[PATCH] drm/bridge_connector: enable HPD by default if supported

[Nikita Yushchenko]

>> Hotplug events reported by bridge drivers over drm_bridge_hpd_notify()
>> get ignored unless somebody calls drm_bridge_hpd_enable(). When the
>> connector for the bridge is bridge_connector, such a call is done from
>> drm_bridge_connector_enable_hpd().
>>
>> However drm_bridge_connector_enable_hpd() is never called on init paths,
>> documentation suggests that it is intended for suspend/resume paths.
> 
> Hmmmm... I'm in two minds about this. The problem description is
> correct, but I wonder if HPD should be enabled unconditionally here, or
> if this should be left to display drivers to control.
> drivers/gpu/drm/imx/dcss/dcss-kms.c enables HPD manually at init time,
> other drivers don't.
> 
> It feels like this should be under control of the display controller
> driver, but I can't think of a use case for not enabling HPD at init
> time. Any second opinion from anyone ?

Hi.

Can we somehow move forward here?..