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linux-next/sound/core
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Takashi Sakamoto 47271b1b98 ALSA: pcm: add snd_pcm_period_elapsed() variant without acquiring lock of PCM substream 
Current implementation of ALSA PCM core has a kernel API,
snd_pcm_period_elapsed(), for drivers to queue event to awaken processes
from waiting for available frames. The function voluntarily acquires lock
of PCM substream, therefore it is not called in process context for any
PCM operation since the lock is already acquired.

It is convenient for packet-oriented driver, at least for drivers to audio
and music unit in IEEE 1394 bus. The drivers are allowed by Linux
FireWire subsystem to process isochronous packets queued till recent
isochronous cycle in process context in any time.

This commit adds snd_pcm_period_elapsed() variant,
snd_pcm_period_elapsed_without_lock(), for drivers to queue the event in
the process context.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210610031733.56297-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-06-10 09:49:54 +02:00
..
oss ALSA: oss: Fix assignment in if condition 2021-06-09 17:30:25 +02:00
seq ALSA: seq: Fix assignment in if condition 2021-06-09 17:30:26 +02:00
compress_offload.c ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
control_compat.c ALSA: control: Drop superfluous snd_power_wait() calls 2021-05-25 08:48:49 +02:00
control_led.c Merge branch 'for-linus' into for-next 2021-06-08 14:02:06 +02:00
control.c ALSA: control: Minor optimization for SNDRV_CTL_IOCTL_POWER_STATE 2021-05-25 08:49:06 +02:00
ctljack.c ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
device.c ALSA: core: Add snd_device_get_state() helper 2020-03-23 18:09:19 +01:00
hrtimer.c ALSA: timer: Replace tasklet with work 2020-09-09 18:32:52 +02:00
hwdep_compat.c ALSA: compat_ioctl: avoid compat_alloc_user_space 2020-09-21 10:37:07 +02:00
hwdep.c ALSA: core: Fix assignment in if condition 2021-06-09 17:30:22 +02:00
info_oss.c ALSA: core: Fix assignment in if condition 2021-06-09 17:30:22 +02:00
info.c ALSA: info: Drop WARN_ON() from buffer NULL sanity check 2020-07-17 10:59:38 +02:00
init.c ALSA: core: Fix assignment in if condition 2021-06-09 17:30:22 +02:00
isadma.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
jack.c ALSA: jack: implement software jack injection via debugfs 2021-02-02 10:37:07 +01:00
Kconfig ALSA: control - add generic LED trigger module as the new control layer 2021-03-30 15:33:58 +02:00
Makefile ALSA: control - add generic LED trigger module as the new control layer 2021-03-30 15:33:58 +02:00
memalloc.c ALSA: memalloc: Align buffer allocations in page size 2020-12-18 17:09:10 +01:00
memory.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
misc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pcm_compat.c ALSA: pcm: Fix assignment in if condition 2021-06-09 17:30:24 +02:00
pcm_dmaengine.c ASoC: dmaengine_pcm: add peripheral configuration 2021-02-05 17:16:41 +00:00
pcm_drm_eld.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pcm_iec958.c ALSA: core: pcm_iec958: fix kernel-doc 2020-07-07 10:22:33 +02:00
pcm_lib.c ALSA: pcm: add snd_pcm_period_elapsed() variant without acquiring lock of PCM substream 2021-06-10 09:49:54 +02:00
pcm_local.h ALSA: pcm: Use for_each_pcm_substream() macro 2021-02-08 16:01:01 +01:00
pcm_memory.c ALSA: core: avoid -Wempty-body warnings 2021-03-22 12:26:00 +01:00
pcm_misc.c ALSA: pcm: Fix assignment in if condition 2021-06-09 17:30:24 +02:00
pcm_native.c ALSA: pcm: Fix assignment in if condition 2021-06-09 17:30:24 +02:00
pcm_param_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcm_timer.c ALSA: timer: Constify snd_timer_hardware definitions 2020-01-03 09:24:07 +01:00
pcm_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcm.c ALSA: pcm: use DEVICE_ATTR_RO macro 2021-05-25 09:00:04 +02:00
rawmidi_compat.c ALSA: rawmidi: Add framing mode 2021-05-17 16:02:44 +02:00
rawmidi.c ALSA: rawmidi: fix incorrect array bounds check on clock_names 2021-05-19 16:20:25 +02:00
seq_device.c ALSA: core: avoid -Wempty-body warnings 2021-03-22 12:26:00 +01:00
sgbuf.c ALSA: memalloc: Make SG-buffer helper usable for continuous buffer, too 2020-06-15 18:01:52 +02:00
sound_oss.c ALSA: core: Fix assignment in if condition 2021-06-09 17:30:22 +02:00
sound.c ALSA: core: Fix assignment in if condition 2021-06-09 17:30:22 +02:00
timer_compat.c ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
timer.c ALSA: timer: Fix master timer notification 2021-06-03 09:39:58 +02:00
vmaster.c ALSA: Replace the word "slave" in vmaster API 2020-07-20 10:10:47 +02:00