linux-kernel - Re: [PATCH 4/4] arm64: dts: ti: k3-am625-sk: Add DSS ports, HDMI tx & peripherals

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Date:   Thu, 28 Apr 2022 19:23:01 +0530
From:   Rahul T R <r-ravikumar@...com>
To:     Aradhya Bhatia <a-bhatia1@...com>
CC:     Vignesh Raghavendra <vigneshr@...com>, Nishanth Menon <nm@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] arm64: dts: ti: k3-am625-sk: Add DSS ports, HDMI tx
 & peripherals

On 14:38-20220427, Aradhya Bhatia wrote:
> Add DT nodes for sil9022 HDMI transmitter (tx), HDMI connector and the
> HDMI fixed master clock on the am625-sk board.
> 
> Additionally, add and connect output port for DSS (vp2), input and output
> ports for the sil9022 HDMI tx and the input port for the HDMI connector.
> 
> The sil9022 HDMI tx is connected on the i2c1 bus. The HDMI connector on
> the board is of type "a". The clock frequency of the master clock that
> supports the HDMI tx is 12.288 MHz.
> 
> The dpi output signals from the vp2 of DSS are fed into the sil9022 HDMI
> transmitter. These signals are converted into HDMI signals which are
> further passed on to the HDMI connector on the board, on which display
> can be connected via appropriate HDMI cables.
> 
> Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-am625-sk.dts | 63 ++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
> index 96414c5dacf7..9567fa4a447b 100644
> --- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
> @@ -134,6 +134,23 @@ led-0 {
>  			default-state = "off";
>  		};
>  	};
> +
> +	hdmi_mstrclk: hdmi-mstrclk {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <12288000>;
> +	};
> +
> +	hdmi: connector {
> +		compatible = "hdmi-connector";
> +		label = "hdmi";
> +		type = "a";
> +		port {
> +			hdmi_connector_in: endpoint {
> +				remote-endpoint = <&sii9022_out>;
> +			};
> +		};
> +	};
>  };
>  
>  &main_pmx0 {
> @@ -385,6 +402,38 @@ exp1: gpio@22 {
>  		pinctrl-names = "default";
>  		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
>  	};
> +
> +	sii9022: sii9022@3b {
> +		compatible = "sil,sii9022";
> +		reg = <0x3b>;
> +
> +		clocks = <&hdmi_mstrclk>;
> +		clock-names = "mclk";
> +
> +		interrupt-parent = <&exp1>;
> +		interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +
> +				sii9022_in: endpoint {
> +					remote-endpoint = <&dpi1_out>;
> +				};
> +			};
> +
> +			port@1 {
> +				reg = <1>;
> +
> +				sii9022_out: endpoint {
> +					remote-endpoint = <&hdmi_connector_in>;
> +				};
> +			};
> +		};
> +	};
>  };
>  
>  &main_i2c2 {
> @@ -450,6 +499,20 @@ &dss {
>  	pinctrl-0 = <&main_dss0_pins_default>;
>  };
>  
> +&dss_ports {
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +
> +	/* VP2: DPI Output */
> +	port@1 {
> +		reg = <1>;
> +
> +		dpi1_out: endpoint {
> +			remote-endpoint = <&sii9022_in>;
> +		};
> +	};
> +};
> +
>  &mailbox0_cluster0 {
>  	mbox_m4_0: mbox-m4-0 {
>  		ti,mbox-rx = <0 0 0>;
> -- 
> 2.36.0
>

Reviewed-by: Rahul T R <r-ravikumar@...com>