[alsa-devel] [PATCH] AD1986A 6-channel bugs

[Takashi Iwai]

At Fri, 26 Oct 2007 17:19:31 +0800,
zhejiang wrote:
> 
> On Thu, 2007-10-25 at 10:05 +0200, Takashi Iwai wrote:
> > At Thu, 25 Oct 2007 15:05:40 +0800,
> > zhejiang wrote:
> > > 
> > > Hi,
> > > 
> > > I have a ICH8M + AD1986A machine.
> > > 
> > > In 6 channel modes, if adjust the volumes when playing 2-channel or
> > > 4-channel music, codec will be muted and all widget's Amp-Out vals will
> > > be reset. If you play 2-channel files in 6 channel modes,there is noise
> > > in the jacks.
> > > 
> > > By doing experiments, I found that the 6-channel bug was caused by
> > > sharing channels.
> > > 
> > > If play 2-channel audio file,the rest channels will share channels with
> > > the first 2-channel. 
> > > 
> > > The HDA spec doesn’t define the exact behavior under such circumstances.
> > > 
> > > Majority of the codec chips support sharing channel, but seem that
> > > AD1986A doesn’t support.
> > > 
> > > I wrote a patch and tested it in my hardware,now it works well.
> > 
> > Thanks!  It's been a bug that I hardly understood what was wrong.
> > 
> > IMO, it's better to have a flag in hda_multi_out rather than
> > hardcoding the codec id there.
> > 
> > Could you check whether the patch below works?
> > 
> 
> I have tested them and they are okay! Thanks!

Great, now I committed to ALSA HG tree.

Thanks for testing!


Takashi