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

[Jayesh Choudhary <j-choudhary@ti.com>]

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