linux-kernel - RE: [PATCH] ASoC: da7219: Fix pole orientation detection on OMTP headsets when playing music

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Date:   Thu, 9 Feb 2023 03:05:35 +0000
From:   David Rau <david.rau.zg@...esas.com>
To:     Guenter Roeck <linux@...ck-us.net>
CC:     Mark Brown <broonie@...nel.org>, "perex@...ex.cz" <perex@...ex.cz>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "support.opensource@...semi.com" <support.opensource@...semi.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] ASoC: da7219: Fix pole orientation detection on OMTP
 headsets when playing music



-----Original Message-----
From: Guenter Roeck <groeck7@...il.com> On Behalf Of Guenter Roeck
Sent: Thursday, February 9, 2023 02:04
To: David Rau <david.rau.zg@...esas.com>
Cc: Mark Brown <broonie@...nel.org>; perex@...ex.cz; lgirdwood@...il.com; tiwai@...e.com; support.opensource@...semi.com; alsa-devel@...a-project.org; linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: da7219: Fix pole orientation detection on OMTP headsets when playing music

On Tue, Feb 07, 2023 at 02:42:14AM +0000, David Rau wrote:
>> 
>> > You mean just keep the above two patches and revert 969357ec94e6 ?
>> > Sure, I can do that, but feedback from the field would take some
>> > 2-3 months. Is that what you recommend to do for now ?
>> 
>> > Thanks,
>> > Guenter
>> 
>> Thanks for the feedback.
>> What I mean is just do rollback to remove the "sleep" patch I did in your repository.
>> 
>> After the rollback, could you please let me know the average number of crashes per affected system with the same test conditions?
>> Will it still take some 2-3 months?
>> 
>The msleep() patch has been reverted in R111 and dev releases of ChromeOS. I did not get permission to land the revert in R110, meaning we'll continue to see the crashes there. 
>R111 is expected to go to Beta shortly, so we should get _some_ feedback in the next few weeks.
>Still, it would be great to get a more permanent fix for the underlying problem. Also, the msleep() patch is still upstream, so a solution is still needed there.
>I can try to get and play with one of the affected Chromebooks, but I don't think that would help much since we still don't know what the undocumented ground switch is supposed to do.
Enable the GND switch earlier is needed to ensure the stable and smooth Jack detection.

>Thanks,
>Guenter

Thanks for the kind explanation and feedback.
I am verifying another method which do the msleep() in the individual schedule work to avoid such crash issue.

Would you please let me know how to reproduce this crash phenomenon?
Then I can ensure the new solution is stronger and solve this problem as well.

Thanks.
David