linux-kernel - Re: [PATCH v2 7/7] arm64: dts: ti: k3-am68-sk: Enable DSI on DisplayPort-0

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3ab4f645-8062-4ed6-8fd3-96dd3eb6de0b@ti.com>
Date: Tue, 15 Jul 2025 15:18:44 +0530
From: Jayesh Choudhary <j-choudhary@...com>
To: Vignesh Raghavendra <vigneshr@...com>, <nm@...com>,
        <devicetree@...r.kernel.org>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devarsht@...com>, <u-kumar1@...com>
Subject: Re: [PATCH v2 7/7] arm64: dts: ti: k3-am68-sk: Enable DSI on
 DisplayPort-0

Hi,

On 26/06/25 12:04, Vignesh Raghavendra wrote:
> 
> 
> On 24/06/25 13:56, Jayesh Choudhary wrote:
>> Enable DSI support for AM68-SK platform.
>>
>> Add DT node for DSI2eDP bridge. The DSI to eDP bridge is sn65dsi86
>> on the board.
>>
>> Add the endpoint nodes to describe connection from:
>> DSS => DSI => SN65DSI86 bridge => DisplayPort-0
>>
>> Set status for all required nodes for DisplayPort-0 as 'okay'.
>>
>> Signed-off-by: Jayesh Choudhary <j-choudhary@...com>
>> ---
>>   .../boot/dts/ti/k3-am68-sk-base-board.dts     | 96 +++++++++++++++++++
>>   1 file changed, 96 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
>> index 5fa70a874d7b..aef63ae2994c 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
>> @@ -135,6 +135,35 @@ transceiver4: can-phy3 {
>>   		max-bitrate = <5000000>;
>>   	};
>>   
>> +	edp0_refclk: clock-edp0-refclk {
>> +		#clock-cells = <0>;
>> +		compatible = "fixed-clock";
>> +		clock-frequency = <19200000>;
>> +	};
>> +
>> +	dp0_pwr_3v3: fixedregulator-dp0-pwr {
> 
> use std node name: regulator-...

Okay! In v3, I will change this.

> 
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "dp0-pwr";
>> +		regulator-min-microvolt = <3300000>;
>> +		regulator-max-microvolt = <3300000>;
>> +		gpio = <&exp2 2 GPIO_ACTIVE_HIGH>;     /*P0 - DP0_3V3 _EN */
>> +		enable-active-high;
>> +		regulator-always-on;
>> +	};
>> +
>> +	dp0: dp0-connector {
>> +		compatible = "dp-connector";
>> +		label = "DP0";
>> +		type = "full-size";
>> +		dp-pwr-supply = <&dp0_pwr_3v3>;
>> +
>> +		port {
>> +			dp0_connector_in: endpoint {
>> +				remote-endpoint = <&dp0_out>;
>> +			};
>> +		};
>> +	};
>> +
>>   	connector-hdmi {
>>   		compatible = "hdmi-connector";
>>   		label = "hdmi";
>> @@ -605,6 +634,39 @@ exp2: gpio@20 {
>>   		gpio-line-names = "HDMI_PDn","HDMI_LS_OE",
>>   				  "DP0_3V3_EN","eDP_ENABLE";
>>   	};
>> +
>> +	dsi_edp_bridge: dsi-edp-bridge@2c {
>> +		compatible = "ti,sn65dsi86";
>> +		reg = <0x2c>;
>> +		clock-names = "refclk";
>> +		clocks = <&edp0_refclk>;
>> +		enable-gpios = <&exp2 3 GPIO_ACTIVE_HIGH>;
>> +		vpll-supply = <&vsys_io_1v8>;
>> +		vccio-supply = <&vsys_io_1v8>;
>> +		vcca-supply = <&vsys_io_1v2>;
>> +		vcc-supply = <&vsys_io_1v2>;
>> +
>> +		dsi_edp_bridge_ports: ports {
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +
>> +			port@0 {
>> +				reg = <0>;
>> +
>> +				dp0_in: endpoint {
>> +					remote-endpoint = <&dsi0_out>;
>> +				};
>> +			};
>> +
>> +			port@1 {
>> +				reg = <1>;
>> +
>> +				dp0_out: endpoint {
>> +					remote-endpoint = <&dp0_connector_in>;
>> +				};
>> +			};
>> +		};
>> +	};
>>   };
>>   
>>   &main_sdhci1 {
>> @@ -699,6 +761,15 @@ dpi_out0: endpoint {
>>   			remote-endpoint = <&tfp410_in>;
>>   		};
>>   	};
>> +
>> +	/* DSI */
>> +	port@2 {
>> +		reg = <2>;
>> +
>> +		dpi0_out: endpoint {
>> +			remote-endpoint = <&dsi0_in>;
>> +		};
>> +	};
>>   };
>>   
>>   &serdes_ln_ctrl {
>> @@ -756,3 +827,28 @@ &usb0 {
>>   	phys = <&serdes0_usb_link>;
>>   	phy-names = "cdns3,usb3-phy";
>>   };
>> +
>> +&dphy_tx0 {
>> +	status = "okay";
>> +};
>> +
>> +&dsi0 {
>> +	status = "okay";
>> +};
>> +
>> +&dsi0_ports {
>> +
>> +	port@0 {
>> +		reg = <0>;
>> +		dsi0_out: endpoint {
>> +			remote-endpoint = <&dp0_in>;
>> +		};
>> +	};
>> +
>> +	port@1 {
>> +		reg = <1>;
>> +		dsi0_in: endpoint {
>> +			remote-endpoint = <&dpi0_out>;
>> +		};
>> +	};
>> +};
>