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21cba9c535
linux-next/sound/usb
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Takashi Iwai 21cba9c535 ALSA: usb-audio: Drop bogus dB range in too low level 
Some USB audio firmware seem to report broken dB values for the volume
controls, and this screws up applications like PulseAudio who blindly
trusts the given data.  For example, Edifier G2000 reports a PCM
volume from -128dB to -127dB, and this results in barely inaudible
sound.

This patch adds a sort of sanity check at parsing the dB values in
USB-audio driver and disables the dB reporting if the range looks
bogus.  Here, we assume -96dB as the bottom line of the max dB.

Note that, if one can figure out that proper dB range later, it can be
patched in the mixer maps.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=211929
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210227105737.3656-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-02-27 11:58:05 +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: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
caiaq ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
hiface ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
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 Merge branch 'for-linus' into for-next 2021-01-18 17:39:23 +01:00
card.h ALSA: usb-audio: More strict state change in EP 2021-02-08 16:00:06 +01:00
clock.c ALSA: usb-audio: Don't abort even if the clock rate differs 2021-02-27 09:26:05 +01:00
clock.h ALSA: usb-audio: Constify audioformat pointer references 2020-11-23 15:15:36 +01:00
endpoint.c ALSA: usb-audio: Don't avoid stopping the stream at disconnection 2021-02-08 16:00:16 +01:00
endpoint.h ALSA: usb-audio: Avoid unnecessary interface re-setup 2021-01-08 23:43:37 +01:00
format.c ALSA: usb-audio: workaround for iface reset issue 2021-01-23 16:59:42 +01:00
format.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
helper.c ALSA: usb-audio: Add snd_usb_get_host_interface() helper 2020-11-23 15:13:47 +01:00
helper.h ALSA: usb-audio: Add snd_usb_get_host_interface() helper 2020-11-23 15:13:47 +01:00
implicit.c ALSA: usb-audio: Add implicit fb quirk for BOSS GP-10 2021-02-14 16:43:40 +01:00
implicit.h ALSA: usb-audio: Factor out the implicit feedback quirk code 2020-11-23 15:17:00 +01:00
Kconfig sound: Fix Kconfig indentation 2019-10-07 03:53:03 +02:00
Makefile ALSA: usb-audio: Factor out the implicit feedback quirk code 2020-11-23 15:17:00 +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: Fix UBSAN warnings for MIDI jacks 2020-12-23 18:46:54 +01:00
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 quirks for Pioneer DJM-900NXS2 2021-02-05 23:18:40 +01:00
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 ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
mixer_scarlett_gen2.h ALSA: usb-audio: Scarlett Gen 2 mixer interface 2019-07-28 17:47:48 +02:00
mixer_scarlett.c ALSA: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +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: Convert strlcpy to strscpy when return value is unused 2021-01-08 09:30:05 +01:00
mixer_us16x08.h ALSA: usb: Constify snd_kcontrol_new items 2020-01-03 09:24:34 +01:00
mixer.c ALSA: usb-audio: Drop bogus dB range in too low level 2021-02-27 11:58:05 +01:00
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: Don't avoid stopping the stream at disconnection 2021-02-08 16:00:16 +01:00
pcm.h ALSA: usb-audio: Constify audioformat pointer references 2020-11-23 15:15:36 +01:00
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: Show sync endpoint information in proc outputs 2020-11-23 15:16:45 +01:00
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 ALSA: usb-audio: Add DJM-450 to the quirks table 2021-02-02 18:47:08 +01:00
quirks.c ALSA: usb-audio: Add DJM450 to Pioneer format quirk 2021-02-02 18:46:08 +01:00
quirks.h ALSA: usb-audio: Constify audioformat pointer references 2020-11-23 15:15:36 +01:00
stream.c Merge branch 'for-linus' into for-next 2020-12-14 09:05:29 +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 ALSA: usb-audio: Avoid unnecessary interface re-setup 2021-01-08 23:43:37 +01:00
validate.c ALSA: usb-audio: Fix endianess in descriptor validation 2020-02-01 09:06:11 +01:00