[alsa-devel] [PATCH] ALSA: hda - Fix missing ELD info when using jackpoll_ms parameter

[Takashi Iwai]

At Wed, 04 Dec 2013 15:24:28 +0800,
David Henningsson wrote:
> 
> 2013-12-04 15:17, Takashi Iwai skrev:
> > At Wed,  4 Dec 2013 10:19:41 +0800,
> > David Henningsson wrote:
> >> In the case of using jackpoll_ms instead of unsol events, the jack
> >> was correctly detected, but ELD info was not refreshed on plug-in.
> >>
> >> And without ELD info, no proper restriction of pcm, which can in turn
> >> break sound output on some devices.
> >>
> >> Signed-off-by: David Henningsson <david.henningsson at canonical.com>
> >> ---
> >>   sound/pci/hda/patch_hdmi.c |   27 +++++++++++++++------------
> >>   1 file changed, 15 insertions(+), 12 deletions(-)
> >>
> >> @Takashi; feel free to add stable if you think it's worth it. (After all using
> >> the jackpoll_ms parameter is not something we usually do.) It's still a bug fix
> >> so sending to Linus tree should be okay, I believe.
> > Hrm, I vaguely remember that I gave a very similar patch for testing,
> > but it failed by some reason...
> >
> >
> 
> That indeed sounds vague. :-) At this point, is there anything required 
> on my part to help getting this bug fixed? We run into it when we're 
> backporting kernel features, i e, using graphics driver from one kernel 
> version and hda driver from another kernel version... (and in this weird 
> kernel mixup we haven't figured out why we don't get an interrupt, so as 
> a workaround I'm using jackpoll_ms until we've figured that out.)

It's in a thread in June, about
  [PATCH 1/2] ALSA: hdmi - poll eld at resume time


Takashi