在 2026-06-11四的 13:26 +0800，Pengyu Luo写道： > On Tue, 09 Jun 2026 00:26:20 +0800, Icenowy Zheng > <[email protected]> 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
