Re: [PATCH 1/2] dt-bindings: drm/bridge: Add no-hpd property

[Jayesh Choudhary]

On 21/03/23 18:08, Krzysztof Kozlowski wrote:
> On 21/03/2023 13:02, Jayesh Choudhary wrote:
> > > > +    type: boolean
> > > > +    description:
> > > > +      Set if the HPD line on the bridge isn't hooked up to anything or is
> > > > +      otherwise unusable.
> > >
> > > It's the property of the panel, not bridge. Unless you want to say that
> > > bridge physically does not have HPD? Does it follow the standard in such
> > > case?
> >
> > MHDP does have hpd. But the mhdp driver should handle the cases when the
>
> This is about bindings, not driver. Your driver can still handle this as
> it wishes.
>
> > hpd pin of bridge is not connected to that of the DP-connector. This is
> > to add support for that. (optional property)
>
> Which is indicated by panel no-hpd, right?

Actually no panel is involved in this. For TI SoC J721S2, the data 
pipeline involves the bridge whose endpoint is directly the DP connector 
with compatible 'dp-connector'. And in the binding dp-connector.yaml, 
there isn't any 'no-hpd' property for this indication.

Does this clarifies the issue? Or did I misinterpret your comment?

> Or you mean now that HPD
> physically cannot go to panel because it is cut on the bridge side? But
> isn't this the same case (from hardware/bindings point, not driver) as
> panel would not have HPD?
Warm Regards,
-Jayesh