linux-kernel - Re: [PATCH 02/18] ASoC: dt-bindings: mediatek,mt8365-mt6357: Add audio sound card document

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Message-ID: <16739065-4187-4e51-b7f0-4a55de101744@linaro.org>
Date: Tue, 27 Feb 2024 10:06:40 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Alexandre Mergnat <amergnat@...libre.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
 <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Lee Jones <lee@...nel.org>, Flora Fu <flora.fu@...iatek.com>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 Sumit Semwal <sumit.semwal@...aro.org>,
 Christian König <christian.koenig@....com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, linux-media@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH 02/18] ASoC: dt-bindings: mediatek,mt8365-mt6357: Add
 audio sound card document

On 26/02/2024 15:01, Alexandre Mergnat wrote:
> Add soundcard bindings for the MT8365 SoC with the MT6357 audio codec.
> 
> Signed-off-by: Alexandre Mergnat <amergnat@...libre.com>
> ---
>  .../bindings/sound/mediatek,mt8365-mt6357.yaml     | 127 +++++++++++++++++++++
>  1 file changed, 127 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt8365-mt6357.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt8365-mt6357.yaml
> new file mode 100644
> index 000000000000..f469611ec6b6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/mediatek,mt8365-mt6357.yaml
> @@ -0,0 +1,127 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/mediatek,mt8365-mt6357.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek MT8365 sound card with MT6357 sound codec.

Drop full stop. This is title.

> +
> +maintainers:
> +  - Alexandre Mergnat <amergnat@...libre.com>
> +
> +description:
> +  This binding describes the MT8365 sound card.

Say something useful. There is no need to say that binding is a binding
describing something. Or just drop it if this is obvious.


> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8365-mt6357
> +
> +  mediatek,hp-pull-down:
> +    description:
> +      Earphone driver positive output stage short to the
> +      audio reference ground.
> +      Default value is false.

That's obvious, isn't it? Drop.

> +    type: boolean
> +
> +  mediatek,micbias0-microvolt:
> +    description: |
> +      Selects MIC Bias 0 output voltage.
> +      [1.7v, 1.8v, 1.9v, 2.0v, 2.1v, 2.5v, 2.6v, 2.7v]
> +    enum: [0, 1, 2, 3, 4, 5, 6, 7]

0 is 0V, not 1.7! That's total mess. You use here microvolts. Look at
property name.

> +
> +  mediatek,micbias1-microvolt:
> +    description: |
> +      Selects MIC Bias 1 output voltage.
> +      [1.7v, 1.8v, 1.9v, 2.0v, 2.1v, 2.5v, 2.6v, 2.7v]
> +    enum: [0, 1, 2, 3, 4, 5, 6, 7]
> +
> +  mediatek,platform:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: The phandle of MT8365 ASoC platform.
> +
> +  pinctrl-names:
> +    minItems: 1
> +    items:
> +      - const: aud_default

Drop redundant parts. aud looks like block name.

> +      - const: aud_dmic
> +      - const: aud_miso_off
> +      - const: aud_miso_on
> +      - const: aud_mosi_off
> +      - const: aud_mosi_on
> +
> +  vaud28-supply:
> +    description:
> +      2.8 volt supply for the audio codec
> +
> +patternProperties:
> +  "^dai-link-[0-9]+$":
> +    type: object
> +    description:
> +      Container for dai-link level properties and CODEC sub-nodes.
> +
> +    properties:
> +      codec:
> +        type: object
> +        description: Holds subnode which indicates codec dai.
> +
> +        properties:
> +          sound-dai:
> +            maxItems: 1
> +            description: phandle of the codec DAI
> +
> +        additionalProperties: false
> +
> +      link-name:
> +        description:
> +          This property corresponds to the name of the BE dai-link to which
> +          we are going to update parameters in this node.
> +        items:
> +          const: 2ND I2S BE
> +
> +      sound-dai:
> +        maxItems: 1
> +        description: phandle of the CPU DAI
> +
> +    additionalProperties: false
> +
> +    required:
> +      - link-name
> +      - sound-dai
> +
> +additionalProperties: false

This goes after required: block. See example schema.

> +
> +required:
> +  - compatible
> +  - mediatek,platform
> +  - pinctrl-names
> +  - vaud28-supply
> +


Best regards,
Krzysztof