linux-kernel - Re: [PATCH v13 6/8] media: dt-bindings: wave5: add Chips&Media 521c codec IP support

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Message-ID: <20231025061713.kmmu432q76t32iv6@basti-XPS-13-9310>
Date:   Wed, 25 Oct 2023 08:17:13 +0200
From:   Sebastian Fricke <sebastian.fricke@...labora.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        NXP Linux Team <linux-imx@....com>,
        Conor Dooley <conor+dt@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Jackson Lee <jackson.lee@...psnmedia.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Nas Chung <nas.chung@...psnmedia.com>,
        Fabio Estevam <festevam@...il.com>,
        linux-media@...r.kernel.org, Tomasz Figa <tfiga@...omium.org>,
        linux-kernel@...r.kernel.org,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        kernel@...labora.com, Robert Beckett <bob.beckett@...labora.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Darren Etheridge <detheridge@...com>
Subject: Re: [PATCH v13 6/8] media: dt-bindings: wave5: add Chips&Media 521c
 codec IP support

Hey Krzysztof,

On 24.10.2023 09:24, Krzysztof Kozlowski wrote:
>On 24/10/2023 07:17, Sebastian Fricke wrote:
>
>>>>> It needs an SoC specific compatible (TI something...) as well (or
>>>>> instead). Unless there's a public spec with details on how many
>>>>> clocks, resets, interrupts, etc. there are.
>>>>
>>>> Okay so how about this, a bit similar to the Coda driver supplying both
>>>> a general option and a SoC specific version:
>>>
>>> Can generic compatible be used alone in board designs? If it is licensed
>>> block, then most likely you want a fallback.
>>
>> Alright, so a fallback seems appropriate, how do you like this?
>>
>> properties:
>>    compatible:
>>      items:
>>        - enum:
>>            - const: ti,k3-j721sX-wave521c
>>        - const: cnm,wave521c
>>
>> Providing a fallback and adding a enum which can be extended later on.
>
>This looks almost good. I wonder what is "j721sX" - Google does not find
>it. There is thouhg j721se.

Well that was a misunderstanding from my side I thought that both j721se
and j721s2 have the Wave5 IP block and wanted to describe both with
j721sX. But as it turns out the IP block isn't present on j721se.
Additionally, I was only able to test the codec on j721s2 for now and so
I would opt for calling it: `ti,k3-j721s2-wave521c`

>
>Best regards,
>Krzysztof

Sincerely,
Sebastian

>
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