linux-kernel - Re: [PATCH v2 1/2] dt-bindings: display: Add SSD133x OLED controllers

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Date: Tue, 19 Dec 2023 15:29:43 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, Conor Dooley
 <conor@...nel.org>
Cc: linux-kernel@...r.kernel.org, Maxime Ripard <mripard@...nel.org>,
 Jocelyn Falempe <jfalempe@...hat.com>, Geert Uytterhoeven
 <geert@...ux-m68k.org>, Thomas Zimmermann <tzimmermann@...e.de>, Peter
 Robinson <pbrobinson@...il.com>, Rob Herring <robh@...nel.org>, Conor
 Dooley <conor+dt@...nel.org>, Daniel Vetter <daniel@...ll.ch>, David
 Airlie <airlied@...il.com>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Rob Herring <robh+dt@...nel.org>,
 devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 1/2] dt-bindings: display: Add SSD133x OLED controllers

Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> writes:

Hello Krzysztof,

> On 19/12/2023 12:20, Javier Martinez Canillas wrote:

[...]

>>>> +allOf:
>>>> +  - $ref: solomon,ssd-common.yaml#
>>>> +

[...]

>>>  
>>> +  width:
>>> +    default: 96
>>> +
>>> +  height:
>>> +    default: 64
>
> Which also looks wrong on its own. Where is the definition of these

Yes, I already discussed this with Conor and mentioned to him that is a
typo but already fixed it locally and I'm testing with the correct ones.

> properties? IOW, where do they come from?
>

The "solomon,width" and "solomon,height" properties are defined in the
solomon,ssd-common.yaml binding schema file that is referenced.

>>> +
>> 
>> ...but when trying move the default for the "solomon,width" and
>> "solomon,height" to the properties section, make dt_binding_check
>> complains as follows:
>
> Worked for me.
>

Oh, that's good to know. I wonder what's the difference...

> ...
>
>>   DTC_CHK Documentation/devicetree/bindings/display/solomon,ssd133x.example.dtb
>> 
>> The warning goes away if I follow the hints and add a type and description
>> to the properties, i.e:
>
> Hm, I wonder what's different in your case. I assume you run the latest
> dtschema.
>

Not the latest but had a recent one. I've updated it, so I do now :)

$ pip list | grep dtschema
dtschema                      2023.9

$ pip install --upgrade dtschema

$ pip list | grep dtschema
dtschema                      2023.11

[...]

>> But that would duplicate information that is already present in the
>> included solomon,ssd-common.yaml schema. Do you know what is the proper
>> way to do this?
>
> Works for me, so please paste somewhere proper diff so we can compare.
>

With the latest dtschema version it works indeed. Thanks for the pointer!

$ make W=1 dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/display/solomon,ssd133x.yaml 
  LINT    Documentation/devicetree/bindings
  CHKDT   Documentation/devicetree/bindings/processed-schema.json
  SCHEMA  Documentation/devicetree/bindings/processed-schema.json
  DTEX    Documentation/devicetree/bindings/display/solomon,ssd133x.example.dts
  DTC_CHK Documentation/devicetree/bindings/display/solomon,ssd133x.example.dtb

> Best regards,
> Krzysztof
>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat