Takashi Iwai b96681bd58 ALSA: usb-audio: Initialize every feature unit once at probe time ... So far we used to read the current value of the mixer element dynamically at the first access, and the error from a GET_CUR message is treated as a fatal error (unless QUIRK_IGNORE_CTL_ERROR is set). It's rather inconvenient, as most of GET_CUR errors are no fatal, and we can continue operation with assumption of some fixed value. This patch makes the USB-audio driver to change the behavior at probe time; now it tries to initialize the current value of each mixer element that is built from a feature unit (those for typically for mixer volumes and switches). When a read failure happens, it tries to set the known minimum value. After that point, a cached value is used always, hence we won't hit GET_CUR message error any longer. The error from GET_CUR message is still shown as a warning normally, but only once at the probe time, and it'll keep operating. If the message is confirmed to be harmless, it can be shut up by QUIRK_IGNORE_CTL_ERROR quirk flag, too. Tested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20211014130636.17860-4-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>		2021-10-14 16:51:56 +02:00
..
6fire	module: remove never implemented MODULE_SUPPORTED_DEVICE	2021-03-17 13:16:18 -07:00
bcd2000	ALSA: Convert strlcpy to strscpy when return value is unused	2021-01-08 09:30:05 +01:00
caiaq	module: remove never implemented MODULE_SUPPORTED_DEVICE	2021-03-17 13:16:18 -07:00
hiface	module: remove never implemented MODULE_SUPPORTED_DEVICE	2021-03-17 13:16:18 -07:00
line6	ALSA: line6: Fix racy initialization of LINE6 MIDI	2021-05-19 16:25:57 +02:00
misc	module: remove never implemented MODULE_SUPPORTED_DEVICE	2021-03-17 13:16:18 -07:00
usx2y	ALSA: usx2y: Prefer struct_size over open coded arithmetic	2021-09-21 18:38:11 +02:00
card.c	ALSA: usb-audio: Unify mixer resume and reset_resume procedure	2021-09-13 15:00:31 +02:00
card.h	ALSA: usb-audio: Improved lowlatency playback support	2021-09-30 13:55:24 +02:00
clock.c	ALSA: usb-audio: fix comment reference in __uac_clock_find_source	2021-09-28 10:17:08 +02:00
clock.h	ALSA: usb-audio: Constify audioformat pointer references	2020-11-23 15:15:36 +01:00
endpoint.c	ALSA: usb-audio: Fix packet size calculation regression	2021-10-01 12:54:56 +02:00
endpoint.h	ALSA: usb-audio: Avoid killing in-flight URBs during draining	2021-09-30 13:55:26 +02:00
format.c	ALSA: usb-audio: Move rate validation quirk into quirk_flags	2021-08-02 09:06:03 +02:00
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: disable implicit feedback sync for Behringer UFX1204 and UFX1604	2021-10-01 08:57:34 +02:00
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	ALSA: usb-audio: fix spelling mistakes	2021-07-05 19:33:54 +02:00
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 potential out-of-bounce access in MIDI EP parser	2021-05-11 11:10:37 +02:00
midi.h	ALSA: usb-audio: generate midi streaming substream names from jack names	2021-03-01 09:21:54 +01:00
mixer_maps.c	ALSA: usb-audio: Move ignore_ctl_error check into quirk_flags	2021-08-02 09:06:05 +02:00
mixer_quirks.c	ALSA: usb-audio: Add support for the Pioneer DJM 750MK2 Mixer/Soundcard	2021-10-10 22:26:58 +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 spelling mistakes	2021-07-05 19:33:54 +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: usb-audio: Fix a missing error check in scarlett gen2 mixer	2021-09-30 13:48:51 +02:00
mixer_scarlett_gen2.h	ALSA: usb-audio: scarlett2: Improve driver startup messages	2021-05-21 16:22:52 +02:00
mixer_scarlett.c	ALSA: usb-audio: fix spelling mistakes	2021-07-05 19:33:54 +02:00
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: Initialize every feature unit once at probe time	2021-10-14 16:51:56 +02:00
mixer.h	ALSA: usb-audio: Unify mixer resume and reset_resume procedure	2021-09-13 15:00:31 +02:00
pcm.c	ALSA: usb-audio: Less restriction for low-latency playback mode	2021-10-12 14:32:46 +02:00
pcm.h	ALSA: usb-audio: Make snd_usb_pcm_delay() static	2021-06-02 09:01:17 +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: 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	Merge branch 'for-linus' into for-next	2021-10-14 15:54:30 +02:00
quirks.c	ALSA: usb-audio: add Schiit Hel device to quirk table	2021-10-14 14:39:06 +02:00
quirks.h	ALSA: usb-audio: Move interface setup delay into quirk_flags	2021-08-02 09:06:02 +02:00
stream.c	ALSA: usb-audio: Move tx_length quirk handling to quirk_flags	2021-08-02 09:05:57 +02:00
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	2021-08-30 08:04:04 +02:00
validate.c	ALSA: usb-audio: Fix endianess in descriptor validation	2020-02-01 09:06:11 +01:00