From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Subject: Re: [PATCH 04/11] MFD: twl4030-audio: Add DT support
Date: Wed, 08 Aug 2012 17:16:58 +0300
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To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org, Samuel Ortiz <sameo@linux.intel.com>, Tony Lindgren <tony@atomide.com>, Dmitry Torokhov <dtor@mail.ru>, devicetree-discuss@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-omap@vger.kernel.org, Liam Girdwood <lrg@ti.com>, linux-arm-kernel@lists.infradead.org, Benoit Cousson <b-cousson@ti.com>
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On 08/08/2012 04:52 PM, Mark Brown wrote:
>> The hs_extmute is used for reducing pop noise on the headset. The sequen=
ce is
>> described in the TRM and it need to be done within the codec driver sinc=
e it
>> is within the sequence.
> =

> Is the point it's at in the sequence the end?

On both ends :o
On HS enable: the extmute has to be enabled, run the power on sequence for =
the
HS, wait for ramp, disable the HS extmute.

On stop: enable the extmute, run the sequence, wait for ramp, release the e=
xtmute.

> We can always add a patch stubbing it out as part of the series, or in a
> branch in the OF tree that we can pull in.

If you are OK with the hassle I can add a patch to the series for
include/linux/of.h to handle this.

-- =

P=E9ter