linux-kernel - Re: [PATCH] ASoC: wm8804: Allow control of master clock divider in PLL generation

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Message-ID: <52D979F2.8070202@koalo.de>
Date:	Fri, 17 Jan 2014 19:44:02 +0100
From:	Florian Meier <florian.meier@...lo.de>
To:	Mark Brown <broonie@...nel.org>
CC:	Daniel Matuschek <daniel@...uschek.net>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	Dimitris.Papastamos@...fsonmicro.com,
	Liam Girdwood <lgirdwood@...il.com>, perex@...ex.cz,
	Takashi Iwai <tiwai@...e.de>,
	patches@...nsource.wolfsonmicro.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: wm8804: Allow control of master clock divider in
 PLL generation

On 01/17/2014 07:33 PM, Mark Brown wrote:
> On Fri, Jan 17, 2014 at 07:06:24PM +0100, Florian Meier wrote:
>>
> Intentionally off-list?

Oh no - I am sorry!

>> If I remember correctly the error was
>> "codec can not start from non-off bias with idle_bias_off==true"
> 
>> I think the solution is just to set idle_bias_off = false and everything
>> seems to be working with that. I just don't know if there might be any
>> side effects.
> 
> Setting it to false increases power consumption since the device is
> kept more powered on when idle but reduces startup time from idle.  For
> digital only devices like the wm8804 there shouldn't be any reason to
> keep it powered up when not in use, the startup time is generally
> negligable anyway.
> 

So a better solution would be to set SND_SOC_BIAS_OFF instead of
SND_SOC_BIAS_STANDBY at the end of probe?
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