linux-kernel - Re: [PATCH 1/1] dt-bindings: display: nwl-dsi: Allow 'data-lanes' property for port@1

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Message-ID: <20241104154059.GA203243-robh@kernel.org>
Date: Mon, 4 Nov 2024 09:40:59 -0600
From: Rob Herring <robh@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Guido Gúnther <agx@...xcpu.org>,
	Robert Chiras <robert.chiras@....com>,
	"open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>, imx@...ts.linux.dev
Subject: Re: [PATCH 1/1] dt-bindings: display: nwl-dsi: Allow 'data-lanes'
 property for port@1

On Thu, Oct 31, 2024 at 03:47:14PM -0400, Frank Li wrote:
> Change $ref of port@1 from 'port' to 'port-base' and add 'endpoint'
> property referencing video-interfaces.yaml. Allow 'data-lanes' values
> 1, 2, 3, and 4 for port@1.

Describe "why", not what the changes are. I can read the diff. Why is 
the IP has a configurable number of lanes...

> 
> Fix below CHECK_DTB warnings:
> arch/arm64/boot/dts/freescale/imx8mq-tqma8mq-mba8mx-lvds-tm070jvhg33.dtb:
>  dsi@...00000: ports:port@1:endpoint: Unevaluated properties are not allowed ('data-lanes' was unexpected)
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  .../bindings/display/bridge/nwl-dsi.yaml       | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml b/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
> index 350fb8f400f02..5952e6448ed47 100644
> --- a/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
> @@ -111,11 +111,27 @@ properties:
>          unevaluatedProperties: false
>  
>        port@1:
> -        $ref: /schemas/graph.yaml#/properties/port
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
>          description:
>            DSI output port node to the panel or the next bridge
>            in the chain
>  
> +        properties:
> +          endpoint:
> +            $ref: /schemas/media/video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              data-lanes:
> +                description: array of physical DSI data lane indexes.
> +                minItems: 1
> +                items:
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +                  - const: 4
> +
>      required:
>        - port@0
>        - port@1
> -- 
> 2.34.1
>