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

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Message-ID: <ZyPmeippTU8SQLkH@lizhi-Precision-Tower-5810>
Date: Thu, 31 Oct 2024 16:20:10 -0400
From: Frank Li <Frank.li@....com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
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>,
	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>, 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 09:59:26PM +0200, Dmitry Baryshkov wrote:
> 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.
> >
> > 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
>
> Why are they indexed starting from 1?

Not sure, git grep -r data-lanes Documentation/devicetree/bindings/
Most start from 1. Not sure latest DT team's intention.

Frank

>
> > +
> >      required:
> >        - port@0
> >        - port@1
> > --
> > 2.34.1
> >
>
> --
> With best wishes
> Dmitry