linux-kernel - Re: [PATCH v2 6/7] dt-bindings: Add ANX6345 DP/eDP transmitter binding

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Date:   Wed, 12 Jun 2019 10:16:37 +0200
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Torsten Duwe <duwe@....de>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Icenowy Zheng <icenowy@...c.io>,
        Sean Paul <seanpaul@...omium.org>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Harald Geyer <harald@...ib.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/7] dt-bindings: Add ANX6345 DP/eDP transmitter
 binding

On 04.06.2019 14:23, Torsten Duwe 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>
> Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Torsten Duwe <duwe@...e.de>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> ---
>  .../devicetree/bindings/display/bridge/anx6345.txt | 57 ++++++++++++++++++++++
>  1 file changed, 57 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..bd63f6ac107e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/anx6345.txt
> @@ -0,0 +1,57 @@
> +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


You have not specified it's active state, since in driver's code you
named it RESETN I guess it should be active low.


> + - dvdd12-supply	: Regulator for 1.2V digital core power.
> + - dvdd25-supply	: Regulator for 2.5V digital core power.
> + - Video port for LVTTL input, using the DT bindings defined in [1].


Please assign port number for input (I guess 0).


> +
> +Optional properties:
> +
> + - Video port for eDP output (panel or connector) using the DT bindings
> +   defined in [1].


Shouldn't it be also required?


Regards

Andrzej


> +
> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Example:
> +
> +anx6345: anx6345@38 {
> +	compatible = "analogix,anx6345";
> +	reg = <0x38>;
> +	reset-gpios = <&pio 3 24 GPIO_ACTIVE_LOW>; /* PD24 */
> +	dvdd25-supply = <&reg_dldo2>;
> +	dvdd12-supply = <&reg_fldo1>;
> +
> +	ports {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		anx6345_in: port@0 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			reg = <0>;
> +			anx6345_in_tcon0: endpoint@0 {
> +				reg = <0>;
> +				remote-endpoint = <&tcon0_out_anx6345>;
> +			};
> +		};
> +
> +		anx6345_out: port@1 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			reg = <1>;
> +
> +			anx6345_out_panel: endpoint@0 {
> +				reg = <0>;
> +				remote-endpoint = <&panel_in_edp>;
> +			};
> +		};
> +	};
> +};