[Bug 94566] [BAT SKL]igt at kms_pipe_crc_basic@suspend-read-crc-pipe-c fails suspend autoresume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94566

--- Comment #24 from Imre Deak <imre.deak at intel.com> ---
(In reply to Takashi Iwai from comment #22)
> (In reply to Imre Deak from comment #20)
> > (In reply to Takashi Iwai from comment #17)
> > > And, one more problem is that we gather up the all codecs as a single card. 
> > > Blocking a probe of one codec means to block the probe of the whole card. 
> > > So we can't take unlimited block behavior.
> > 
> > Can you still separate interface registration from HW access? I assume the
> > latter could be delay until the user first opens the device node, so you
> > could do the blocking there and register the corresponding interface earlier.
> 
> It's difficult, unfortunately.  HDMI codec may provide multiple streams (or
> even zero stream), and for knowing how many streams, we need to probe.  So,
> without probing, we don't know which device interface to provide.
>  
> And, on SKL architecture, the HDMI codec is on the same HDA bus that is
> represented as a single sound card instance. 

Why can't the HDMI codec be on a separate sound card?

> A delayed probe means the dynamic addition / removal of PCM and other 
> devices.  However, most of user-space stuff like PA doesn't work in that way 
> (although it's possible in kernel API level).  They support only the 
> card-level hotplug.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160319/c50f4a6b/attachment.html>