for sai interface
> diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
> index 4bfda04b4608..4ecd4080bb96 100644
> --- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
> +++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
> @@ -69,19 +69,23 @@ patternProperties:
>          description: Holds subnode which indicates cpu dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            maxItems: 1
>  
>        platform:
>          description: Holds subnode which indicates platform dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            maxItems: 1
>  
>        codec:
>          description: Holds subnode which indicates codec dai.
>          type: object
>          properties:
> -          sound-dai: true
> +          sound-dai:
> +            minItems: 1
> +            maxItems: 4
>  
>      required:
>        - link-name
> diff --git a/Documentation/devicetree/bindings/sound/samsung,aries-wm8994.yaml b/Documentation/devicetree/bindings/sound/samsung,aries-wm8994.yaml
> index eb487ed3ca3b..4ffa275b3c49 100644
> --- a/Documentation/devicetree/bindings/sound/samsung,aries-wm8994.yaml
> +++ b/Documentation/devicetree/bindings/sound/samsung,aries-wm8994.yaml
> @@ -27,9 +27,6 @@ properties:
>        sound-dai:
>          minItems: 2
>          maxItems: 2
> -        items:
> -          maxItems: 1
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
>          description: |
>            phandles to the I2S controller and bluetooth codec,
>            in that order
> @@ -38,7 +35,7 @@ properties:
>      type: object
>      properties:
>        sound-dai:
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
> +        maxItems: 1
>          description: phandle to the WM8994 CODEC
>  
>    samsung,audio-routing:
> diff --git a/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml b/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml
> index 095775c598fa..ec50bcb4af5f 100644
> --- a/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml
> +++ b/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml
> @@ -21,7 +21,6 @@ properties:
>      type: object
>      properties:
>        sound-dai:
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
>          maxItems: 1
>          description: phandle to the I2S controller
>      required:
> @@ -31,7 +30,6 @@ properties:
>      type: object
>      properties:
>        sound-dai:
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
>          maxItems: 1
>          description: phandle to the WM1811 CODEC
>      required:
> diff --git a/Documentation/devicetree/bindings/sound/samsung,odroid.yaml b/Documentation/devicetree/bindings/sound/samsung,odroid.yaml
> index e8122bc87362..db2513f3e168 100644
> --- a/Documentation/devicetree/bindings/sound/samsung,odroid.yaml
> +++ b/Documentation/devicetree/bindings/sound/samsung,odroid.yaml
> @@ -37,18 +37,15 @@ properties:
>      type: object
>      properties:
>        sound-dai:
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
>          description: phandles to the I2S controllers
>  
>    codec:
>      type: object
>      properties:
>        sound-dai:
> -        $ref: /schemas/types.yaml#/definitions/phandle-array
> -        description: |
> -          List of phandles to the CODEC nodes,
> -          first entry must be corresponding to the MAX98090 CODEC and
> -          the second entry must be the phandle of the HDMI IP block node.
> +        items:
> +          - description: phandle of the MAX98090 CODEC
> +          - description: phandle of the HDMI IP block node
>  
>    samsung,audio-routing:
>      $ref: /schemas/types.yaml#/definitions/non-unique-string-array
> diff --git a/Documentation/devicetree/bindings/sound/sound-dai.yaml b/Documentation/devicetree/bindings/sound/sound-dai.yaml
> new file mode 100644
> index 000000000000..61c6f7abc4e7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/sound-dai.yaml
> @@ -0,0 +1,20 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/sound-dai.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Digital Audio Interface consumer Device Tree Bindings
> +
> +maintainers:
> +  - Rob Herring <robh@kernel.org>
> +
> +select: true
> +
> +properties:
> +  sound-dai:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: A phandle plus args to digital audio interface provider(s)
> +
> +additionalProperties: true
> +...