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From: Liam Girdwood <lrg@slimlogic.co.uk>
To: Stephen Warren <swarren@nvidia.com>
Cc: alsa-devel@alsa-project.org, broonie@opensource.wolfsonmicro.com
Subject: Re: [PATCH] ASoC: WM8903: Implement DMIC support
Date: Wed, 20 Apr 2011 12:10:12 +0100	[thread overview]
Message-ID: <1303297812.3436.1.camel@odin> (raw)
In-Reply-To: <1303181891-25064-1-git-send-email-swarren@nvidia.com>

On Mon, 2011-04-18 at 20:58 -0600, Stephen Warren wrote:
> In addition to the currently supported analog capture path, the WM8903
> also supports digital mics.
> 
> The analog and digital capture paths are exclusive; a mux is present to
> select the capture source.
> 
> Logically, the mux exists to select the decimator's input, from either
> the ADC or DMIC block outputs. However, the ADC power domain also
> includes the DMIC interface. Consequently, this change represents the
> mux as existing immediately before the ADC, and selecting between the
> Input PGA and DMIC block outputs.
> 
> An alternative might be to represent the mux in its correct location,
> and associate the ADC power enable controls with both the real ADC, and
> a fake ADC for the DMIC?
> 
> Signed-off-by: Stephen Warren <swarren@nvidia.com>

Acked-by: Liam Girdwood <lrg@ti.com>

  reply	other threads:[~2011-04-20 11:10 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-19  2:58 [PATCH] ASoC: WM8903: Implement DMIC support Stephen Warren
2011-04-20 11:10 ` Liam Girdwood [this message]
2011-04-20 13:00 ` Mark Brown
2011-10-14 10:34 ` Julian Scheel
2011-10-14 12:16   ` Mark Brown

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