linux-kernel - Re: Thinkpad hda regression in 3.3

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Date:	Fri, 13 Apr 2012 15:29:41 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Josh Boyer <jwboyer@...hat.com>
Cc:	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org, kernel-team@...oraproject.org
Subject: Re: Thinkpad hda regression in 3.3

At Fri, 13 Apr 2012 09:23:52 -0400,
Josh Boyer wrote:
> 
> On Fri, Apr 13, 2012 at 03:07:07PM +0200, Takashi Iwai wrote:
> > At Fri, 13 Apr 2012 08:43:06 -0400,
> > Josh Boyer wrote:
> > > 
> > > Hi Takashi and Jaroslav,
> > > 
> > > We've had a number of bugs reported about sound not working correctly on
> > > various models of Thinkpad machines in the 3.3 kernel.  I've listed them
> > > below.
> > > 
> > > I looked through the commits and found:
> > > 
> > >     commit 29c5fbbcfefba5225a6783683c46c39e10877703:
> > > 
> > >     ALSA: HDA: Use model=auto for Thinkpad T510
> > > 
> > >     The user reports that model=auto works fine for him. Using
> > >     model=auto bring in new features such as jack detection notification
> > >     to userspace.
> > > 
> > > I did a local build here with that comment reverted and so far most of
> > > the people reported their sound to be working again.  The trivial revert
> > > patch is below in case you want it.
> > 
> > Could you get alsa-info.sh output on the non-working T510?
> > If it's really about the built-in speaker or headphone jack, I doubt
> > it's rahter the muted output in mixer.  I see only "me too" in the bug
> > report, which doesn't help much to diagnose the problem.
> 
> OK, I've asked for that.
> 
> > I've got a few positive feedbacks of T410 and T510, so basically the
> > driver should work.  But I know the problem of docking-station (see
> > below).
> > 
> > 
> > > It seems there are multiple models that have PCI ID 17aa:215e and using
> > > model=auto does not work for them all.  It particularly messes with
> > > machines using a docking station for some reason.
> > > 
> > > Aside from just reverting the above commit, do you have other thoughts
> > > on how to fix this?
> > 
> > The problem regarding the docking station is basically a BIOS issue.
> > ThinkPad BIOS doesn't expose the pins for docking stations at all.
> > We have already a workaround for X200, and similar others would be
> > needed for T410, T420, etc.
> > 
> > For testing, you don't need even patch the driver.  When the driver is
> > built with CONFIG_SND_HDA_PATCH_LOADER=y, create a file containing the
> > below as /lib/firmware/alsa-tp-dock:
> > 
> > ================================================================
> > [codec]
> > 0x14f15069 0x17aa21a4 0
> > 
> > [pincfg]
> > 0x1a 0x21a11000
> > 0x1c 0x23014250
> > ================================================================
> 
> The above is for the X200 docking station, correct?  So it should work
> with an x201 thinkpad in an x200 dock.

It's for T410/T510 dock.  But X201 uses the same codec chip, so this
could be used, too.  Just give it a try.


Takashi
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