Re: [PATCH v2 61/66] dt-bindings: media: Add Allwinner A31 ISP bindings documentation

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On Mon, Feb 07, 2022 at 05:51:21PM +0200, Laurent Pinchart wrote:
> Hi Paul,
> 
> Thank you for the patch.
> 
> On Sat, Feb 05, 2022 at 07:54:24PM +0100, Paul Kocialkowski wrote:
> > This introduces YAML bindings documentation for the Allwinner A31 Image
> > Signal Processor (ISP).
> > 
> > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> > ---
> >  .../media/allwinner,sun6i-a31-isp.yaml        | 117 ++++++++++++++++++
> >  1 file changed, 117 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
> > new file mode 100644
> > index 000000000000..2d87022c43ce
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
> > @@ -0,0 +1,117 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/media/allwinner,sun6i-a31-isp.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Allwinner A31 Image Signal Processor Driver (ISP) Device Tree Bindings
> > +
> > +maintainers:
> > +  - Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - allwinner,sun6i-a31-isp
> > +      - allwinner,sun8i-v3s-isp
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: Bus Clock
> > +      - description: Module Clock
> > +      - description: DRAM Clock
> 
> That's interesting, does the ISP have a dedicated DRAM ?
> 
> > +
> > +  clock-names:
> > +    items:
> > +      - const: bus
> > +      - const: mod
> > +      - const: ram
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +  ports:
> > +    $ref: /schemas/graph.yaml#/properties/ports
> > +
> > +    properties:
> > +      port@0:
> > +        $ref: /schemas/graph.yaml#/$defs/port-base
> > +        description: CSI0 input port
> > +
> > +        properties:
> > +          reg:
> > +            const: 0
> > +
> > +          endpoint:
> > +            $ref: video-interfaces.yaml#
> > +            unevaluatedProperties: false
> 
> If no other property than remote-endpoint are allowed, I'd write
> 
>           endpoint:
>             $ref: video-interfaces.yaml#
> 	    remote-endpoint: true

You just mixed a node and a property...

'remote-endpoint' is always allowed, so need to put it here and every 
other user. So 'unevaluatedProperties' is correct. But it would be good 
to define what properties from video-interfaces.yaml are used here.

Rob



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