linux-kernel - Re: [PATCH 4/9] dt-bindings: Add ANX6345 DP/eDP transmitter binding

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Date:   Thu, 18 Oct 2018 11:53:16 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     David Airlie <airlied@...ux.ie>, Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH 4/9] dt-bindings: Add ANX6345 DP/eDP transmitter binding

Hi Icenowy,

Thank you for the patch.

On Thursday, 18 October 2018 10:33:22 EEST Icenowy Zheng wrote:
> The ANX6345 is an ultra-low power DisplayPort/eDP transmitter designed
> for portable devices.
> 
> Add a binding document for it.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> ---
>  .../bindings/display/bridge/anx6345.txt       | 39 +++++++++++++++++++
>  1 file changed, 39 insertions(+)
>  create mode 100644
> Documentation/devicetree/bindings/display/bridge/anx6345.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/anx6345.txt
> b/Documentation/devicetree/bindings/display/bridge/anx6345.txt new file
> mode 100644
> index 000000000000..0689d4eb5f65
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/anx6345.txt
> @@ -0,0 +1,39 @@
> +Analogix ANX6345 eDP Transmitter
> +--------------------------------
> +
> +The ANX6345 is an ultra-low power Full-HD eDP transmitter designed for
> +portable devices.
> +
> +Required properties:
> +
> + - compatible		: "analogix,anx6345"
> + - reg			: I2C address of the device
> + - reset-gpios		: Which GPIO to use for reset
> +
> +Optional properties:
> +
> + - dvdd12-supply	: Regulator for 1.2V digital core power.
> + - dvdd25-supply	: Regulator for 2.5V digital core power.

Shouldn't these to supplies be mandatory ?

> + - panel-supply		: Regulator for the power of the panel.

Shouldn't the panel supply for specified in the DT node of the panel ?

> + - edid			: verbatim EDID data block describing attached
> +			  panel, only used when the panel has no EDID info.

This should also be specified in the panel DT node.

> + - Video port for RGB input, using the DT bindings defined in [1].

I think you should also add a port for the output.

> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Example:
> +
> +anx6345: anx6345@38 {
> +	compatible = "analogix,anx6345";
> +	reg = <0x38>;
> +	reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> +	panel-supply = <&reg_dc1sw>;
> +	dvdd25-supply = <&reg_dldo2>;
> +	dvdd12-supply = <&reg_fldo1>;
> +
> +	port {
> +		anx6345_in: endpoint {
> +			remote-endpoint = <&tcon0_out_anx6345>;
> +		};
> +	};
> +};

-- 
Regards,

Laurent Pinchart