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1e2e3fe480
linux/sound/usb
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Daniel Girnus 1e2e3fe480 ALSA: usb-audio: avoid setting of sample rate multiple times on bus 
Some of userland applications call 'snd_pcm_hw_params()' and
'snd_pcm_hw_prepare()' sequentially, which means 'snd_pcm_hw_prepare()'
is called twice and the second 'snd_pcm_hw_prepare()' is called in
'SNDRV_PCM_STATE_PREPARED' state.

Some devices are not able to manage this and they will stop playback
if the sample rate will be configured several times over USB protocol.

V2: updated Changelog

Signed-off-by: Daniel Girnus <dgirnus@de.adit-jv.com>
Signed-off-by: Jens Lorenz <jlorenz@de.adit-jv.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-12-06 13:55:15 +01:00
..
6fire treewide: Fix typos in printk 2015-12-08 14:59:19 +01:00
bcd2000 ALSA: bcd2000: Make local data static 2015-05-26 13:00:01 +02:00
caiaq ALSA: usb: caiaq: audio: don't print error when allocating urb fails 2016-08-11 23:05:57 +02:00
hiface ALSA: usb: Convert to snd_card_new() with a device pointer 2014-02-12 11:18:00 +01:00
line6 ALSA: line6: Claim pod x3 usb data interface 2016-11-29 22:16:14 +01:00
misc ALSA: ua101: replace le16_to_cpu() with usb_endpoint_maxp() 2015-11-16 09:03:06 +01:00
usx2y ALSA: usx2y: fix inconsistent indenting on if statement 2015-12-02 18:03:24 +01:00
card.c ALSA: usb-audio: Fix bogus error return in snd_usb_create_stream() 2016-11-29 22:28:40 +01:00
card.h ALSA: usb: use TEAC UD-H01 quirk for more devices 2016-08-22 11:39:56 +02:00
clock.c ALSA: usb-audio: Limit retrying sample rate reads 2016-04-29 11:49:04 +02:00
clock.h ALSA: usb-audio: UAC2: do clock validity check earlier 2013-04-04 08:30:59 +02:00
debug.h ALSA: usb-audio: make hwc_debug a noop in case HW_CONST_DEBUG is not set 2011-05-18 11:44:35 +02:00
endpoint.c ALSA: usb: fine-tune Tenor error compensation value 2016-08-22 11:40:04 +02:00
endpoint.h ALSA: usb-audio: Pass direct struct pointer instead of list_head 2014-11-04 15:09:10 +01:00
format.c ALSA: usb-audio: rmove print for failure of kmalloc 2016-08-22 11:41:02 +02:00
format.h ALSA: usb-audio: store protocol version in struct audioformat 2013-06-27 21:59:47 +02:00
helper.c ALSA: usb-audio: correct speed checking 2016-05-08 11:42:04 +02:00
helper.h ALSA: usb-audio: increase control transfer timeout 2011-09-27 09:21:48 +02:00
Kconfig [media] Revert "[media] sound/usb: Use Media Controller API to share media resources" 2016-03-31 15:02:33 -03:00
Makefile [media] Revert "[media] sound/usb: Use Media Controller API to share media resources" 2016-03-31 15:02:33 -03:00
midi.c ALSA: usb-midi: correct speed checking 2016-05-08 11:42:30 +02:00
midi.h ALSA: usb-audio: Refer to chip->usb_id for quirks and MIDI creation 2016-01-29 07:36:10 +01:00
mixer_maps.c ALSA: usb-audio: Change structure initialisation to C99 style 2016-06-17 16:58:41 +02:00
mixer_quirks.c ALSA: usb-audio: Extend DragonFly dB scale quirk to cover other variants 2016-09-23 08:32:18 +02:00
mixer_quirks.h ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly 2015-12-14 10:13:17 +01:00
mixer_scarlett.c ALSA: usb-audio: Fix Scarlett 6i6 initialization typo 2014-12-18 08:39:17 +01:00
mixer_scarlett.h ALSA: usb-audio: Scarlett mixer interface for 6i6, 18i6, 18i8 and 18i20 2014-11-13 07:32:39 +01:00
mixer.c ALSA: usb-audio: allow clock source validity interrupts 2016-04-09 17:22:40 +02:00
mixer.h [media] Revert "[media] sound/usb: Use Media Controller API to share media resources" 2016-03-31 15:02:33 -03:00
pcm.c ALSA: usb-audio: avoid setting of sample rate multiple times on bus 2016-12-06 13:55:15 +01:00
pcm.h ALSA: usb: refine delay information with USB frame counter 2011-09-12 10:30:20 +02:00
power.h ALSA: usbaudio: implement USB autosuspend 2011-03-11 14:59:29 +01:00
proc.c ALSA: usb-audio: Avoid nested autoresume calls 2015-08-26 15:38:25 +02:00
proc.h ALSA: usb-audio: refactor code 2010-03-05 08:17:14 +01:00
quirks-table.h ALSA: usb-audio: Add quirk for Syntek STK1160 2016-10-27 12:07:19 +02:00
quirks.c Merge branch 'for-linus' into for-next 2016-09-11 09:33:12 +02:00
quirks.h ALSA: usb-audio: Refer to chip->usb_id for quirks and MIDI creation 2016-01-29 07:36:10 +01:00
stream.c media fixes for v4.6-rc2 2016-04-05 06:47:50 -07:00
stream.h ALSA: snd-usb: re-order code 2011-09-14 17:07:02 +02:00
usbaudio.h Merge branch 'for-linus' into for-next 2016-05-10 16:06:04 +02:00