linux-kernel - Re: [PATCH v3 2/4] dt-bindings: media: sun6i-a31-csi: Add ISP output port

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Date:   Tue, 19 Apr 2022 15:35:40 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v3 2/4] dt-bindings: media: sun6i-a31-csi: Add ISP output
 port

Hi Rob,

On Tue 19 Apr 22, 08:08, Rob Herring wrote:
> On Fri, Apr 15, 2022 at 05:37:06PM +0200, Paul Kocialkowski wrote:
> > Some Allwinner devices come with an Image Signal Processor (ISP) that
> > allows processing camera data to produce good-looking images,
> > especially from raw bayer representations.
> > 
> > The ISP does not have a dedicated capture path: it is fed directly by
> > one of the CSI controllers, which can be selected at run-time.
> > 
> > Represent this possibility as a graph connection between the CSI
> > controller and the ISP in the device-tree bindings.
> > 
> > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> > ---
> >  .../bindings/media/allwinner,sun6i-a31-csi.yaml    | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> > index 53aa6dbe8e2c..1b41a6008195 100644
> > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> > @@ -87,6 +87,20 @@ properties:
> >  
> >          additionalProperties: false
> >  
> > +      port@2:
> > +        $ref: /schemas/graph.yaml#/$defs/port-base
> 
> If there are not any custom properties, then use 
> '/schemas/graph.yaml#/properties/port' and drop the 'properties' below.

That's right, nothing specific about it. It just represents an internal
FIFO between the different blocks.

Thanks, I think this also applies to a number of other bindings I submitted
in these series.

Paul

> > +        description: ISP output port
> > +
> > +        properties:
> > +          reg:
> > +            const: 2
> > +
> > +          endpoint:
> > +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
> > +            unevaluatedProperties: false
> > +
> > +        additionalProperties: false
> > +
> >      anyOf:
> >        - required:
> >            - port@0
> > -- 
> > 2.35.2
> > 
> > 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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