[[RFC]DPU PATCH 2/4] dt-bindings: drm/bridge: Document sn65dsi86 bridge bindings

[Sean Paul]

On Wed, Apr 18, 2018 at 05:50:00PM +0530, Sandeep Panda wrote:
> Document the bindings used for the sn65dsi86 DSI to eDP bridge.
> 

Please add a changelog to your patches so reviewers know what has changed
between patch versions. 

> Signed-off-by: Sandeep Panda <spanda at codeaurora.org>
> ---
>  .../bindings/display/bridge/ti,sn65dsi86.txt       | 60 ++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.txt b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.txt
> new file mode 100644
> index 0000000..9e2612e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.txt
> @@ -0,0 +1,60 @@
> +SN65DSI86 DSI to eDP bridge chip
> +--------------------------------
> +
> +This is the binding for Texas Instruments SN65DSI86 bridge.
> +
> +Required properties:
> +- compatible: Must be "ti,sn65dsi86"
> +- reg: i2c address of the chip, 0x2d as per datasheet
> +- enable-gpios: OF device-tree gpio specifications for bridge_en pin

The datasheet only has one enable pin, why gpios?

> +
> +- vccio-supply: A 1.8V supply that powers up the digital IOs.
> +- vcca-supply: A 1.2V supply that powers up the analog circuits.
> +
> +Optional properties:
> +
> +- irq-gpios: OF device-tree gpio specification for interrupt pin

>From the last review, Rob said, 'Use "interrupts" property instead.'

You didn't provide responses to prior review comments, so it's unclear whether
you've intentionally or unintentionally ignored him :)

Sean

> +
> +Required nodes:
> +
> +This device has two video ports. Their connections are modelled using the
> +OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
> +
> +- Video port 0 for DSI input
> +- Video port 1 for eDP output
> +
> +Example
> +-------
> +
> +edp-bridge at 2d {
> +	compatible = "ti,sn65dsi86";
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	reg = <0x2d>;
> +
> +	enable-gpios = <&msmgpio 33 GPIO_ACTIVE_HIGH>;
> +
> +	vccio-supply = <&pm8916_l17>;
> +	vcca-supply = <&pm8916_l6>;
> +
> +	ports {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		port at 0 {
> +			reg = <0>;
> +
> +			edp_bridge_in: endpoint {
> +				remote-endpoint = <&dsi_out>;
> +			};
> +		};
> +
> +		port at 1 {
> +			reg = <1>;
> +
> +			edp_bridge_out: endpoint {
> +				remote-endpoint = <&edp_panel_in>;
> +			};
> +		};
> +	};
> +}
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS