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Some devices can usefully run audio while the Linux system is suspended. One of the most common examples is smartphone systems, which are normally designed to allow audio to be run between the baseband and the CODEC without passing through the CPU and so can suspend the CPU when on a voice call for additional power savings. Support such systems by providing an API snd_soc_dapm_ignore_suspend(). This can be used to mark DAPM endpoints as not being sensitive to system suspend. When the system is being suspended paths between endpoints which are marked as ignoring suspend will be kept active. Both source and sink must be marked, and there must already be an active path between the two endpoints prior to suspend. When paths are active over suspend the bias management will hold the device bias in the ON state. This is used to avoid suspending the CODEC while it is still in use. Tested-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> |
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| atmel | ||
| au1x | ||
| blackfin | ||
| codecs | ||
| davinci | ||
| fsl | ||
| imx | ||
| omap | ||
| pxa | ||
| s3c24xx | ||
| s6000 | ||
| sh | ||
| txx9 | ||
| Kconfig | ||
| Makefile | ||
| soc-cache.c | ||
| soc-core.c | ||
| soc-dapm.c | ||
| soc-jack.c | ||
| soc-utils.c | ||