From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Cc: alsa-devel@alsa-project.org, lrg@slimlogic.co.uk
Subject: Re: [PATCH 4/4] ASoC: tlv320dac33: Support for turning off the codec in BIAS_STANDBY
Date: Fri, 30 Apr 2010 09:41:00 +0100 [thread overview]
Message-ID: <20100430084100.GB28241@rakim.wolfsonmicro.main> (raw)
In-Reply-To: <1272612715-13387-5-git-send-email-peter.ujfalusi@nokia.com>
On Fri, Apr 30, 2010 at 10:31:55AM +0300, Peter Ujfalusi wrote:
> When the codec is in STANDBY we can actually turn it off.
> When the codec is off, than the associated regulator can be also turned
> off (if the number of users on the regulator is 0).
You can just set idle_bias_off in the CODEC and then the core will push
you down into _BIAS_OFF.
> There are few scenarios, which has to be taken care::
> 1. Analog bypass caused BIAS_STANDBY -> BIAS_ON
> We need to power on the codec, and do the chip init, but we does not
> need to execute the playback related configuration
Moving the playback related configuration into events on the DAC widgets
(or probably a supply connected to the DAC widgets) seems like a good
move for a lot of these scenarios? The core will then take care of
ensuring that the startup sequence for the playback is called for you
and the states can do what they're supposed to more directly.
next prev parent reply other threads:[~2010-04-30 8:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-30 7:31 [PATCH 0/4] ASoC: tlv320dac33: Support for turning codec off Peter Ujfalusi
2010-04-30 7:31 ` [PATCH 1/4] ASoC: tlv320dac33: Optimize power up, and restore Peter Ujfalusi
2010-04-30 7:37 ` Peter Ujfalusi
2010-04-30 7:31 ` [PATCH 2/4] ASoC: tlv320dac33: Revised module loading, and DAC33 ID read Peter Ujfalusi
2010-04-30 7:31 ` [PATCH 3/4] ASoC: tlv320dac33: Manage a pointer for snd_pcm_substream in private structure Peter Ujfalusi
2010-04-30 7:31 ` [PATCH 4/4] ASoC: tlv320dac33: Support for turning off the codec in BIAS_STANDBY Peter Ujfalusi
2010-04-30 8:41 ` Mark Brown [this message]
2010-04-30 9:45 ` Peter Ujfalusi
2010-04-30 9:56 ` Mark Brown
2010-04-30 10:10 ` Peter Ujfalusi
2010-04-30 10:23 ` [PATCH 4/4] ASoC: tlv320dac33: Support for?turning " Mark Brown
2010-04-30 10:55 ` [PATCH 4/4] ASoC: tlv320dac33: Support for turning " Peter Ujfalusi
2010-04-30 11:42 ` Mark Brown
2010-04-30 11:42 ` Peter Ujfalusi
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