linux-kernel - Re: [PATCH v2 4/4] ASoC: dt-bindings: ti,ts3a227e.yaml: add jack-type

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Date:   Mon, 23 Jan 2023 10:05:13 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Astrid Rost <astridr@...s.com>, Astrid Rost <astrid.rost@...s.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Dylan Reid <dgreid@...omium.org>
Cc:     kernel@...s.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 4/4] ASoC: dt-bindings: ti,ts3a227e.yaml: add jack-type

On 23/01/2023 09:39, Astrid Rost wrote:
> Hello Krzysztof,
> 
> On 1/22/23 15:16, Krzysztof Kozlowski wrote:
>> On 20/01/2023 11:25, Astrid Rost wrote:
>>> Add jack-type: Bitmap value of snd_jack_type to allow combining
>>> card drivers to create a jack for it.
>>
>> Subject: drop "yaml". We do not filename extensions to subject prefix.
>> Nowhere.
>>
> 
> yes, true.
> 
>>>
>>> Signed-off-by: Astrid Rost <astrid.rost@...s.com>
>>> ---
>>>   Documentation/devicetree/bindings/sound/ti,ts3a227e.yaml | 8 ++++++++
>>>   1 file changed, 8 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/sound/ti,ts3a227e.yaml b/Documentation/devicetree/bindings/sound/ti,ts3a227e.yaml
>>> index 785930658029..1d949b805f98 100644
>>> --- a/Documentation/devicetree/bindings/sound/ti,ts3a227e.yaml
>>> +++ b/Documentation/devicetree/bindings/sound/ti,ts3a227e.yaml
>>> @@ -27,6 +27,14 @@ properties:
>>>     interrupts:
>>>       maxItems: 1
>>>   
>>> +  jack-type:
>>> +    $ref: /schemas/types.yaml#/definitions/uint32
>>> +    description: Bitmap value of snd_jack_type to allow combining
>>> +      card drivers to create a jack for it. Supported is
>>
>> Why the device would once support (allow) headphone and once not? Device
>> either always supports them or never...
>>
> 
> If a device has two connectors (pink and green), one for the microphone 
> and one for the headset. 

We talk about "ts3a227" here, which has always two connectors (pins)...
unless you refer to the case when these are e.g. grounded?


> It would be easier to see from the available 
> events, which is which. But of course it is possible to give it good names.
> My first approach was, that it returned all supported types, so no 
> devicetree change needed. But by colleges agreed that it would be nice
> to remove unused flags. I am happy to remove it and someone who requires 
> it can add it.
> 
>>> +        1 SND_JACK_HEADPHONE
>>> +        2 SND_JACK_MICROPHONE
>>
>> minimum and maximum
> 
> I do not understand this? It is a bitmap. I can put it as an
> enum:
>   - 1 # SND_JACK_HEADPHONE
>   - 2 # SND_JACK_MICROPHONE
>   - 3 # SND_JACK_HEADPHONE | SND_JACK_MICROPHONE


Then maximum is OR of them, isn't it?

Best regards,
Krzysztof