[Bug 89419] [SKL][Audio][HD-A Display]: Can't detect Display audio codec if not connect HDMI and DP monitor when boot up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89419

--- Comment #20 from Libin Yang <libin.yang at intel.com> ---
Hi Jani

(In reply to Jani Nikula from comment #18)
> (In reply to Imre Deak from comment #17)
> > I'm not aware of any other interaction between the gfx and sound driver
> > besides what is done via the i915/audio component framework.
> 
> Basically what we do in hsw_audio_codec_enable() should trigger an irq in
> the audio driver to, well, whatever it needs to do. It works for HSW/BDW, I
> don't see why not for SKL. I didn't spot any changes in the audio
> programming sequence in bspec, so my conclusion is that the audio driver
> needs to be checked. (And indeed we've already pointed out the powerwell
> enabling/disabling missing for SKL.)

Yes. The audio driver need the flag. I will add it later. But after adding the
flag, the HDMI codec still sometime can't be recognized.

Thanks for the clue, I will check whether the audio driver is triggered
correctly when hsw_audio_codec_enable() is called.

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