Use the following example dts overlay (.dtso) to enable single link OLDI in cloned mode. The code is also available Beyond SDK github page.

// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
/**
 * Rocktech Panel (single-link lvds) with AM62P-SK EVM in cloned mode
 *
 * AM62P-SKEVM: https://www.ti.com/tool/SK-AM62P-LP
 *
 * Copyright (C) 2024 Texas Instruments Incorporated - http://www.ti.com/
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>

&{/} {
	display0 {
		compatible = "rocktech,rk101ii01d-ct", "panel-simple";
		port {
			lcd0_in: endpoint {
				remote-endpoint = <&oldi0_dss0_out>;
			};
		};
	};

	display1 {
		compatible = "rocktech,rk101ii01d-ct", "panel-simple";
		port {
			lcd1_in: endpoint {
				remote-endpoint = <&oldi1_dss0_out>;
			};
		};
	};
};

&dss0 {
	status = "okay";
};

&oldi0_dss0 {
	status = "okay";
	ti,companion-oldi = <&oldi1_dss0>;
};

&oldi1_dss0 {
	status = "okay";
	ti,secondary-oldi;
};

&oldi0_dss0_ports {
	#address-cells = <1>;
	#size-cells = <0>;

	port@0 {
		reg = <0>;
		oldi0_dss0_in: endpoint {
			remote-endpoint = <&dss0_dpi0_out0>;
		};
	};

	port@1 {
		reg = <1>;
		oldi0_dss0_out: endpoint {
			remote-endpoint = <&lcd0_in>;
		};
	};
};

&oldi1_dss0_ports {
	#address-cells = <1>;
	#size-cells = <0>;

	port@0 {
		reg = <0>;
		oldi1_dss0_in: endpoint {
			remote-endpoint = <&dss0_dpi0_out1>;
		};
	};

	port@1 {
		reg = <1>;
		oldi1_dss0_out: endpoint {
			remote-endpoint = <&lcd1_in>;
		};
	};
};

&dss0_ports {
	#address-cells = <1>;
	#size-cells = <0>;

	/* VP1: Output to OLDI */
	port@0 {
		reg = <0>;
		#address-cells = <1>;
		#size-cells = <0>;

		dss0_dpi0_out0: endpoint@0 {
			reg = <0>;
			remote-endpoint = <&oldi0_dss0_in>;
		};
		dss0_dpi0_out1: endpoint@1 {
			reg = <1>;
			remote-endpoint = <&oldi1_dss0_in>;
		};
	};
};

• Every LCD vendor has a unique timing parameter and for (an example) Rocktech LCD, a compatible field is defined in the DTS file as shown above. The compatible field maps to a file called panel-simple.c. The file is located under the Kernel directory drivers/gpu/drm/panel. In the panel-simple.c file, the timing parameter is defined by SK-LCD1 vendor.
• For single link OLDI in cloned mode, use dss0 drives the video signals to both OLDI TX0 and OLDI TX1. In cloned mode, both olditx IPs are enabled and as a result, there are two endpoints under dss0 vp0.
• What differentiates this mode from OLDI (Dual Link) mode is the abscence of dual-lvds-odd-pixels and dual-lvds-even-pixels, while retaining the companion node, which enforces Single Link Cloned mode.
• There are two separate display nodes and each of them has a single port (port@0).