linux-kernel - Re: [PATCH v3 2/3] dt-bindings: display: panel: Add binding document for Xinpeng XPP055C272

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Date:   Tue, 17 Dec 2019 16:08:49 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     dri-devel@...ts.freedesktop.org, mark.rutland@....com,
        devicetree@...r.kernel.org,
        Heiko Stuebner <heiko.stuebner@...obroma-systems.com>,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        thierry.reding@...il.com, sam@...nborg.org
Subject: Re: [PATCH v3 2/3] dt-bindings: display: panel: Add binding document for Xinpeng XPP055C272

Am Dienstag, 17. Dezember 2019, 15:24:46 CET schrieb Maxime Ripard:
> Hi,
> 
> On Tue, Dec 17, 2019 at 03:07:02PM +0100, Heiko Stuebner wrote:
> > From: Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
> >
> > The XPP055C272 is a 5.5" 720x1280 DSI display.
> >
> > changes in v2:
> > - add size info into binding title (Sam)
> > - add more required properties (Sam)
> >
> > Signed-off-by: Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
> > Reviewed-by: Sam Ravnborg <sam@...nborg.org>
> > ---
> >  .../display/panel/xinpeng,xpp055c272.yaml     | 48 +++++++++++++++++++
> >  1 file changed, 48 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml b/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml
> > new file mode 100644
> > index 000000000000..2d0fc97d735c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml
> > @@ -0,0 +1,48 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/panel/sony,acx424akp.yaml#
> 
> The ID doesn't match the file name.
> 
> Did you run dt_bindings_check?

Thanks for that pointer ... I did run dtbs_check on the binding and was
sooo happy to not find any panel errors in the pages of other dt errors
but till now didn't realize that there's also a dtbinding_check.

Will keep that in mind for future bindings  - and of course fix things
in the next version.


> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Xinpeng XPP055C272 5.5in 720x1280 DSI panel
> > +
> > +maintainers:
> > +  - Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
> > +
> > +allOf:
> > +  - $ref: panel-common.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: xinpeng,xpp055c272
> > +  reg: true
> > +  backlight: true
> > +  port: true
> 
> What is the port supposed to be doing?

Hooking the display up to the dsi controller. But you're right,
works without port as well with these single-dsi displays.

I just remember needing one for the Gru-Scarlet display that needed
to connect to two dsi controllers.

So I'll drop the port node here and from my board devicetree.

Thanks for the review
Heiko


> 
> > +  reset-gpios: true
> > +  iovcc-supply:
> > +     description: regulator that supplies the iovcc voltage
> > +  vci-supply:
> > +     description: regulator that supplies the vci voltage
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - backlight
> > +  - iovcc-supply
> > +  - vci-supply
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    dsi@...50000 {
> > +        panel@0 {
> > +            compatible = "xinpeng,xpp055c272";
> > +            reg = <0>;
> > +            backlight = <&backlight>;
> > +            iovcc-supply = <&vcc_1v8>;
> > +            vci-supply = <&vcc3v3_lcd>;
> > +        };
> > +    };
> > +
> > +...
> 
> Thanks!
> Maxime
>