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

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Message-ID: <20200216153132.GC28645@pendragon.ideasonboard.com>
Date:   Sun, 16 Feb 2020 17:31:32 +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,

On Sun, Feb 16, 2020 at 05:28:40PM +0200, Laurent Pinchart wrote:
> 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 ?

Oops, sorry, I missed that Tomi's reply has removed part of the original
patch. Please disregard this last comment, I'll reply to the original.

-- 
Regards,

Laurent Pinchart