Date:   Tue, 21 Feb 2023 09:41:24 -0600
From:   Rob Herring <robh@kernel.org>
To:     Pin-yen Lin <treapking@chromium.org>
Cc:     Andrzej Hajda <andrzej.hajda@intel.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Benson Leung <bleung@chromium.org>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        devicetree@vger.kernel.org,
        Nicolas Boichat <drinkcat@chromium.org>,
        chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org,
        Guenter Roeck <groeck@chromium.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        dri-devel@lists.freedesktop.org,
        linux-mediatek@lists.infradead.org,
        Philipp Zabel <p.zabel@pengutronix.de>,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 1/5] dt-bindings: display: bridge: Add ddc-i2c-bus for
 anx7688
Message-ID: <20230221154124.GA2584323-robh@kernel.org>
References: <20230218111712.2380225-1-treapking@chromium.org>
 <20230218111712.2380225-2-treapking@chromium.org>
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On Sat, Feb 18, 2023 at 07:17:08PM +0800, Pin-yen Lin wrote:
> Introduce a optional "ddc-i2c-bus" property for anx7688 bridge. This
> allows the bridge to register a .get_edid callback.

What's .get_edid? This is a binding and is independent of Linux.

> 
> Signed-off-by: Pin-yen Lin <treapking@chromium.org>
> ---
> 
> Changes in v3:
> - New in v3
> 
>  .../bindings/display/bridge/google,cros-ec-anx7688.yaml      | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/google,cros-ec-anx7688.yaml b/Documentation/devicetree/bindings/display/bridge/google,cros-ec-anx7688.yaml
> index a44d025d33bd..9d5ce8172e88 100644
> --- a/Documentation/devicetree/bindings/display/bridge/google,cros-ec-anx7688.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/google,cros-ec-anx7688.yaml
> @@ -25,6 +25,10 @@ properties:
>      maxItems: 1
>      description: I2C address of the device.
>  
> +  ddc-i2c-bus:
> +    description: phandle link to the I2C controller used for DDC EDID probing
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +

No, this belongs in the connector node. The DDC signals are routed to 
the connector, not the bridge chip.

Rob