linux-kernel - Re: [PATCH] ASoC: rt5682: Use a maple tree based register cache

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Date:   Tue, 23 May 2023 14:36:54 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Oder Chiou <oder_chiou@...ltek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: rt5682: Use a maple tree based register cache



On 5/23/23 14:28, Mark Brown wrote:
> On Tue, May 23, 2023 at 02:24:53PM -0500, Pierre-Louis Bossart wrote:
> 
>> Wondering if this is the root cause of the regression we're seeing in
>> [1] on a Chromebook with rt5682 in SoundWire mode?
> 
>> I don't see any other changes to this codec driver and the first problem
>> detected seemed to happen when we did an upstream merge last week.
>> Unfortunately the last merge was on April 24 (sof-dev-rebase-20230424)
>> which is just the day before this commit was added...
> 
> Try a revert?

I can try, unfortunately that device is not directly testable with a
simple PR test so it'll take time.

I was just hoping that someone smarter than me had an explanation on the
locking issue. We only use interrupt threads and workqueues, not sure
why sleeping is an issue.