The function that sets the delay (dc_link_enable_hpd_filter), doesn't seem to
be called anywhere as far as I can see. But I'm a complete noob here so might
be missing something. (In reply to krutoileshii from comment #17)
> I think this could be related to this commit
> b0c4e977522c34e20ad54ff4ca104129a7cfdeca which removed the delay.: Below
> patchset seems to be the likely cause as it touches the HDMI portion.
> 
> https://lists.freedesktop.org/archives/amd-gfx/2018-February/018956.html