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Wed, 30 Sep 2026 13:24:26 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id IluyAYoNvWr8MQAAD6G6ig (envelope-from ); Wed, 30 Sep 2026 13:24:26 +0000 From: Takashi Iwai To: linux-sound@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Zipdox Subject: [PATCH v2 0/3] ALSA: usb-audio: fix for UAC2 mixer unit handling Date: Wed, 30 Sep 2026 15:24:03 +0200 Message-ID: <20260930132419.297102-1-tiwai@suse.de> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.997]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,imap1.dmz-prg2.suse.org:helo] X-Spam-Flag: NO X-Spam-Score: -2.80 X-Spam-Level: Hi, here is a 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, 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 v1->v2: addressed a few issues spotted by sashiko === 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 | 241 +++++++++++++++++++++++++++++----------------- sound/usb/mixer.h | 2 + 2 files changed, 152 insertions(+), 91 deletions(-) -- 2.55.0