[Bug 94566] [BAT SKL]igt at kms_pipe_crc_basic@suspend-read-crc-pipe-c fails suspend autoresume
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Sat Mar 19 09:38:05 UTC 2016
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>
More information about the intel-gfx-bugs
mailing list