Re: [RFC PATCH 1/5] dt-bindings: sound: Add Apple Macs sound system

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> On 31. 3. 2022, at 10:17, Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> wrote:
> 
> On 31/03/2022 08:57, Martin Povišer wrote:
>> 
>>> On 31. 3. 2022, at 8:43, Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> wrote:
>>> 
>>> On 31/03/2022 02:04, Martin Povišer wrote:
>>>> Add binding for Apple Silicon Macs' machine-level sound system.
>>>> 
>>>> Signed-off-by: Martin Povišer <povik+lin@xxxxxxxxxxx>
>>>> ---
>>>> .../bindings/sound/apple,macaudio.yaml        | 103 ++++++++++++++++++
>>>> 1 file changed, 103 insertions(+)
>>>> create mode 100644 Documentation/devicetree/bindings/sound/apple,macaudio.yaml
>>>> 
>>> 
>>> Commit title does not match subsystem.
>> 
>> Tell more please. I don’t see it.
> 
> git log --oneline  -- Documentation/devicetree/bindings/sound/
> 
> 
> Mark expects "ASoC: dt-bindings:"

Aha! Thanks.

>>>> diff --git a/Documentation/devicetree/bindings/sound/apple,macaudio.yaml b/Documentation/devicetree/bindings/sound/apple,macaudio.yaml
>>>> new file mode 100644
>>>> index 000000000000..a6380e4bdd1a
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/sound/apple,macaudio.yaml
>>>> @@ -0,0 +1,103 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/sound/apple,macaudio.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Apple Silicon Macs integrated sound system
>>>> +
>>>> +maintainers:
>>>> +  - Martin Povišer <povik+lin@xxxxxxxxxxx>
>>>> +
>>> 
>>> Add description.
>>> 
>>>> +definitions:
>>> 
>>> This does not make code more readable.
>> 
>> Are you sure? It prevents duplication later on for ‘codec' and ‘cpu’.
> 
> That's true, but duplication is small, unless you think this will be
> extended. I guess it is a trade-off, but so far for few lines and just
> two users of such definition, I would prefer to duplicate. I don't have
> strong opinion, though.

OK

>> 
>>> 
>>>> +        $ref: /schemas/types.yaml#/definitions/uint32
>>>> +      link-name:
>>>> +        description: Name for the DAI link to present to users.
>>>> +        $ref: /schemas/types.yaml#/definitions/string
>>>> +      cpu:
>>>> +        $ref: "#/definitions/dai"
>>>> +      codec:
>>>> +        $ref: "#/definitions/dai"
>>> 
>>> missing maxItems for DAI phandles.
>> 
>> Well there’s not a maximum.
> 
> There should be some maximum of supported codecs. Hardware might have
> such constraints. If really unsure, choose some reasonable (small)
> amount. It could be later raised, if needed.

There are some constraints but technically not in the driver that binds
on this binding. I thought no limit is better than an arbitrary one, but
if the preference is to have one, I will add it, no problem.

> Best regards,
> Krzysztof

Best,
Martin





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