The following patch series implements support for keeping some paths in the audio codec enabled while the system is suspended. This is primarily intended for mobile phones, where the GSM modem is normally capable of supporting a voice call with no intervention from the CPU so power can be saved by suspending the Linux system. This is done by allowing DAPM nodes to be marked as ignoring suspend. Any audio paths between two widgets set up like this at suspend time will be kept active and the CODEC device will not be suspended.
The existing testing is very light (especially for digital paths), the intention is to do more of that get this merged into Takashi's tree early next week.
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound-2.6.git suspend-enable
Mark Brown (5): ASoC: Remove unneeded suspend bias managment from CODEC drivers ASoC: Remove unused DAPM suspend flag ASoC: Refactor DAPM suspend handling ASoC: Support leaving paths enabled over system suspend ASoC: Allow active paths from the GSM modem while the GTA02 is suspended
include/sound/soc-dapm.h | 3 +- sound/soc/codecs/ak4535.c | 1 - sound/soc/codecs/cq93vc.c | 2 +- sound/soc/codecs/ssm2602.c | 1 - sound/soc/codecs/stac9766.c | 3 - sound/soc/codecs/tlv320aic23.c | 1 - sound/soc/codecs/tlv320aic3x.c | 2 +- sound/soc/codecs/tlv320dac33.c | 3 - sound/soc/codecs/twl4030.c | 1 - sound/soc/codecs/twl6040.c | 1 - sound/soc/codecs/uda1380.c | 1 - sound/soc/codecs/wm8350.c | 3 - sound/soc/codecs/wm8510.c | 2 +- sound/soc/codecs/wm8711.c | 2 +- sound/soc/codecs/wm8728.c | 2 +- sound/soc/codecs/wm8731.c | 1 - sound/soc/codecs/wm8903.c | 1 - sound/soc/codecs/wm8940.c | 1 - sound/soc/codecs/wm8960.c | 2 +- sound/soc/codecs/wm8974.c | 2 +- sound/soc/codecs/wm9712.c | 3 - sound/soc/codecs/wm9713.c | 3 - sound/soc/s3c24xx/neo1973_gta02_wm8753.c | 8 +++ sound/soc/soc-core.c | 35 ++++++++++- sound/soc/soc-dapm.c | 92 +++++++++++++++++++----------- 25 files changed, 107 insertions(+), 69 deletions(-)