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ea9d0d771f
linux/include/sound
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Takashi Iwai ea9d0d771f ASoC: dpcm: Fix race between FE/BE updates and trigger 
DPCM can update the FE/BE connection states totally asynchronously
from the FE's PCM state.  Most of FE/BE state changes are protected by
mutex, so that they won't race, but there are still some actions that
are uncovered.  For example, suppose to switch a BE while a FE's
stream is running.  This would call soc_dpcm_runtime_update(), which
sets FE's runtime_update flag, then sets up and starts BEs, and clears
FE's runtime_update flag again.

When a device emits XRUN during this operation, the PCM core triggers
snd_pcm_stop(XRUN).  Since the trigger action is an atomic ops, this
isn't blocked by the mutex, thus it kicks off DPCM's trigger action.
It eventually updates and clears FE's runtime_update flag while
soc_dpcm_runtime_update() is running concurrently, and it results in
confusion.

Usually, for avoiding such a race, we take a lock.  There is a PCM
stream lock for that purpose.  However, as already mentioned, the
trigger action is atomic, and we can't take the lock for the whole
soc_dpcm_runtime_update() or other operations that include the lengthy
jobs like hw_params or prepare.

This patch provides an alternative solution.  This adds a way to defer
the conflicting trigger callback to be executed at the end of FE/BE
state changes.  For doing it, two things are introduced:

- Each runtime_update state change of FEs is protected via PCM stream
  lock.
- The FE's trigger callback checks the runtime_update flag.  If it's
  not set, the trigger action is executed there.  If set, mark the
  pending trigger action and returns immediately.
- At the exit of runtime_update state change, it checks whether the
  pending trigger is present.  If yes, it executes the trigger action
  at this point.

Reported-and-tested-by: Qiao Zhou <zhouqiao@marvell.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-04 17:18:32 +00:00
..
ac97_codec.h Sound updates for 3.7-rc1 2012-10-09 07:07:14 +09:00
aci.h
ad1816a.h Sound updates for 3.7-rc1 2012-10-09 07:07:14 +09:00
ad1843.h
adau1373.h ASoC: Add ADAU1373 codec support 2011-08-17 00:53:54 +09:00
aess.h ASoC: TI AESS: add autogating-enable function, callable from architecture code 2013-02-10 11:22:23 -07:00
ak4xxx-adda.h
ak4113.h
ak4114.h ALSA: ak4114: Fix wrong register array size 2013-10-29 16:42:36 +01:00
ak4117.h
ak4531_codec.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
ak4641.h ASoC: Asahi Kasei AK4641 codec driver 2011-05-19 14:10:45 -07:00
alc5623.h ASoC: add support for alc562[123] codecs 2010-10-21 13:51:13 -07:00
asequencer.h UAPI: (Scripted) Disintegrate include/sound 2012-10-09 09:49:13 +01:00
asound.h UAPI: (Scripted) Disintegrate include/sound 2012-10-09 09:49:13 +01:00
asoundef.h ALSA: Add definitions for CEA-861 Audio InfoFrames 2012-04-18 08:00:36 +02:00
atmel-abdac.h dmaengine: dw: move dw_dmac.h to where it belongs to 2014-09-11 11:48:12 +05:30
atmel-ac97c.h dmaengine: dw: move dw_dmac.h to where it belongs to 2014-09-11 11:48:12 +05:30
compress_driver.h ALSA: compress: fix drain calls blocking other compress functions (v6) 2013-11-07 10:12:27 +01:00
control.h ALSA: control: Define SNDRV_CTL_TLV_OP_* constants 2014-07-15 16:31:01 +02:00
core.h ALSA: control: Protect user controls against concurrent access 2014-06-18 15:12:33 +02:00
cs42l52.h ASoC: cs42l52: Make MICA/B mixer dependent on mic config 2013-11-28 10:20:51 +00:00
cs42l56.h ASoC: Add support for CS42L56 CODEC 2014-05-05 18:20:22 -07:00
cs42l73.h ASoC: cs42l73: Add platform data support for cs42l73 codec 2013-10-18 00:37:29 +01:00
cs4231-regs.h
cs4271.h ALSA: ASoC: cs4271: add optional soft reset workaround 2012-12-24 15:53:28 +00:00
cs8403.h
cs8427.h ALSA: cs8427: separate HW initialization 2014-04-03 14:59:48 +02:00
da7213.h ASoC: codecs: Add da7213 codec 2013-02-14 17:27:17 +00:00
da9055.h ASoC: codecs: Add DA9055 codec driver 2012-09-28 14:21:54 +01:00
designware_i2s.h ASoC: Add support for synopsys i2s controller as per ASoC framework. 2012-06-22 10:25:45 +01:00
dmaengine_pcm.h ASoC: dmaengine: add custom DMA config to snd_dmaengine_pcm_config 2013-12-09 18:45:01 +00:00
emu10k1_synth.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
emu10k1.h Revert "ALSA: emu10k1: Fix warning: "CCR" redefined" 2014-03-11 07:54:14 +01:00
emu8000_reg.h
emu8000.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
emux_legacy.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
emux_synth.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
es1688.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
gus.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
hda_hwdep.h
hda_verbs.h ALSA: hda - Split verb definitions into sound/hda_verbs.h 2013-12-09 17:31:40 +01:00
hwdep.h ALSA: hwdep: Allow to assign the given parent 2014-02-25 12:12:50 +01:00
i2c.h
info.h switch procfs to umode_t use 2012-01-03 22:54:56 -05:00
initval.h ALSA: isa: Move snd_legacy_find_free_ioport to initval.h 2012-08-03 12:57:44 +02:00
jack.h ALSA: Use a define for the number of jack switch types 2012-02-27 17:34:44 +01:00
l3.h
max9768.h ASoC: max9768: add driver for max9768 amplifier 2012-01-30 21:50:55 +00:00
max98088.h ASoC: Restore MAX98088 CODEC driver 2010-10-18 16:46:27 -07:00
max98090.h ASoC:: max98090: Remove executable bit 2013-03-20 10:54:12 +01:00
max98095.h ASoC: max98095: Single bit bitfields should be unsigned 2012-05-13 23:33:53 +01:00
memalloc.h ALSA: Remove memory reservation code from memalloc helper 2014-01-09 07:32:10 +01:00
minors.h ALSA: core: add support for compressed devices 2011-12-23 10:07:46 +01:00
mixer_oss.h ALSA: core: sparse cleanups 2011-02-14 17:10:11 +01:00
mpu401.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
omap-pcm.h ASoC: omap-pcm: Move omap-pcm under include/sound 2014-05-26 15:32:32 +01:00
opl3.h
opl4.h
pcm_oss.h
pcm_params.h ALSA: Add params_width() helpers 2013-12-30 12:19:26 +00:00
pcm-indirect.h
pcm.h ALSA: pcm: add new DSD sampleformat for native DSD playback on XMOS based devices 2014-09-08 17:11:00 +02:00
pt2258.h
pxa2xx-lib.h ASoC: pxa: use snd_dmaengine_dai_dma_data 2013-08-15 11:29:07 +01:00
rawmidi.h ALSA: rawmidi: remove undefined functions. 2014-02-21 12:06:12 +01:00
rcar_snd.h ASoC: rsnd: SSI + DMA can select BUSIF 2014-06-28 14:41:19 +01:00
rt286.h ASoC: add RT286 CODEC driver 2014-07-04 18:50:51 +01:00
rt5640.h ASoC: rt5640: Use the platform data for DMIC settings 2014-04-14 17:27:41 +01:00
rt5645.h ASoC: rt5645: Add headset detect function 2014-10-01 19:28:44 +01:00
rt5651.h ASoC: add RT5651 CODEC driver 2014-04-18 18:52:18 +01:00
rt5670.h ASoC: add RT5670 CODEC driver 2014-07-02 20:49:25 +01:00
rt5677.h ASoC: rt5677: Add dts properties for input/output differential configuration 2014-09-29 19:46:20 +01:00
s3c24xx_uda134x.h
sb16_csp.h UAPI: (Scripted) Disintegrate include/sound 2012-10-09 09:49:13 +01:00
sb.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
seq_device.h
seq_kernel.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
seq_midi_emul.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
seq_midi_event.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
seq_oss_legacy.h
seq_oss.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
seq_virmidi.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
sh_dac_audio.h
sh_fsi.h ASoC: fsi: cleanup sh_fsi.h 2012-12-24 15:57:20 +00:00
simple_card.h ASoC: simple-card: add slot information parsing supports 2014-02-23 14:26:37 +09:00
snd_wavefront.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
soc-dai.h ASoC: core: Add initial support for DAI multicodec 2014-07-16 22:58:49 +01:00
soc-dapm.h Merge remote-tracking branches 'asoc/topic/davinci', 'asoc/topic/dmic', 'asoc/topic/drivers', 'asoc/topic/es8328' and 'asoc/topic/fsl' into asoc-next 2014-10-06 12:48:57 +01:00
soc-dpcm.h ASoC: dpcm: Fix race between FE/BE updates and trigger 2014-11-04 17:18:32 +00:00
soc.h Merge remote-tracking branches 'asoc/topic/davinci', 'asoc/topic/dmic', 'asoc/topic/drivers', 'asoc/topic/es8328' and 'asoc/topic/fsl' into asoc-next 2014-10-06 12:48:57 +01:00
soundfont.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
spear_dma.h ASoC: SPEAr: remove custom DMA alloc compat function 2013-12-18 18:55:06 +00:00
spear_spdif.h ASoC: SPEAr spdif_in: Add spdif IN support 2012-06-23 11:58:10 +01:00
sta32x.h ASoC: sta32x: add workaround for ESD reset issue 2011-11-14 21:36:43 +00:00
sta350.h ASoC: sta350: add support for bits in miscellaneous registers 2014-05-05 12:52:59 -07:00
tas2552-plat.h ASoC: tas2552: Support TI TAS2552 Amplifier 2014-07-17 17:57:05 +01:00
tas5086.h ALSA: ASoC: add codec driver for TI TAS5086 2013-03-08 21:06:09 +08:00
tea6330t.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
timer.h
tlv320aic3x.h ASoC: tlv320aic3x: Convert mic bias to a supply widget 2013-02-04 18:35:19 +00:00
tlv320aic32x4.h ASoC: tlv320aic32x4: Add rstn gpio to platform data. 2012-11-01 14:35:56 +00:00
tlv320dac33-plat.h ASoC: tlv320dac33: Update e-mail address 2011-05-11 16:12:35 +01:00
tlv.h ALSA: Add comment for control TLV API 2013-05-08 15:43:56 +02:00
tpa6130a2-plat.h ASoC: tpa6130a2: Remove model_id from platform data 2011-09-21 16:07:45 +01:00
uda134x.h
uda1380.h
util_mem.h
vx_core.h ALSA: vx: Use nonatomic PCM ops 2014-09-15 15:52:03 +02:00
wavefront.h
wm0010.h ASoC: wm0010: Add initial wm0010 DSP driver 2012-08-23 16:12:12 +01:00
wm1250-ev1.h ASoC: Add platform data for WM1250 EV1 GPIOs 2011-09-23 17:05:38 +01:00
wm2000.h ASoC: wm2000: Use clock API integration to configure MCLK divisor 2012-12-24 15:42:35 +00:00
wm2200.h ASoC: wm2200: Provide platform data for MICBIAS configuration 2013-02-05 15:53:07 +00:00
wm5100.h ASoC: Add WM5100 driver 2011-09-20 16:02:16 +01:00
wm8903.h ASoC: WM8903: Fix platform data gpio_cfg confusion 2011-12-06 10:29:22 +00:00
wm8904.h
wm8955.h
wm8960.h ASoC: wm8960: remove 'dres' field from platform data structure 2012-09-21 08:35:06 -04:00
wm8962.h ASoC: wm8962: Let CODEC driver enable and disable its own MCLK 2014-07-31 20:51:26 +01:00
wm8993.h ASoC: wm_hubs: Allow configuration of MICBIAS power up delay via pdata 2012-08-22 19:00:37 +01:00
wm8996.h ASoC: Rename WM8915 to WM8996 2011-08-08 14:30:37 +09:00
wm9081.h ASoC: Add platform data for WM9081 IRQ pin configuration 2011-03-01 23:30:53 +00:00
wm9090.h
wss.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00