linux-kernel - Re: [PATCH v8 2/2] ARM: dts: mxs: Add descriptions for imx287 based btt3-[012] devices

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Message-ID: <20241017141818.2cf462ce@wsk>
Date: Thu, 17 Oct 2024 14:18:18 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Fabio Estevam <festevam@...il.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha
 Hauer <s.hauer@...gutronix.de>, Stefan Wahren <wahrenst@....net>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 devicetree@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/2] ARM: dts: mxs: Add descriptions for imx287 based
 btt3-[012] devices

Hi Fabio,

> Hi Lukasz,
> 
> On Thu, Oct 17, 2024 at 5:35 AM Lukasz Majewski <lukma@...x.de> wrote:
> 
> > Stefan, do you have comments for this version?  
> 
> Rob's bot reported new warnings after applying your series:
> 
>         from schema $id:
> http://devicetree.org/schemas/display/panel/panel-dpi.yaml#
> arch/arm/boot/dts/nxp/mxs/imx28-btt3-2.dtb: panel: compatible:
> ['panel-dpi'] is too short
>         from schema $id:
> http://devicetree.org/schemas/display/panel/panel-dpi.yaml#
> arch/arm/boot/dts/nxp/mxs/imx28-btt3-1.dtb: panel: compatible:
> ['panel-dpi'] is too short
>         from schema $id:
> http://devicetree.org/schemas/display/panel/panel-dpi.yaml#
> 
> Please address it.

The problem is that I don't know the name of the display itself
(different vendors) [*].

Schema requires following syntax:
arch/arm/boot/dts/ti/omap/am437x-gp-evm.dts:89:         compatible =
"osddisplays,osd070t1718-19ts", "panel-dpi";

arch/arm/boot/dts/ti/omap/omap3-thunder.dts:86:         compatible =
"samsung,lte430wq-f0c", "panel-dpi";

which require two compatible entries - one specific type of the display
(e.g. "samsung,lte430wq-f0c") and the second one generic ("panel-dpi").

As I don't know what is the manufacturer of it - I can add:

 compatible = "foo", "panel-dpi";

and then Schema and Rob's scripts would be happy...


Another option is to adjust the
Documentation/devicetree/bindings/display/panel/panel-dpi.yaml to allow
only single entry.


[*] maybe I can obtain the info regarding at least one vendor ...

Best regards,

Lukasz Majewski

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