(snip)
> > > > > And I'm not sure whether HDMI audio is played
> > > > > while DPMS is off. I haven't tested it.
> > > >
> > > > It will go silence on DPMS. I noticed this while doing long term HDMI
> > > > audio playback tests. This should better be fixed in future on the
> > > > graphics side.
> > >
> > > Hm, but I wonder what could be done alternatively.
> > > Hopefully there is a register for video-only control...
> >
> > There may be some mode that can keep video off while still keep
> > minimal signals to play HDMI sound?
>
> Let's hope :)
Looks very possible, here is the clue of hardware support:
TRANS_DP_CTL - Transcoder DisplayPort Control
bit 26: Transcoder DP Audio Only Mode
Thanks,
Fengguang
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