Re: [PATCH v3 1/2] dt-bindings: drm/bridge: Add no-hpd property

[Dmitry Baryshkov]

On Wed, Feb 05, 2025 at 12:52:52PM +0100, Krzysztof Kozlowski wrote:
> On 05/02/2025 12:50, Harikrishna Shenoy wrote:
> > From: Rahul T R <r-ravikumar@xxxxxx>
> > 
> > The mhdp bridge can work without its HPD pin hooked up to the connector,
> > but the current bridge driver throws an error when hpd line is not
> > connected to the connector. For such cases, we need an indication for
> > no-hpd, using which we can bypass the hpd detection and instead use the
> > auxiliary channels connected to the DP connector to confirm the
> > connection.
> > So add no-hpd property to the bindings, to disable hpd when not
> > connected or unusable due to DP0-HPD not connected to correct HPD 
> > pin on SOC like in case of J721S2.
> > 
> > Signed-off-by: Rahul T R <r-ravikumar@xxxxxx>
> 
> Why are you sending over and over the same? You already got feedback.
> Then you send v2. You got the same feedback.
> 
> Now you send v3?
> 
> So the same feedback, but this time: NAK

Krzysztof's email forced me to take a look at the actual boards that you
are trying to enable. I couldn't stop by notice that the HPD signal
_is_ connected to a GPIO pin. Please stop hacking the bridge driver and
use the tools that are already provided to you: add the HPD pin to the
dp-controller device node. And then fix any possible issues coming from
the bridge driver not being able to handle HPD signals being delivered
by the DRM framework via the .hpd_notify() callback.

TL;DR: also a NAK from my side, add HPD gpio to dp-controller.

-- 
With best wishes
Dmitry