linux-kernel - RE: [EXT] Re: [PATCH v7 3/7] dt-bindings: display: bridge: Add Cadence MHDP850

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Date:   Wed, 19 Jul 2023 02:32:41 +0000
From:   Sandor Yu <sandor.yu@....com>
To:     Rob Herring <robh@...nel.org>
CC:     Alexander Stein <alexander.stein@...tq-group.com>,
        "andrzej.hajda@...el.com" <andrzej.hajda@...el.com>,
        "neil.armstrong@...aro.org" <neil.armstrong@...aro.org>,
        "Laurent.pinchart@...asonboard.com" 
        <Laurent.pinchart@...asonboard.com>,
        "jonas@...boo.se" <jonas@...boo.se>,
        "jernej.skrabec@...il.com" <jernej.skrabec@...il.com>,
        "airlied@...il.com" <airlied@...il.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        "ker nel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        Oliver Brown <oliver.brown@....com>,
        "sam@...nborg.org" <sam@...nborg.org>
Subject: RE: [EXT] Re: [PATCH v7 3/7] dt-bindings: display: bridge: Add
 Cadence MHDP850

Hi Rob,

Thanks for your comment.

> > Hi Alexander,
> >
> > Thanks for your comments,
> >
> > >
> > > Am Montag, 17. Juli 2023, 10:03:49 CEST schrieb Sandor Yu:
> > > > ********************
> > > > Achtung externe E-Mail: Öffnen Sie Anhänge und Links nur, wenn Sie
> > > > wissen, dass diese aus einer sicheren Quelle stammen und sicher sind.
> > > > Leiten Sie die E-Mail im Zweifelsfall zur Prüfung an den IT-Helpdesk
> weiter.
> > > > Attention external email: Open attachments and links only if you
> > > > know that they are from a secure source and are safe. In doubt
> > > > forward the email to the IT-Helpdesk to check it.
> > > > ********************
> > > >
> > > > Add bindings for Cadence MHDP8501 DisplayPort/HDMI bridge..
> > > >
> > > > Signed-off-by: Sandor Yu <Sandor.yu@....com>
> > > > ---
> > > >  .../display/bridge/cdns,mhdp8501.yaml         | 105
> > > ++++++++++++++++++
> > > >  1 file changed, 105 insertions(+)  create mode 100644
> > > >
> Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.yam
> > > > l
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.y
> > > > aml
> > > > b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.y
> > > > aml new file mode 100644 index 000000000000..b983ee765f54
> > > > --- /dev/null
> > > > +++
> > > b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8501.y
> > > > +++ aml
> > > > @@ -0,0 +1,105 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> > > > +---
> > > > +$id:
> > > > +http://devi/
> > > >
> > >
> +cetree.org%2Fschemas%2Fdisplay%2Fbridge%2Fcdns%2Cmhdp8501.yaml%
> > > 23&dat
> > > >
> > >
> +a=05%7C01%7CSandor.yu%40nxp.com%7C603a90f3f3c34d32a1e708db86a
> > > 8f868%7C
> > > >
> > >
> +686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63825183250590544
> > > 2%7CUnkno
> > > >
> > >
> +wn%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1
> > > haWwi
> > > >
> > >
> +LCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=JnbufeZplo%2B6JGW4HaK
> > > %2BLyC0MESK
> > > > +GsV%2FtjfeXCXqK4U%3D&reserved=0
> > > > +$schema:
> > > > +http://devi/
> > > >
> > >
> +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7CSandor.
> > > yu%40n
> > > >
> > >
> +xp.com%7C603a90f3f3c34d32a1e708db86a8f868%7C686ea1d3bc2b4c6fa9
> > > 2cd99c5
> > > >
> > >
> +c301635%7C0%7C0%7C638251832505905442%7CUnknown%7CTWFpbGZs
> > > b3d8eyJWIjoi
> > > >
> > >
> +MC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3
> > > 000%7C%
> > > >
> > >
> +7C%7C&sdata=rdOyjVz4gGnToVC40Rcfp%2Fk925yC%2F6xNwGbBAnOtcDQ
> > > %3D&reserv
> > > > +ed=0
> > > > +
> > > > +title: Cadence MHDP8501 DP/HDMI bridge
> > > > +
> > > > +maintainers:
> > > > +  - Sandor Yu <Sandor.yu@....com>
> > > > +
> > > > +description:
> > > > +  Cadence MHDP8501 DisplayPort/HDMI interface.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    enum:
> > > > +      - cdns,mhdp8501
> > > > +      - fsl,imx8mq-mhdp8501
> > > > +
> > > > +  reg:
> > > > +    maxItems: 1
> > > > +
> > > > +  clocks:
> > > > +    maxItems: 1
> > > > +    description: MHDP8501 DP/HDMI APB clock.
> > > > +
> > > > +  phys:
> > > > +    maxItems: 1
> > > > +    description:
> > > > +      phandle to the DisplayPort or HDMI PHY
> > > > +
> > > > +  interrupts:
> > > > +    items:
> > > > +      - description: Hotplug cable plugin.
> > > > +      - description: Hotplug cable plugout.
> > > > +
> > > > +  interrupt-names:
> > > > +    items:
> > > > +      - const: plug_in
> > > > +      - const: plug_out
> > > > +
> > > > +  ports:
> > > > +    $ref: /schemas/graph.yaml#/properties/ports
> > > > +
> > > > +    properties:
> > > > +      port@0:
> > > > +        $ref: /schemas/graph.yaml#/properties/port
> > > > +        description:
> > > > +          Input port from display controller output.
> > > > +      port@1:
> > > > +        $ref: /schemas/graph.yaml#/properties/port
> > > > +        description:
> > > > +          Output port to DisplayPort or HDMI connector.
> > > > +
> > > > +    required:
> > > > +      - port@0
> > > > +      - port@1
> > > > +
> > > > +required:
> > > > +  - compatible
> > > > +  - reg
> > > > +  - clocks
> > > > +  - interrupts
> > > > +  - interrupt-names
> > > > +  - phys
> > > > +  - ports
> > > > +
> > > > +additionalProperties: false
> > > > +
> > > > +examples:
> > > > +  - |
> > > > +    #include <dt-bindings/clock/imx8mq-clock.h>
> > > > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > > +
> > > > +    mhdp_dp: dp-bridge@...00000 {
> > >
> > > I'm not sure, but I would name this node just 'bridge', because it
> > > can be either DP or HDMI depending on the connector. But DT folks
> > > will know better than me.
> > This name should update too after DP and HDMI driver combined.
> 
> Has nothing to do with a driver.
> 
> > I will change to "mhdp: mhdp-bridge@...00000" in the next version.
> 
> What is 'mhdp'? Doesn't sound generic. Use just 'bridge' or 'display-bridge'.
> We don't have a standard name defined in the DT spec (there's 'hdmi', but
> nothing that's protocol independent).

OK, thanks, will change to "mhdp: display-bridge@...00000".
B.R
Sandor
> 
> Rob