[Intel-gfx] [PATCH v2 6/9] drm/i915: Disable all infoframes when turning off the HDMI port

[Konduru, Chandra]

> > > > > Currently we just disable the GCP infoframe when turning off the port.
> > > > > That means if the same transcoder is used on a DP port next, we might
> > > > > end up pushing infoframes over DP, which isn't intended. Just disable
> > > >
> > > > Wonder how it is working. May be it is ok, or never hit using a previously
> > > > used transcoder for HDMI port for DP.
> > > >
> > > > By the way, you mean end up pushing "other" infoframes over DP?
> > >
> > > We don't send infoframes over DP at all currently. Or I should say we
> > > never intended to send them. After this patch that should even be true.
> > > Well, unless the BIOS already enables them and we just fire up a DP port
> > > using the transcoder in question. So I suppose we should really have the
> > > DP code clear the infoframe settings explicitly, or we should clear them
> > > during the sanitize phase.
> >
> > Agree that DP code path should clear the infoframe settings explicitly.
> > As you are already touching this code, will you plan to handle it?
> 
> I don't think I'll go there now. It would require quite a bit more work
> to expose the infoframe stuff to the DP code. DP + infoframes in general
> sounds like a good project for someone else to figure out. A quick
> glance at the DP spec suggests that we should at least send the audio
> infoframe.

OK, may be binned for future.