linux-kernel - Re: [PATCH v5 1/3] dt-bindings: drm/bridge: Document Cadence MHDP bridge bindings.

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Message-ID: <20200216152840.GB28645@pendragon.ideasonboard.com>
Date:   Sun, 16 Feb 2020 17:28:40 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Yuti Amonkar <yamonkar@...ence.com>
Cc:     Tomi Valkeinen <tomi.valkeinen@...com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, robh+dt@...nel.org, maxime@...no.tech,
        airlied@...ux.ie, daniel@...ll.ch, mark.rutland@....com,
        a.hajda@...sung.com, narmstrong@...libre.com, jonas@...boo.se,
        jernej.skrabec@...l.net, praneeth@...com, jsarha@...com,
        mparab@...ence.com, sjakhade@...ence.com
Subject: Re: [PATCH v5 1/3] dt-bindings: drm/bridge: Document Cadence MHDP
 bridge bindings.

Hi Yuti,

Thank you for the patch.

On Thu, Feb 13, 2020 at 11:16:51AM +0200, Tomi Valkeinen wrote:
> On 12/02/2020 06:26, Yuti Amonkar wrote:
> > Document the bindings used for the Cadence MHDP DPI/DP bridge in
> > yaml format.
> > 
> > Signed-off-by: Yuti Amonkar <yamonkar@...ence.com>
> > Reviewed-by: Rob Herring <robh@...nel.org>
> > ---
> >   .../bindings/display/bridge/cdns,mhdp.yaml    | 125 ++++++++++++++++++
> >   1 file changed, 125 insertions(+)
> >   create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml
> > new file mode 100644
> > index 000000000000..e7f84ed1d2da
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp.yaml
> > @@ -0,0 +1,125 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: "http://devicetree.org/schemas/display/bridge/cdns,mhdp.yaml#"
> > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> > +
> > +title: Cadence MHDP bridge
> > +
> > +maintainers:
> > +  - Swapnil Jakhade <sjakhade@...ence.com>
> > +  - Yuti Amonkar <yamonkar@...ence.com>
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - cdns,mhdp8546
> > +      - ti,j721e-mhdp8546
> > +
> > +  reg:
> > +    minItems: 1
> > +    maxItems: 2
> > +    items:
> > +      - description:
> > +          Register block of mhdptx apb registers upto PHY mapped area(AUX_CONFIG_P).
> 
> "up to". Add space before (.
> 
> > +          The AUX and PMA registers are mapped to associated phy driver.

I wouldn't mention driver here, as that's a software concept unrelated
to DT bindings. You could write "The AUX and PMA registers are not part
of this range, they are instead included in the associated PHY.".

> > +      - description:
> > +          Register block for DSS_EDP0_INTG_CFG_VP registers in case of TI J7 SoCs.
> > +
> > +  reg-names:
> > +    minItems: 1
> > +    maxItems: 2
> > +    items:
> > +      - const: mhdptx
> > +      - const: j721e-intg
> > +
> > +  clocks:
> > +    maxItems: 1
> > +    description:
> > +      DP bridge clock, it's used by the IP to know how to translate a number of

s/it's //

> > +      clock cycles into a time (which is used to comply with DP standard timings
> > +      and delays).
> > +
> > +  phys:
> > +    description: Phandle to the DisplyPort phy.
> 
> "Display"

And s/Phandle/phandle/, and s/phy/PHY/.

Shouldn't this bridge also have port nodes ?

-- 
Regards,

Laurent Pinchart