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2e43aae2bf
linux/sound/usb
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Takashi Iwai 2e43aae2bf ALSA: usb-audio: Check implicit feedback EP generically for UAC2 
It seems that many UAC2 devices are with the implicit feedback, but
they couldn't be probed properly because the assumption the driver
takes currently isn't applied: they have the single endpoint for both
data and implicit-fb streams, while we checked only the classical sync
endpoints assigned to the next altsetting in the same interface.

This patch extends the search to match with those typical cases where
the implicit fb stream is found in the next interface number.

While we're at it, slightly refactor the code, not returning 0/-ERROR
but use the standard bool to success/failur, which is more intuitive
in this particular case.

Reported-by: Dylan Robinson <dylan_robinson@motu.com>
Tested-by: Keith Milner <kamilner@superlative.org>
Tested-by: Dylan Robinson <dylan_robinson@motu.com>
Link: https://lore.kernel.org/r/20201123085347.19667-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-11-23 15:11:46 +01:00
..
6fire sound: 6fire: move to use usb_control_msg_send() and usb_control_msg_recv() 2020-09-25 16:33:59 +02:00
bcd2000 ALSA: bcd2000: More constifications 2020-01-05 16:14:49 +01:00
caiaq ALSA: Replace with fallthrough pseudo keyword in the remaining places 2020-07-09 19:10:43 +02:00
hiface sound: hiface: move to use usb_control_msg_send() 2020-09-25 16:33:59 +02:00
line6 sound: line6: move to use usb_control_msg_send() and usb_control_msg_recv() 2020-09-25 16:33:59 +02:00
misc ALSA: ua101: Replace tasklet with work 2020-09-09 18:33:15 +02:00
usx2y sound: usx2y: move to use usb_control_msg_send() 2020-09-25 16:33:59 +02:00
card.c ALSA: usb-audio: Use ALC1220-VB-DT mapping for ASUS ROG Strix TRX40 mobo 2020-11-16 09:45:26 +01:00
card.h ALSA: usb-audio: Handle discrete rates properly in hw constraints 2020-11-23 15:11:02 +01:00
clock.c ALSA: usb-audio: Check valid altsetting at parsing rates for UAC2/3 2020-11-23 15:11:33 +01:00
clock.h ALSA: usb-audio: Check valid altsetting at parsing rates for UAC2/3 2020-11-23 15:11:33 +01:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
endpoint.c ALSA: usb-audio: endpoint.c: fix repeated word 'there' 2020-10-06 18:09:14 +02:00
endpoint.h ALSA: usb-audio: Improve frames size computation 2020-04-24 08:25:24 +02:00
format.c ALSA: usb-audio: Check valid altsetting at parsing rates for UAC2/3 2020-11-23 15:11:33 +01:00
format.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
helper.c USB: move snd_usb_pipe_sanity_check into the USB core 2020-09-16 11:02:23 +02:00
helper.h USB: move snd_usb_pipe_sanity_check into the USB core 2020-09-16 11:02:23 +02:00
Kconfig sound: Fix Kconfig indentation 2019-10-07 03:53:03 +02:00
Makefile ALSA: usb-audio: Add support for Presonus Studio 1810c 2020-02-15 09:46:16 +01:00
media.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
media.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
midi.c ALSA: usb-audio: Replace tasklet with work 2020-09-09 18:33:03 +02:00
midi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer_maps.c ALSA: usb-audio: Use ALC1220-VB-DT mapping for ASUS ROG Strix TRX40 mobo 2020-11-16 09:45:26 +01:00
mixer_quirks.c ALSA: usb-audio: Add mixer support for Pioneer DJ DJM-250MK2 2020-09-23 14:40:52 +02:00
mixer_quirks.h ALSA: usb-audio: Initialize Dell Dock playback volumes 2018-05-02 16:02:32 +02:00
mixer_s1810c.c ALSA: usb-audio: Fix some typos 2020-06-30 19:48:18 +02:00
mixer_s1810c.h ALSA: usb-audio: Add support for Presonus Studio 1810c 2020-02-15 09:46:16 +01:00
mixer_scarlett_gen2.c sound updates for 5.10 2020-10-15 11:07:44 -07:00
mixer_scarlett_gen2.h ALSA: usb-audio: Scarlett Gen 2 mixer interface 2019-07-28 17:47:48 +02:00
mixer_scarlett.c ALSA: usb-audio: More constifications 2020-01-05 16:14:34 +01:00
mixer_scarlett.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer_us16x08.c ALSA: usb-audio: fix spelling mistake "Frequence" -> "Frequency" 2020-10-02 11:24:51 +02:00
mixer_us16x08.h ALSA: usb: Constify snd_kcontrol_new items 2020-01-03 09:24:34 +01:00
mixer.c ALSA: usb-audio: ignore broken processing/extension unit 2020-08-17 19:58:29 +02:00
mixer.h ALSA: usb-audio: Fix OOB access of mixer element list 2020-06-24 14:24:29 +02:00
pcm.c ALSA: usb-audio: Check implicit feedback EP generically for UAC2 2020-11-23 15:11:46 +01:00
pcm.h ALSA: usb-audio: Add UAC3 Power Domains to suspend/resume 2018-07-31 15:01:36 +02:00
power.c ALSA: usb-audio: More validations of descriptor units 2019-08-22 10:35:59 +02:00
power.h ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
proc.c ALSA: usb-audio: Fix a limit check in proc_dump_substream_formats() 2020-04-22 11:29:15 +02:00
proc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quirks-table.h Merge branch 'for-linus' into for-next 2020-09-09 18:26:48 +02:00
quirks.c ALSA: usb-audio: Add delay quirk for all Logitech USB devices 2020-11-17 13:47:09 +01:00
quirks.h ALSA: usb-audio: Rewrite registration quirk handling 2020-03-26 10:47:00 +01:00
stream.c ALSA: usb-audio: Handle discrete rates properly in hw constraints 2020-11-23 15:11:02 +01:00
stream.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usbaudio.h Merge branch 'for-linus' into for-next 2020-08-23 13:20:34 +02:00
validate.c ALSA: usb-audio: Fix endianess in descriptor validation 2020-02-01 09:06:11 +01:00