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Message-ID: <2a715a8a-c4c1-42ea-9159-15f25338d36c@linaro.org>
Date:   Wed, 25 Oct 2023 09:04:08 +0200
MIME-Version: 1.0
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Subject: Re: [PATCH v13 6/8] media: dt-bindings: wave5: add Chips&Media 521c
 codec IP support
Content-Language: en-US
To:     Sebastian Fricke <sebastian.fricke@collabora.com>
Cc:     Rob Herring <robh@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        NXP Linux Team <linux-imx@nxp.com>,
        Conor Dooley <conor+dt@kernel.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Jackson Lee <jackson.lee@chipsnmedia.com>,
        Hans Verkuil <hverkuil@xs4all.nl>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Shawn Guo <shawnguo@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Nas Chung <nas.chung@chipsnmedia.com>,
        Fabio Estevam <festevam@gmail.com>,
        linux-media@vger.kernel.org, Tomasz Figa <tfiga@chromium.org>,
        linux-kernel@vger.kernel.org,
        Nicolas Dufresne <nicolas.dufresne@collabora.com>,
        kernel@collabora.com, Robert Beckett <bob.beckett@collabora.com>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        Darren Etheridge <detheridge@ti.com>
References: <20230929-wave5_v13_media_master-v13-0-5ac60ccbf2ce@collabora.com>
 <20230929-wave5_v13_media_master-v13-6-5ac60ccbf2ce@collabora.com>
 <b94e3561-f5ef-443f-98c7-9b79a8bbceec@linaro.org>
 <20231016134720.GA2650973-robh@kernel.org>
 <20231021120526.eqe3esyxyi5b3e5d@basti-XPS-13-9310>
 <3d465d3c-386d-467b-87e9-806962464ac5@linaro.org>
 <20231024051745.d663ekj7klrl4yzj@basti-XPS-13-9310>
 <7240fa39-1a8f-4338-b5ae-b469dfaeb7e1@linaro.org>
 <20231025061713.kmmu432q76t32iv6@basti-XPS-13-9310>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <20231025061713.kmmu432q76t32iv6@basti-XPS-13-9310>
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Precedence: bulk

On 25/10/2023 08:17, Sebastian Fricke wrote:
> 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.

It does not matter. You must not have wildcards in compatibles.

> 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