Re: [PATCH v3 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 9/5/26 3:30 AM, 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.

[...]

> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -58,6 +58,10 @@ lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo
>  dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-el2.dtb
>  lemans-evk-ifp-mezzanine-dtbs	:= lemans-evk.dtb lemans-evk-ifp-mezzanine.dtbo
>  dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-ifp-mezzanine.dtb
> +
> +lemans-evk-lvds-boe,dv215fhm-r01-dtbs := lemans-evk.dtb lemans-evk-ifp-mezzanine.dtbo lemans-evk-lvds-boe,dv215fhm-r01.dtbo
> +dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-lvds-boe,dv215fhm-r01.dtb

I have very mixed feelings regarding putting a comma in the
filename..


> +
>  dtb-$(CONFIG_ARCH_QCOM)	+= mahua-crd.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= milos-fairphone-fp6.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= milos-nothing-asteroids.dtb
> diff --git a/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso b/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso
> new file mode 100644
> index 000000000000..bd3e13c46a1e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso
> @@ -0,0 +1,113 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +
> +&{/} {
> +	model = "Qualcomm Technologies, Inc. Lemans EVK LVDS";
> +
> +	panel_lvds: panel-lvds {

nit: this label is unused

Konrad