From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?P=E9ter?= Ujfalusi <peter.ujfalusi@ti.com>
Subject: Re: [PATCH] ASoC: twl6040: Workaround for headset DC
	offset caused pop noise
Date: Wed, 12 Oct 2011 13:45:33 +0300
Message-ID: <5817000.NdMGYPik3n@barack>
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To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org, Liam Girdwood <lrg@ti.com>, Misael Lopez Cruz <misael.lopez@ti.com>
List-Id: alsa-devel@alsa-project.org

On Wednesday 12 October 2011 10:46:25 Mark Brown wrote:
> On Wed, Oct 12, 2011 at 11:55:15AM +0300, P=E9ter Ujfalusi wrote:
> > I can not move the HS DAC power on/off to be handled by a supply
> > widget... Refcounting in a supply widget will not work for the power
> > down, since the supply widget will be turned off after the DAC widget.
> > At time when the DAC receives the PMD event the attached supply is
> > still on.
> > I can update the commit message to explicitly say that we need to turn
> > on both HS DAC at the same time, and we need to turn tem off at the
> > same time.
> I still don't understand what the problem is.  If nothing else you can
> do random register writes from an event on a supply widget...

I still have the code for the out of order McPDM shutdown which is using a =

supply widget attached to the codec's DAC/ADC.
The ordering of the two supply is not written in stone when both are attach=
ed =

to the same DAC.
Yes, I'm evaluating the possibility of the reordering the shutdown sequence=
 in =

the core as you have suggested a while back. =


For this patch: I will merge the two DAC to one, and handle both of them in=
 a =

single DAC widget. I have tested this and works fine.

--
P=E9ter