linux-kernel - Re: [PATCH 2/2] dt-bindings: display: bridge: lt8912b: document 'lontium, pn-swap' property

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Date: Thu, 11 Apr 2024 10:23:35 +0300
From: Alexandru Ardelean <alex@...uggie.ro>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	devicetree@...r.kernel.org, adrien.grassein@...il.com, 
	andrzej.hajda@...el.com, neil.armstrong@...aro.org, rfoss@...nel.org, 
	Laurent.pinchart@...asonboard.com, jonas@...boo.se, jernej.skrabec@...il.com, 
	airlied@...il.com, daniel@...ll.ch, maarten.lankhorst@...ux.intel.com, 
	mripard@...nel.org, tzimmermann@...e.de, robh@...nel.org, 
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, 
	stefan.eichenberger@...adex.com, francesco.dolcini@...adex.com, 
	marius.muresan@....ro, irina.muresan@....ro
Subject: Re: [PATCH 2/2] dt-bindings: display: bridge: lt8912b: document
 'lontium, pn-swap' property

On Sun, Apr 7, 2024 at 11:31 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> On Tue, Apr 02, 2024 at 01:59:25PM +0300, Alexandru Ardelean wrote:
> > On some HW designs, it's easier for the layout if the P/N pins are swapped.
> > The driver currently has a DT property to do that.
> >
> > This change documents the 'lontium,pn-swap' property.
> >
> > Signed-off-by: Alexandru Ardelean <alex@...uggie.ro>
> > ---
> >  .../devicetree/bindings/display/bridge/lontium,lt8912b.yaml | 6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml
> > index 2cef252157985..3a804926b288a 100644
> > --- a/Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml
> > +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml
> > @@ -24,6 +24,12 @@ properties:
> >      maxItems: 1
> >      description: GPIO connected to active high RESET pin.
> >
> > +  lontium,pn-swap:
> > +    description: Swap the polarities of the P/N pins in software.
> > +      On some HW designs, the layout is simplified if the P/N pins
> > +      are inverted.
> > +    type: boolean
> > +
>
> I'd like to point out the standard `lane-polarities` property defined at
> Documentation/devicetree/bindings/media/video-interfaces.yaml. You can
> define and use it for the corresponding endpoint in the lt8912b schema.
>

Ohhh.
Interesting :)
Many thanks for pointing this out.
This will make things much easier.
Will do a V2 with this in a week or two.
I'm traveling now.

Thanks
Alex



> >    ports:
> >      $ref: /schemas/graph.yaml#/properties/ports
> >
> > --
> > 2.44.0
> >
>
> --
> With best wishes
> Dmitry