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

[Vishnu Saini]

On Mon, Sep 07, 2026 at 01:40:52PM +0200, Konrad Dybcio wrote:
> 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..

I named it similar to "talos-evk-lvds-auo,g133han01.dtb", but let know if i need to remove comma.
 
> 
> > +
> >  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
I will remove the unused labels, in next revision.

> Konrad
>