[PATCH v3 0/7] drm/bridge_connector: perform HPD enablement automatically

[Tomi Valkeinen]

On 28/12/2022 23:58, Dmitry Baryshkov wrote:
> On 02/11/2022 20:06, Dmitry Baryshkov wrote:
>>  From all the drivers using drm_bridge_connector only iMX/dcss and OMAP
>> DRM driver do a proper work of calling
>> drm_bridge_connector_en/disable_hpd() in right places. Rather than
>> teaching each and every driver how to properly handle
>> drm_bridge_connector's HPD, make that automatic.
>>
>> Add two additional drm_connector helper funcs: enable_hpd() and
>> disable_hpd(). Make drm_kms_helper_poll_* functions call them (as this
>> is the time where the drm_bridge_connector's functions are called by the
>> drivers too).
> 
> Since we are at the beginning of the development window, gracious ping 
> for this patchset.
> 
> It would be nice to finally handle the bridge_connector's hpd properly. 
> Calling drm_bridge_connector_enable_hpd() from 
> drm_bridge_connector_init() is not a proper way to do this. It results 
> in calling bridge->funcs->hpd_enable() before the rest of the pipeline 
> was set up properly.

For the series:

Reviewed-by: Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>

I've been using this series in my local branch for quite a while to fix 
the HPD issues. Works for me.

I still think the "fix" aspect should be highlighted more here, as the 
current upstream triggers a WARN for "Hot plug detection already 
enabled" (at least) on OMAP.

  Tomi