linux-kernel - Re: [alsa-devel] [PATCH] ASoC: rt5677: Reintroduce I2C device IDs

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Date:   Thu, 24 Aug 2017 16:28:29 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Tom Rini <trini@...sulko.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Oder Chiou <oder_chiou@...ltek.com>,
        alsa-devel@...a-project.org, Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.com>,
        Mark Brown <broonie@...nel.org>,
        Bard Liao <bardliao@...ltek.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: rt5677: Reintroduce I2C device IDs

On Thu, 24 Aug 2017 02:05:25 +0200,
Tom Rini wrote:
> 
> On Wed, Aug 23, 2017 at 01:39:12PM -0400, Tom Rini wrote:
> > On Wed, Aug 23, 2017 at 05:29:33PM +0300, Andy Shevchenko wrote:
> > 
> > > On Tue, 2017-08-22 at 21:51 -0400, Tom Rini wrote:
> > > > Not all devices with ACPI and this combination of sound devices will
> > > > have the required information provided via ACPI.  Reintroduce the I2C
> > > > device ID to restore sound functionality on on the Chromebook 'Samus'
> > > > model.
> > > 
> > > > This is a regression from v4.12 on my laptop (a Chromebook 'Samus'
> > > > that's not running ChromeOS).  My fault for getting out of the habit
> > > > of
> > > > trying -rc1 when it comes out and not spotting this sooner.  I'm not
> > > > 100% sure if this fix is correct for all cases as I'm only able to
> > > > test
> > > > my hardware here, and this does fix my laptop.
> > > 
> > > Are you sure the commit ddc9e69b9dc2 ("ASoC: rt5677: Hide platform data
> > > in the module sources") does not fix your issue?
> > 
> > As that's not in master yet I can't tell.  Can you give me a pointer to
> > somewhere?  Thanks!
> 
> OK, my bad, it has a different hash upstream, but no, that change
> doesn't fix things as I see the problem on top of Linus' tree.  Thanks!

Could you double-check?  Your Oops likely comes from the NULL
id->driver_type reference that is removed by the commit ddc9e69b9dc2.

If you still get an Oops, we need to decode it properly now to
understand what's going on.


thanks,

Takashi