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Message-ID: <784cc3a5-8b10-aed3-b151-77cedb531f25@ti.com>
Date:   Mon, 9 Jan 2023 21:19:08 +0530
From:   Aradhya Bhatia <a-bhatia1@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Tomi Valkeinen <tomba@...nel.org>,
        Jyri Sarha <jyri.sarha@....fi>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Maxime Ripard <maxime@...no.tech>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Guo Ren <guoren@...nel.org>
CC:     DRI Development List <dri-devel@...ts.freedesktop.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel List <linux-kernel@...r.kernel.org>,
        Linux RISC-V List <linux-riscv@...ts.infradead.org>,
        Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
        Linux Mediatek List <linux-mediatek@...ts.infradead.org>,
        Linux C-SKY Arch List <linux-csky@...r.kernel.org>,
        Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rahul T R <r-ravikumar@...com>,
        Devarsh Thakkar <devarsht@...com>,
        Jai Luthra <j-luthra@...com>,
        Jayesh Choudhary <j-choudhary@...com>
Subject: Re: [RFC PATCH 3/4] dt-bindings: panel: Introduce dual-link LVDS
 panel

Hi Krzysztof,

On 03-Jan-23 16:58, Krzysztof Kozlowski wrote:
> On 03/01/2023 12:02, Aradhya Bhatia wrote:
>> But this is throwing an error. I am confused what else could be done.
>> Can you please suggest what might be a more accurate check here?
>>
>>>
>>>> +              required:
>>>> +                - dual-lvds-odd-pixels
>>>> +        then:
>>>> +          properties:
>>>> +            port@1:
>>>> +              properties:
>>>> +                dual-lvds-even-pixels: true
>>>> +                dual-lvds-odd-pixels: false
>>>
>>> Why do you need this? Your oneOf before already solves it.
>>
>> I agree with your comment here. It makes sense to only have
>>
>> 	dual-lvds-even-pixels: true
>>
>> and have the oneOf condition take care of the other. But, I just tested
>> this and it was unable to pick-up this intentionally-added error.
>>
>> I added 'dual-lvds-odd-pixels' property to both the nodes, and
>> dt_binding_check passes successfully (which it should have not.)
>>
>> Instead, if I only keep this,
>>
>> 	dual-lvds-odd-pixels: false
>>
>> then the dt_binding_check detects the error as it should.
>>
>> Regardless, I am curious why the first method doesn't work. Will try to
>> explore more on that.
> 
> The check for presence of properties is only against required:, but you
> added there properties. Like this:
> 
> https://elixir.bootlin.com/linux/v5.17-rc2/source/Documentation/devicetree/bindings/mfd/samsung,s5m8767.yaml#L155
> 
> 
> Other way is to drop your both oneOf and entire allOf from ports and use:
> 
> oneOf:
>    - properties:
>        ports:
>          $ref: /schemas/graph.yaml#/properties/ports
>          properties:
>            port@0:
>              required:
>                - dual-lvds-odd-pixels
>            port@1:
>              required:
>                - dual-lvds-even-pixels
>    - properties:
>        ports:
>          $ref: /schemas/graph.yaml#/properties/ports
>          properties:
>            port@1:
>              required:
>                - dual-lvds-odd-pixels
>            port@0:
>              required:
>                - dual-lvds-even-pixels
> 

Thank you for the suggestions.
I tested the both of them, and they seem to be working as expected.

V2 will reflect all the required fixes.


Regards
Aradhya

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