Re: [PATCH 1/3] dt-bindings: display: panel: himax,hx83121a: add optional bl supply

[Icenowy Zheng]

在 2026-06-11四的 13:26 +0800，Pengyu Luo写道：
> On Tue, 09 Jun 2026 00:26:20 +0800, Icenowy Zheng
> <zhengxingda@xxxxxxxxxxx> wrote:
> > When the backlight is managed by the panel controller IC, an
> > external
> > power rail might be powering the backlight.
> > 
> > Add an optional `bl-supply` property to describe such power rail,
> > thus
> > allow disabling the backlight.
> > 
> 
> Please add it as a hwen pin, this will simplify your code later.

I am not sure whether this should be a pin or a regulator -- the DT
binding should reflect the HW fact, and LCD panel backlights usually
require a high voltage (or even a current source) that is driven by a
dedicated regulator.

Thanks,
Icenowy

> 
> > 
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/display/panel/himax,hx83121a.ya
> > ml
> > b/Documentation/devicetree/bindings/display/panel/himax,hx83121a.ya
> > ml
> > index e067a2f6d0b2..aeca3c9a599c 100644
> > ---
> > a/Documentation/devicetree/bindings/display/panel/himax,hx83121a.ya
> > ml
> > +++
> > b/Documentation/devicetree/bindings/display/panel/himax,hx83121a.ya
> > ml
> > @@ -40,6 +40,9 @@ properties:
> >    vddi-supply:
> >      description: power supply for IC
> >  
> > +  bl-supply:
> > +    description: power supply for backlight, in case it's managed
> > via DSC
> > +
> 
> s/DSC/DCS/
> 
> Best wishes,
> Pengyu