linux-kernel - Re: [PATCH 1/5] dt-bindings: media: venus: Add qcm2290 dt schema

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Message-ID: <48e6cc62-ffb0-4ca7-80c8-9e510db505db@kernel.org>
Date: Mon, 16 Jun 2025 18:23:18 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Jorge Ramirez <jorge.ramirez@....qualcomm.com>
Cc: quic_vgarodia@...cinc.com, quic_dikshita@...cinc.com,
 bryan.odonoghue@...aro.org, mchehab@...nel.org, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, stanimir.varbanov@...aro.org,
 linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] dt-bindings: media: venus: Add qcm2290 dt schema

On 16/06/2025 18:18, Jorge Ramirez wrote:
> On 16/06/25 16:41:44, Krzysztof Kozlowski wrote:
>> On 16/06/2025 14:52, Jorge Ramirez wrote:
>>>>
>>>>> +  The Venus AR50_LITE IP is a video encode and decode accelerator present
>>>>> +  on Qualcomm platforms
>>>>> +
>>>>> +allOf:
>>>>> +  - $ref: qcom,venus-common.yaml#
>>>>> +
>>>>> +properties:
>>>>> +  compatible:
>>>>> +    const: qcom,qcm2290-venus
>>>>> +
>>>>> +  power-domains:
>>>>> +    minItems: 2
>>>>> +    maxItems: 3
>>>>> +
>>>>> +  power-domain-names:
>>>>> +    minItems: 2
>>>>
>>>> Why is this flexible? Either you have two or three. Not mixed.
>>>
>>> please check 5b380f242f360256c96e96adabeb7ce9ec784306
>>
>> This does not explain why this is optional HERE. You cannot use for a
>> new platform an argument that some existing platform was changed in
>> ABI-preserving way.
> 
> thanks for quick the follow up.
> 
> but bear with me please because I dont follow - why can the same logic
> be used - it being applicable - and therefore result in a definition
> similar to those other platforms?

Because this platform either has 2 or 3, not both. Unless that's not
true, but then please share some arguments.

Best regards,
Krzysztof