Re: [PATCH v2 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay

[Konrad Dybcio]

On 8/13/26 7:33 PM, Vishnu Saini wrote:
> The Lemans EVK IFP mezzanine supports LVDS display output using the
> Lontium LT9211C DSI-to-LVDS bridge. The bridge is connected to the
> DSI0 output and drives a dual-channel 1920x1080 LVDS panel in
> VESA-24 mapping.
> 
> Add a DTBO overlay, lemans-evk-lvds-boe,dv215fhm-r01.dtso, that wires
> up the LT9211C bridge on I2C1 (address 0x2d) with reset on GPIO37,
> a panel-lvds node for the boe,dv215fhm-r01 panel (matched against the
> panel-simple-lvds-dual-ports binding, which supplies the panel's size
> and timing internally), and an LCD display bias regulator supplied
> through the GPIO expander. DSI power is provided by vreg_s4a.
> 
> The overlay is built as a composite DTB combining the base
> lemans-evk.dtb, the IFP mezzanine overlay, and this LVDS overlay.
> 
> Signed-off-by: Vishnu Saini <vishnu.saini@xxxxxxxxxxxxxxxx>
> ---

[...]

> +	panel_lvds: panel-lvds {
> +		compatible = "boe,dv215fhm-r01";
> +		power-supply = <&lcd_disp_bias>;
> +
> +		status = "okay";

Nodes are enabled by default unless explicitly disabled

> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +				dual-lvds-odd-pixels;
> +				panel_in_lvds_odd: endpoint {

Please keep a \n between the last property and the following subnodes

[...]

> +	lt9211c_codec: lvds-bridge@2d {
> +		compatible = "lontium,lt9211c";
> +		reg = <0x2d>;
> +		reset-gpios = <&tlmm 37 GPIO_ACTIVE_HIGH>;
> +		vccio-supply = <&vreg_s4a>;
> +
> +		status = "okay";

ditto

[...]

> +&mdss0 {
> +	status = "okay";
> +};

The DT which you overlay this atop already enables it

Konrad

> +
> +&mdss0_dsi0 {
> +	vdda-supply = <&vreg_l1c>;
> +
> +	status = "okay";
> +};
> +
> +&mdss0_dsi0_out {
> +	data-lanes = <0 1 2 3>;
> +	remote-endpoint = <&lt9211c_in>;
> +};
> +
> +&mdss0_dsi0_phy {
> +	vdds-supply = <&vreg_l4a>;
> +
> +	status = "okay";
> +};
>