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SubjectRe: [PATCH v3 1/4] dt-bindings: display: Add Himax HX8394 panel controller
On Tue, Dec 27, 2022 at 8:37 PM Jagan Teki <jagan@amarulasolutions.com> wrote:
>
> On Wed, Dec 28, 2022 at 12:58 AM Javier Martinez Canillas
> <javier@dowhile0.org> wrote:
> >
> > Hello Jagan,
> >
> > On Tue, Dec 27, 2022 at 7:16 PM Jagan Teki <jagan@amarulasolutions.com> wrote:
> >
> > [...]
> >
> > > > +allOf:
> > > > + - $ref: panel-common.yaml#
> > > > +
> > > > +properties:
> > > > + compatible:
> > > > + enum:
> > > > + # HannStar HSD060BHW4 5.99" 720x1440 TFT LCD panel
> > > > + - hannstar,hsd060bhw4
> > >
> > > Parent controller can have a compatible where the associated panels
> > > will be enum list.
> > >
> >
> > I'm not sure to follow what you meant. Could you please elaborate?
>
> compatible:
> items:
> - enum:
> - hannstar,hsd060bhw4
> - const: himax,hx8394
>
> himax,hx8394 is the actual controller and is denoted as fallback compatible.
>

I see. Do you have an example of a panel controller that does this? I
don't see that much value in doing this since you want the DTS to
describe the actual HW and so want the panel I believe.

But also there isn't an of_device_id entry for this fallback
controller compatible string. Feel free to propose that as a follow-up
if you think it is worth doing so.

Best regards,
Javier

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