[PATCH v3 0/3] ALSA: usb-audio: fix for UAC2 mixer unit handling

[Takashi Iwai <tiwai@suse.de>]

Hi,

here is a revised series of patches to address a long-standing issue
about handling of UAC2/3 mixer unit.  We have some translation between
UAC1 and UAC2/3 feature and mixer units, but the latter is handled
incorrectly with a bogus wIndex.  Also, the current code tries to
retrieve the information by multiple calls even though UAC2/3 can
already give in a shot.  So there is an optimization for that in the
last patch, too.

Link: https://lore.kernel.org/d46fcac6-bd7e-4fc4-95e1-4e8d39f92ad3@zipdox.net


Takashi

v1: https://lore.kernel.org/20260929121558.1464094-1-tiwai@suse.de
v2: https://lore.kernel.org/20260930132419.297102-1-tiwai@suse.de

===

Takashi Iwai (3):
  ALSA: usb-audio: Check mixer matrix size for UAC2/3 at parsing
  ALSA: usb-audio: Fix UAC2 mixer unit request handling
  ALSA: usb-audio: Optimize min/max/res parse for UAC2

 sound/usb/mixer.c | 244 +++++++++++++++++++++++++++++-----------------
 sound/usb/mixer.h |   2 +
 2 files changed, 154 insertions(+), 92 deletions(-)

-- 
2.55.0