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Date:   Mon, 11 Jan 2021 18:20:16 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Jacob Chen <jacob-chen@...wrt.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 3/5] dt-bindings: media: rockchip-vpu: Add PX30 compatible

Hi Philipp,

On Thu 07 Jan 21, 15:55, Philipp Zabel wrote:
> Hi Paul,
> 
> On Thu, 2021-01-07 at 14:40 +0100, Paul Kocialkowski wrote:
> > The Rockchip PX30 SoC has a Hantro VPU that features a decoder (VDPU2)
> > and an encoder (VEPU2). It is similar to the RK3399's VPU but takes an
> > extra clock (SCLK).
> > 
> > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> > ---
> >  .../bindings/media/rockchip-vpu.yaml          | 25 +++++++++++++------
> >  1 file changed, 17 insertions(+), 8 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/media/rockchip-vpu.yaml b/Documentation/devicetree/bindings/media/rockchip-vpu.yaml
> > index c81dbc3e8960..c446b9ead21b 100644
> > --- a/Documentation/devicetree/bindings/media/rockchip-vpu.yaml
> > +++ b/Documentation/devicetree/bindings/media/rockchip-vpu.yaml
> > @@ -15,10 +15,13 @@ description:
> >  
> >  properties:
> >    compatible:
> > -    enum:
> > -      - rockchip,rk3288-vpu
> > -      - rockchip,rk3328-vpu
> > -      - rockchip,rk3399-vpu
> > +    oneOf:
> > +      - const: rockchip,rk3288-vpu
> > +      - const: rockchip,rk3328-vpu
> > +      - const: rockchip,rk3399-vpu
> > +      - items:
> > +        - const: rockchip,px30-vpu
> > +        - const: rockchip,rk3399-vpu
> >  
> >    reg:
> >      maxItems: 1
> > @@ -35,12 +38,18 @@ properties:
> >            - const: vdpu
> >  
> >    clocks:
> > -    maxItems: 2
> > +    minItems: 2
> > +    maxItems: 3
> >  
> >    clock-names:
> > -    items:
> > -      - const: aclk
> > -      - const: hclk
> > +    oneOf:
> > +      - items:
> > +        - const: aclk
> > +        - const: hclk
> > +      - items:
> > +        - const: aclk
> > +        - const: hclk
> > +        - const: sclk
> 
> You could make this:
> 
>     clock-names:
>       minItems: 2
>       items:
>         - const: aclk
>         - const: hclk
>         - const: sclk
> 
> And then:
> 
> allOf:
>   - if:
>       properties:
>         compatible:
>           contains:
>             const: rockchip,px30-vpu
>     then:
>       properties:
>         clock-names:
>           minItems: 3
> 
> to make sure each variant has the correct clocks set.

Thanks for the suggestion! That's a finer grain that my proposal.

Rob, is there a preference for how this case should be handled?
Here, we want to specify an extra clock for the PX30 case.

Cheers,

Paul

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

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