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Message-ID: <20191219204524.GA7841@bogus>
Date:   Thu, 19 Dec 2019 14:45:24 -0600
From:   Rob Herring <robh@...nel.org>
To:     Hsin-Yi Wang <hsinyi@...omium.org>
Cc:     dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        p.zabel@...gutronix.de,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Matthias Brugger <mbrugger@...e.com>,
        Russell King <rmk+kernel@....linux.org.uk>
Subject: Re: [PATCH RESEND 1/4] dt-bindings: drm/bridge: analogix-anx7688:
 Add ANX7688 transmitter binding

On Wed, Dec 11, 2019 at 02:19:08PM +0800, Hsin-Yi Wang wrote:
> From: Nicolas Boichat <drinkcat@...omium.org>
> 
> Add support for analogix,anx7688
> 
> Signed-off-by: Nicolas Boichat <drinkcat@...omium.org>
> Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> ---
> Change from RFC to v1:
> - txt to yaml
> ---
>  .../bindings/display/bridge/anx7688.yaml      | 60 +++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/anx7688.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/anx7688.yaml b/Documentation/devicetree/bindings/display/bridge/anx7688.yaml
> new file mode 100644
> index 000000000000..cf79f7cf8fdf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/anx7688.yaml
> @@ -0,0 +1,60 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/anx7688.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analogix ANX7688 SlimPort (Single-Chip Transmitter for DP over USB-C)
> +
> +maintainers:
> +  - Nicolas Boichat <drinkcat@...omium.org>
> +
> +description: |
> +  The ANX7688 is a single-chip mobile transmitter to support 4K 60 frames per
> +  second (4096x2160p60) or FHD 120 frames per second (1920x1080p120) video
> +  resolution from a smartphone or tablet with full function USB-C.
> +
> +  This binding only describes the HDMI to DP display bridge.
> +
> +properties:
> +  compatible:
> +    const: analogix,anx7688
> +
> +  reg:
> +    maxItems: 1
> +    description: I2C address of the device
> +
> +  ports:
> +    type: object
> +
> +    properties:
> +      port@0:
> +        type: object
> +        description: |
> +          Video port for HDMI input
> +
> +      port@1:
> +        type: object
> +        description: |
> +          Video port for eDP output
> +
> +    required:
> +      - port@0

Sometimes you have no output?

> +
> +required:
> +  - compatible
> +  - reg
> +  - ports

The example will have errors because it is missing 'ports'. Run 'make 
dt_binding_check'.

Add:

additionalProperties: false

> +
> +examples:
> +  - |
> +    anx7688: anx7688@2c {
> +      compatible = "analogix,anx7688";
> +      reg = <0x2c>;
> +
> +      port {
> +        anx7688_in: endpoint {
> +          remote-endpoint = <&hdmi0_out>;
> +        };
> +      };
> +    };
> -- 
> 2.24.0.525.g8f36a354ae-goog
> 

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