Subject: Re: [PATCH] dt-bindings: display: rockchip: add document for rk3066 hdmi

From: Rob Herring <[email-masked]>
Date: Mon, 25 Feb 2019 10:59:23 -0600

On Fri, Feb 01, 2019 at 01:32:35PM +0100, Johan Jonker wrote:
> This patch adds a binding that describes the HDMI controller for
> rk3066.

This is not using the DW block like other Rockchip SoCs (IIRC)? 

> 
> Signed-off-by: Johan Jonker <[email-masked]>
> ---
>  .../display/rockchip/rk3066_hdmi-rockchip.txt      | 60 ++++++++++++++++++++++

Using the compatible string plus '.txt' is the preferred naming.

>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/rockchip/rk3066_hdmi-rockchip.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rk3066_hdmi-rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/rk3066_hdmi-rockchip.txt
> new file mode 100644
> index 000000000..6a8f3754f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/rockchip/rk3066_hdmi-rockchip.txt
> @@ -0,0 +1,60 @@
> +Rockchip specific extensions for rk3066 HDMI
> +============================================
> +
> +Required properties:
> +- compatible:
> +	"rockchip,rk3066-hdmi";
> +- reg:
> +	Physical base address and length of the controller's registers.
> +- clocks, clock-names:
> +	Phandle to HDMI controller clock, name should be "hclk".
> +- interrupts:
> +	HDMI interrupt number.
> +- power-domains:
> +	Phandle to the RK3066_PD_VIO power domain.
> +- rockchip,grf:
> +	This soc uses GRF regs to switch the HDMI TX input between vop0 and vop1.
> +- ports:
> +	Contains one port node with two endpoints, numbered 0 and 1,
> +	connected respectively to vop0 and vop1.

You should have an output port to an hdmi-connector node (or bridge) as 
well.

> +- pinctrl-0, pinctrl-name:
> +	Switch the iomux for the HPD/I2C pins to HDMI function.
> +
> +Example:
> +	hdmi: hdmi@10116000 {
> +		compatible = "rockchip,rk3066-hdmi";
> +		reg = <0x10116000 0x2000>;
> +		interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&cru HCLK_HDMI>;
> +		clock-names = "hclk";
> +		power-domains = <&power RK3066_PD_VIO>;
> +		rockchip,grf = <&grf>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&hdmii2c_xfer>, <&hdmi_hpd>;
> +		status = "disabled";

Don't show status in examples.

> +
> +		hdmi_in: port {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			hdmi_in_vop0: endpoint@0 {
> +				reg = <0>;
> +				remote-endpoint = <&vop0_out_hdmi>;
> +			};
> +			hdmi_in_vop1: endpoint@1 {
> +				reg = <1>;
> +				remote-endpoint = <&vop1_out_hdmi>;
> +			};
> +		};
> +	};
> +
> +&pinctrl {
> +		hdmi {
> +			hdmi_hpd: hdmi-hpd {
> +				rockchip,pins = <0 RK_PA0 1 &pcfg_pull_default>;
> +			};
> +			hdmii2c_xfer: hdmii2c-xfer {
> +				rockchip,pins = <0 RK_PA1 1 &pcfg_pull_none>,
> +						<0 RK_PA2 1 &pcfg_pull_none>;
> +			};
> +		};
> +};
> -- 
> 2.11.0
> 

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