From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794318341; b=lqCiwDUjSIhMpm7khozI4BTnA9OLVALLYEkYYJcaBtT63aJ3fbEtnPv63oyoEhtKze3O VbyCtqJhE8mby8WUOh5k72q0kXP/ePNJRmjuizAnisTV1B1TwTrhRuC/DOlxKRSzSXa47 c3XD20ThZQe4A8HC4yJ9d+McLekfyDsjxgZwLZaR0R/4tX85p0hfpzLvIdzjh/3GJrJsK rhbHd6KsdT0DqnuyeoPe43nMF23W9A7g4tp9I7AzwNLHxWP5U0HDigHRbj16G3qNrm8LH geXzqoUa8ZcoR6njZf03Uhrmk1rhiM9TmdkC2mX92rswS32gkfqHzsAvnsmZkMSu1iQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794318341; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=ycYvR3vVfarx8mdA622tJE/2QomwViUUX8J1OZevYLo=; b=M1JrDCslWyGHTV0spfl0dyVek6hgBwJGZviM2QIFWQxhcu24RnUZyVMcBzuieYUDZhbC 5N9fg9xJZMwARqQaCBnUWPZkHu7E+9W3A5eKeK66FXJRF2t7laLx9YRI4+9w2yOjoaUf7 Uly2u9C45yynlki+9tQ/xXw1OEpHdk5+kjTZBmcXCaRtWVjgGgBXcRUtm/C6cnC+gUQ2O 3foXZQS1KKZhnWV5awlSxJ/t9P+hYmeag/rvqgiOQhJrbPVqgJklfFB5BYkiNGcjwuMbQ SDFdp1vODunTnELBGe9By8QGa0k50nPYKukHxvc/q8EvJVN8niXbrunSELy9osdqITw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=LmcSe54S; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9F23160A3804 for ; Tue, 10 Nov 2026 13:45:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=LmcSe54S Received: by smtp.kernel.org (Postfix) with ESMTPSA id B89BC1F0089F; Tue, 10 Nov 2026 13:45:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794318341; bh=ycYvR3vVfarx8mdA622tJE/2QomwViUUX8J1OZevYLo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=LmcSe54Ss1clYYEM6Glo493NmVvC1Y//ItbprOVimLbi57FImO/4Hfkxgbht/QSY8 y/6jCuGjj8riBhNRz0yLjaomSM6dloxHQOHuhAHRIV6zRAlpcft7e/A67xSVVVLEBv Ld9NdBiripD0+bZMyIPjAuHwj5R22o7C4CGV1NRCCa2t+E+tvpwBK3x0mzA60UeXEW LRAakOi88qAutn2uUDs2LUzSmiv9LpkgkTTF8WnGihhf5x7sNPy4n5aSLKZq+SQX+x ew52crz+dUBSBf9KPnQxe42QlT3xTBoyVmuHSHif7tK2qymW9XyMXyWc/aBRIhlLxN Xcjw6SO07PDiQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Olivier Kaloudoff , Takashi Iwai , Sasha Levin Subject: [PATCH 6.12.y 3/3] ALSA: usb-audio: Add mic resolution quirk for Logitech Webcam C200 Date: Tue, 10 Nov 2026 08:45:37 -0500 Message-ID: <20261110134505.1778565-3-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261110134505.1778565-1-sashal@kernel.org> References: <20261107052042-failed-6.12-874323b68c93@kernel.org> <20261110134505.1778565-1-sashal@kernel.org> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Olivier Kaloudoff [ Upstream commit 874323b68c93c6808e034dc0113681e822e6fb42 ] The C200 (046d:0802) reports a mic capture volume range of 1536..7680 with a resolution of 1 (6144 steps), triggering "Warning! Unlikely big volume step count (=6144), linear volume or wrong cval->res?" at probe and exposing a uselessly fine-grained mixer control. This is the same firmware behavior as the other UVC-era Logitech webcams already carrying QUIRK_FLAG_MIC_RES_384 (C500, C600, C210, C270, C310, C510, C525, ...), so apply the same quirk: CTL_MSG_DELAY_1M (which the Logitech VENDOR_FLG would provide if the device-specific entry did not short-circuit the lookup) plus MIC_RES_384. Verified on real hardware: with the quirk the warning disappears and the driver logs "set resolution quirk: cval->res = 384". Signed-off-by: Olivier Kaloudoff Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20261008230844.11246-1-olivier.kaloudoff@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/usb/quirks.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index cfcf9f845ee36..5a69bd87628a9 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -2160,6 +2160,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = { QUIRK_FLAG_DISABLE_AUTOSUSPEND), DEVICE_FLG(0x045e, 0x070f, /* MS LifeChat LX-3000 Headset */ QUIRK_FLAG_MIXER_PLAYBACK_MIN_MUTE), + DEVICE_FLG(0x046d, 0x0802, /* Logitech Webcam C200 */ + QUIRK_FLAG_CTL_MSG_DELAY_1M | QUIRK_FLAG_MIC_RES_384), DEVICE_FLG(0x046d, 0x0807, /* Logitech Webcam C500 */ QUIRK_FLAG_CTL_MSG_DELAY_1M | QUIRK_FLAG_MIC_RES_384), DEVICE_FLG(0x046d, 0x0808, /* Logitech Webcam C600 */ -- 2.53.0