From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org, Liam Girdwood <lrg@ti.com>,
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Subject: Re: [PATCH 1/5] ASoC: Hold runtime PM references to components of active DAIs
Date: Wed, 07 Dec 2011 09:48:05 +0200 [thread overview]
Message-ID: <4EDF1A35.8020003@ti.com> (raw)
In-Reply-To: <1323043291-6797-1-git-send-email-broonie@opensource.wolfsonmicro.com>
On 12/05/2011 02:01 AM, Mark Brown wrote:
> Every device that implements runtime power management for DAIs is doing
> it in pretty much the same way: in the startup callback they take a
> runtime PM reference and then in the shutdown callback they release that
> reference, keeping the device active while the DAI is active. Given the
> frequency with which this is done and the obviousness of the need to keep
> the device active in this period factor the code out into the core, taking
> references on the device for each CPU DAI, CODEC DAI and DMA device in the
> core.
>
> As runtime PM is reference counted this shouldn't interfere with any
> other reference holding by the drivers, and since (in common with the
> existing implementations) we don't check for errors on enabling it
> shouldn't matter if the device actually has runtime PM enabled or not.
>
> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
prev parent reply other threads:[~2011-12-07 7:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-05 0:01 [PATCH 1/5] ASoC: Hold runtime PM references to components of active DAIs Mark Brown
2011-12-05 0:01 ` [PATCH 2/5] ASoC: Use core pm_runtime callbacks for omap-dmic Mark Brown
2011-12-05 8:02 ` Peter Ujfalusi
2011-12-05 0:01 ` [PATCH 3/5] ASoC: Use core pm_runtime callbacks for omap-mcpdm Mark Brown
2011-12-05 8:32 ` Peter Ujfalusi
2011-12-05 0:01 ` [PATCH 4/5] ASoC: Use core pm_runtime callbacks for siu_dai Mark Brown
2011-12-05 0:01 ` [PATCH 5/5] ASoC: Use core pm_runtime callbacks for fsi Mark Brown
2011-12-05 8:01 ` [PATCH 1/5] ASoC: Hold runtime PM references to components of active DAIs Peter Ujfalusi
2011-12-05 11:39 ` Mark Brown
2011-12-05 13:32 ` Peter Ujfalusi
2011-12-05 13:46 ` Mark Brown
2011-12-05 14:53 ` Peter Ujfalusi
2011-12-05 15:07 ` Mark Brown
2011-12-07 7:47 ` Peter Ujfalusi
2011-12-07 7:48 ` Peter Ujfalusi [this message]
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