linux-kernel - Re: [alsa-devel] [PATCH] ASoC: da7219: check SRM lock in trigger callback

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Message-ID: <20200212115915.GC4028@sirena.org.uk>
Date:   Wed, 12 Feb 2020 11:59:15 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        "Sridharan, Ranjani" <ranjani.sridharan@...el.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        Support Opensource <Support.Opensource@...semi.com>,
        Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Chiang, Mac" <mac.chiang@...el.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        "Lu, Brent" <brent.lu@...el.com>,
        "cychiang@...gle.com" <cychiang@...gle.com>
Subject: Re: [alsa-devel] [PATCH] ASoC: da7219: check SRM lock in trigger
 callback

On Wed, Feb 12, 2020 at 10:16:54AM +0000, Adam Thomson wrote:

> So far I've not found a way in the codec driver to be able to get around this.
> I spent a very long time with Sathya in the early days (Apollo Lake) looking at
> options but nothing would fit which is why I have the solution that's in place
> right now. We could probably reduce the number of rechecks before timeout in the
> driver but that's really just papering over the crack and there's still the
> possibility of noise later when SRM finally does lock.

This really needs the componentisation refactoring I think, that way we
can annotate individual devices and links with what they need rather
than essentially guessing about what works most of the time which is
more or less what we do at the minute.  Like you say as things are at
the minute there's a lot of crack papering going on.

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