linux-kernel - Re: [PATCH 1/3] ASoC: alc5623: Convert codec->hw_read to regmap

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Message-ID: <20111013225237.GA2952@opensource.wolfsonmicro.com>
Date:	Thu, 13 Oct 2011 23:52:37 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Arnaud Patard <arnaud.patard@...-net.org>,
	Liam Girdwood <lrg@...com>, alsa-devel@...a-project.org
Subject: Re: [PATCH 1/3] ASoC: alc5623: Convert codec->hw_read to regmap_read

On Fri, Oct 14, 2011 at 06:39:43AM +0800, Axel Lin wrote:
> 2011/10/14 Mark Brown <broonie@...nsource.wolfsonmicro.com>:

> > Probably the best thing here is to convert all these drivers to use
> > cache_bypass to read directly through the cache - the same thing will
> > then work with direct regmap usage.

> I don't complete understand "use cache_bypass to read directly through
> the cache".

Set the cache_bypass flag in the device struct.

> Or do you mean changes like below instead of calling regmap_read directly?

No, this isn't going to work.  snd_soc_read() will use the cache.
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