linux-kernel - Re: [PATCH] ASoC: codecs: wm8753: Fix DAI mode switching

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Date:	Mon, 07 Feb 2011 19:10:25 +0000
From:	Liam Girdwood <lrg@...mlogic.co.uk>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: codecs: wm8753: Fix DAI mode switching

On Sun, 2011-02-06 at 10:04 +0100, Lars-Peter Clausen wrote:
> The wm8753 codec supports switching between different DAI modes.
> The current drivers tries to implement this by changing the DAI driver at
> runtime. But to properly work this would require support from the ASoC core.
> 
> So this patch takes a different approch on how the DAI mode switching is
> implemented.
> 
> The only difference, from a driver point of view, between the different DAI modes
> is how to program the DAI format to the hardware. So what this patch is, it
> stores the current format for each DAI in the drivers private struct and when
> the DAI mode is changed the format gets simply reprogrammed according to the
> new DAI mode.
> 
> Futhermore this patch restricts the changing of the DAI format to when the
> codec is inactive.
> 
> Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>

Acked-by: Liam Girdwood <lrg@...mlogic.co.uk>
-- 
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk

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