linux-kernel - Re: [PATCH v2 1/1] dt-bindings: display: nwl-dsi: Allow 'data-lanes' property for port@1

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Message-ID: <5856132.DvuYhMxLoT@steina-w>
Date: Mon, 13 Jan 2025 09:57:43 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: 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>, Rob Herring <robh@...nel.org>, 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>
Cc: imx@...ts.linux.dev, Frank Li <Frank.Li@....com>
Subject: Re: [PATCH v2 1/1] dt-bindings: display: nwl-dsi: Allow 'data-lanes' property for port@1

Hi Frank,

Am Freitag, 10. Januar 2025, 17:17:32 CET schrieb Frank Li:
> This controller support scalable data lanes from 1 to 4. Add the
> 'data-lanes' property to configure the number of MIPI display panel lanes
> selected for boards.
> 
> 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.
> 
> 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>

I've had a similar patch WIP. Looks good to me. For the record I based
my local change according to commit 54df4868fb728 ("dt-bindings:
samsung,mipi-dsim: Use port-base reference")

Reviewed-by: Alexander Stein <alexander.stein@...tq-group.com>

> ---
> Change from v1 to v2
> - Add the reason why need 'data-lanes' property in commit message.
> ---
>  .../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
> 


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