linux-kernel - Re: [PATCH 6/7] arm64: dts: ti: k3-j721s2-common-proc-board: Enable DisplayPort-1

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Message-ID: <945e0247-a971-48de-adb1-60a1e7fe5f24@ti.com>
Date: Sat, 19 Apr 2025 14:59:47 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: Jayesh Choudhary <j-choudhary@...com>, <nm@...com>, <vigneshr@...com>,
        <devarsht@...com>, <linux-kernel@...r.kernel.org>
CC: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <kristo@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <u-kumar1@...com>
Subject: Re: [PATCH 6/7] arm64: dts: ti: k3-j721s2-common-proc-board: Enable
 DisplayPort-1


On 4/11/2025 4:21 PM, Jayesh Choudhary wrote:
> Enable DSI display for J721S2 EVM.
>
> Add the endpoint nodes to describe connection from:
> DSS => DSI Bridge => DSI to eDP bridge => DisplayPort-1
>
> Set status for all required nodes for DisplayPort-1 as 'okay'.
>
> Signed-off-by: Jayesh Choudhary <j-choudhary@...com>
> ---
>   .../dts/ti/k3-j721s2-common-proc-board.dts    | 95 +++++++++++++++++++
>   1 file changed, 95 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> index f691ae4c19e6..15a7d9b813d3 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> @@ -93,6 +93,29 @@ vdd_sd_dv: gpio-regulator-TLV71033 {
>   			 <3300000 0x1>;
>   	};
>   
> [..]
> +
> +&dss {
> +	/*
> +	 * These clock assignments are chosen to enable the following outputs:
> +	 *
> +	 * VP0 - DisplayPort SST
> +	 * VP1 - DPI0
> +	 * VP2 - DSI
> +	 * VP3 - DPI1
> +	 */

Sorry for basic question,  In this series , you are enabling only DSI 
interface.

why you need clocking for other interfaces ?


> +	status = "okay";
> [..]