linux-kernel - Re: [PATCH V7 1/4] Documentation/devicetree/bindings: b850v3_lvds

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Date:   Tue, 10 Jan 2017 23:06:22 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Peter Senna Tschudin <peter.senna@...labora.com>, airlied@...ux.ie,
        architt@...eaurora.org, akpm@...ux-foundation.org,
        daniel.vetter@...ll.ch, davem@...emloft.net,
        devicetree@...r.kernel.org, enric.balletbo@...labora.com,
        eballetbo@...il.com, galak@...eaurora.org,
        gregkh@...uxfoundation.org, heiko@...ech.de,
        ijc+devicetree@...lion.org.uk, javier@...hile0.org, jslaby@...e.cz,
        kernel@...gutronix.de, linux-arm-kernel@...ts.infradead.org,
        linux@...linux.org.uk, linux-kernel@...r.kernel.org,
        linux@...ck-us.net, mark.rutland@....com, martin.donnelly@...com,
        martyn.welch@...labora.co.uk, mchehab@....samsung.com,
        pawel.moll@....com, peter.senna@...il.com, p.zabel@...gutronix.de,
        thierry.reding@...il.com, rmk+kernel@...linux.org.uk,
        robh+dt@...nel.org, shawnguo@...nel.org, tiwai@...e.com,
        treding@...dia.com, ykk@...k-chips.com,
        Fabio Estevam <fabio.estevam@....com>
Subject: Re: [PATCH V7 1/4] Documentation/devicetree/bindings: b850v3_lvds_dp

Hi Peter,

Thank you for the patch.

On Sunday 01 Jan 2017 21:24:29 Peter Senna Tschudin wrote:
> Devicetree bindings documentation for the GE B850v3 LVDS/DP++
> display bridge.
> 
> Cc: Martyn Welch <martyn.welch@...labora.co.uk>
> Cc: Martin Donnelly <martin.donnelly@...com>
> Cc: Javier Martinez Canillas <javier@...hile0.org>
> Cc: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> Cc: Philipp Zabel <p.zabel@...gutronix.de>
> Cc: Rob Herring <robh@...nel.org>
> Cc: Fabio Estevam <fabio.estevam@....com>
> Signed-off-by: Peter Senna Tschudin <peter.senna@...labora.com>
> ---
> There was an Acked-by from Rob Herring <robh@...nel.org> for V6, but I
> changed the bindings to use i2c_new_secondary_device() so I removed it from
> the commit message.
> 
>  .../devicetree/bindings/ge/b850v3-lvds-dp.txt      | 39 +++++++++++++++++++
>  1 file changed, 39 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/ge/b850v3-lvds-dp.txt
> 
> diff --git a/Documentation/devicetree/bindings/ge/b850v3-lvds-dp.txt
> b/Documentation/devicetree/bindings/ge/b850v3-lvds-dp.txt new file mode
> 100644
> index 0000000..1bc6ebf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ge/b850v3-lvds-dp.txt
> @@ -0,0 +1,39 @@
> +Driver for GE B850v3 LVDS/DP++ display bridge
> +
> +Required properties:
> +  - compatible : should be "ge,b850v3-lvds-dp".
> +  - reg : should contain the main address which is used to ack the
> +    interrupts and address for edid.
> +  - reg-names : comma separeted list of register names. Valid values
> +    are "main", and "edid".
> +  - interrupt-parent : phandle of the interrupt controller that services
> +    interrupts to the device
> +  - interrupts : one interrupt should be described here, as in
> +    <0 IRQ_TYPE_LEVEL_HIGH>.
> +  - port : should describe the video signal connection between the host
> +    and the bridge.

A bridge has, by definition, (at least) one input and (at least) one output. 
You should thus have (at least) two ports.

> +Example:
> +
> +&mux2_i2c2 {
> +	status = "okay";
> +	clock-frequency = <100000>;
> +
> +	b850v3-lvds-dp-bridge@73  {
> +		compatible = "ge,b850v3-lvds-dp";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		reg = <0x73 0x72>;
> +		reg-names = "main", "edid";
> +
> +		interrupt-parent = <&gpio2>;
> +		interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> +
> +		port {
> +			b850v3_dp_bridge_in: endpoint {
> +				remote-endpoint = <&lvds0_out>;
> +			};
> +		};
> +	};
> +};

-- 
Regards,

Laurent Pinchart