Clemens Ladisch ab69a4904b ALSA: pcm: support for period wakeup disabling ... This patch allows to disable period interrupts which are not needed when the application relies on a system timer to wake-up and refill the ring buffer. The behavior of the driver is left unchanged, and interrupts are only disabled if the application requests this configuration. The behavior in case of underruns is slightly different, instead of being detected during the period interrupts the underruns are detected when the application calls snd_pcm_update_avail, which in turns forces a refresh of the hw pointer and shows the buffer is empty. More specifically this patch makes a lot of sense when PulseAudio relies on timer-based scheduling to access audio devices such as HDAudio or Intel SST. Disabling interrupts removes two unwanted wake-ups due to period elapsed events in low-power playback modes. It also simplifies PulseAudio voice modules used for speech calls. To quote Lennart "This patch looks very interesting and desirable. This is something have long been waiting for." Support for this in hardware drivers is optional. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>		2010-11-22 08:13:16 +01:00
..
ac97_codec.h	comment typo fix: sybsystem -> subsystem	2009-12-04 15:39:49 +01:00
aci.h	ALSA: opti-miro: expose ACI mixer to outside drivers	2009-11-23 09:41:55 +01:00
ad1816a.h	ALSA: ad1816a: enable hardware timer	2009-01-21 15:12:40 +01:00
ad1843.h	ALSA: ALSA driver for SGI O2 audio board	2008-07-14 09:01:02 +02:00
ak4xxx-adda.h	ALSA: ak4620 support, codec regs listed in proc	2009-09-21 15:44:51 +02:00
ak4113.h	ALSA: i2c: cleanup: change parameter to pointer	2010-04-04 12:21:39 +02:00
ak4114.h	ALSA: ak4114 - fix errors in output selector bits	2009-09-21 15:44:39 +02:00
ak4117.h
ak4531_codec.h
asequencer.h	[ALSA] Remove sequencer instrument layer	2008-01-31 17:29:13 +01:00
asound.h	ALSA: pcm: support for period wakeup disabling	2010-11-22 08:13:16 +01:00
asound_fm.h
asoundef.h	ALSA: IEC958 definition for consumer status channel update	2008-08-01 13:13:13 +02:00
atmel-abdac.h	ALSA: Add ALSA driver for Atmel Audio Bitstream DAC	2009-02-05 15:08:48 +01:00
atmel-ac97c.h	ALSA: Add ALSA driver for Atmel AC97 controller	2009-02-05 15:08:51 +01:00
control.h	control: use reference-counted pid	2009-11-06 14:32:06 +01:00
core.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6	2010-10-25 08:32:05 -07:00
cs46xx.h	[ALSA] sound: remove dead config symbol from sound code	2008-01-31 17:29:21 +01:00
cs46xx_dsp_scb_types.h
cs46xx_dsp_spos.h	ALSA: cs46xx - Fix suspend/resume with new DSP	2009-12-22 09:00:14 +01:00
cs46xx_dsp_task_types.h
cs4231-regs.h	ALSA: cs4236: update control names	2009-11-18 07:23:16 +01:00
cs8403.h
cs8427.h
emu10k1.h	ALSA: emu10k1: Fix warning: "CCR" redefined	2010-10-18 07:45:44 +02:00
emu10k1_synth.h
emu8000.h
emu8000_reg.h
emux_legacy.h
emux_synth.h
es1688.h	ALSA: Merge es1688 and es968 drivers	2010-05-10 09:49:30 +02:00
gus.h	[ALSA] Remove sequencer instrument layer	2008-01-31 17:29:13 +01:00
hda_hwdep.h
hdsp.h	headers_check fix: sound/hdsp.h	2009-01-31 00:13:56 +05:30
hdspm.h
hwdep.h	ALSA: hwdep - Fix coding style	2009-02-05 09:17:50 +01:00
i2c.h
info.h	ALSA: info - Use standard types for info callbacks	2010-04-13 11:57:14 +02:00
initval.h
jack.h	ALSA: Add more jack button slots	2010-09-07 08:04:38 +02:00
Kbuild	include: replace unifdef-y with header-y	2010-08-14 22:26:51 +02:00
l3.h	ASoC: UDA134x codec driver	2008-11-17 11:45:39 +00:00
max98088.h	ASoC: Restore MAX98088 CODEC driver	2010-10-18 16:46:27 -07:00
memalloc.h	ALSA: Fix SG-buffer DMA with non-coherent architectures	2009-07-08 14:20:20 +02:00
minors.h	ALSA: Fix limit of 8 PCM devices in SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE	2008-08-01 13:37:15 +02:00
mixer_oss.h
mpu401.h	[ALSA] Add MPU401_INFO_NO_ACK bitflag	2008-04-29 19:01:56 +02:00
opl3.h	[ALSA] opl3 - Fix compilation without sequencer support	2008-02-22 14:20:08 -08:00
opl4.h
pcm-indirect.h
pcm.h	ALSA: pcm: support for period wakeup disabling	2010-11-22 08:13:16 +01:00
pcm_oss.h	ALSA: pcm_lib - cleanup & merge hw_ptr update functions	2010-01-07 15:47:38 +01:00
pcm_params.h
pt2258.h
pxa2xx-lib.h	[ARM] pxa: merge AC97 platform data structures	2009-04-15 10:54:06 +08:00
rawmidi.h	sound: rawmidi: record a substream's owner process	2009-11-10 16:32:38 +01:00
s3c24xx_uda134x.h	ASoC: Machine driver for for s3c24xx with uda134x	2008-11-17 11:45:53 +00:00
sb.h	ALSA: jazz16: Add support for Media Vision Jazz16 chipset	2009-12-21 12:09:22 +01:00
sb16_csp.h
seq_device.h
seq_kernel.h	ALSA: remove CONFIG_KMOD from sound	2008-07-10 09:32:58 +02:00
seq_midi_emul.h
seq_midi_event.h
seq_oss.h
seq_oss_legacy.h
seq_virmidi.h
sfnt_info.h	ALSA: Use define for ioctl definitions	2009-03-11 09:55:03 +01:00
sh_dac_audio.h	ALSA: sh: add SuperH DAC audio driver for ALSA V4	2009-11-04 09:17:40 +01:00
sh_fsi.h	ASoC: fsi: modify compile error	2010-08-31 13:28:13 +01:00
snd_wavefront.h	ALSA: wss_lib: rename cs4231.h into wss.h	2008-08-06 15:39:47 +02:00
soc-dai.h	ASoC: multi-component - ASoC Multi-Component Support	2010-08-12 14:00:00 +01:00
soc-dapm.h	ASoC: Add event variants of the AIF widgets	2010-09-06 11:34:29 +01:00
soc.h	ASoC: don't register AC97 devices twice	2010-10-13 10:35:17 +01:00
soundfont.h
tea575x-tuner.h	V4L/DVB (10771): tea575x-tuner: convert it to V4L2 API	2009-03-30 12:43:02 -03:00
tea6330t.h
timer.h
tlv.h	ALSA: tlv - Define numbers in sound/tlv.h	2010-10-17 10:46:14 +02:00
tlv320aic3x.h	ASoC: multi-component - ASoC Multi-Component Support	2010-08-12 14:00:00 +01:00
tlv320dac33-plat.h	ASoC: tlv320dac33: Add support for automatic FIFO configuration	2010-07-29 10:21:11 +01:00
tpa6130a2-plat.h	Revert "ASoC: tpa6130a2: Support for limiting gain"	2010-05-07 16:42:23 +01:00
trident.h	[ALSA] Remove sequencer instrument layer	2008-01-31 17:29:13 +01:00
uda134x.h	ASoC: uda134x: replace a macro with a value in platform struct.	2010-06-25 12:29:01 +01:00
uda1380.h	ASoC: UDA1380: refactor device registration	2009-06-15 21:54:48 +01:00
util_mem.h
version.h	ALSA: Release v1.0.23	2010-04-16 13:12:36 +02:00
vx_core.h	ALSA: Kill snd_assert() in other places	2008-08-13 11:46:40 +02:00
wavefront.h
wm2000.h	ASoC: Add WM2000 driver	2010-02-12 10:31:06 +00:00
wm8903.h	ASoC: Implement interrupt driven microphone detection for WM8903	2010-03-16 15:57:43 +00:00
wm8904.h	ASoC: Support GPIO based microphone detection for WM8904	2010-03-16 16:03:30 +00:00
wm8955.h	ASoC: Add initial WM8955 CODEC driver	2009-12-18 13:06:47 +00:00
wm8960.h	ASoC: Add support for WM8960 capless mode	2010-03-03 17:08:43 +00:00
wm8962.h	ASoC: Add support for WM8962 GPIO outputs	2010-10-02 14:23:04 -07:00
wm8993.h	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
wm9081.h	ASoC: WM9081 mono DAC with integrated 2.6W class AB/D amplifier driver	2009-05-22 15:11:22 +01:00
wm9090.h	ASoC: Add WM9090 amplifier driver	2010-04-30 16:12:44 +01:00
wss.h	ALSA: cs4236: detect chip in one pass	2009-11-05 18:10:25 +01:00
ymfpci.h	sound: ymfpci: increase timer resolution to 96 kHz	2009-08-10 13:14:46 +02:00