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=1794318627; b=fp58VLGtjZF7Fnd0SNA4u2/Rl9GxPNJ0MEXpipL6fWDpIgNfpXpn18skpEZ/q2Vm2W1S bjzDk/QwCDjRkwJEJ9HsTONmN+abftEaHmi4aHPe11cm2UMaZMXelPSPVxwUS/6x2IVJI wk8FdoEVl60JOO8v26Dq+nggY0SKNP0piAQajMUQ+vSByCHubclGMAqvVIXlhEvxVWlUU wKk/SrpLWKTzxHNThWGSv+FGmeI+oqfFuMe8xVz10MwY91czqTuLdJR69Mck6cdAIuldM yhXPe/YZrBenkU3G7zF8D9cuzcWKCCRgekiQ4g45mPzVjaVa3osuZmtAB4CNa1hxqzg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794318627; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=7EesqnqZ7xdGFu8ZvrDBetxENf9joKC8YN/fej4+Csg=; b=mXGc1Bfx8jefCP0QhjSQwCbU/TrWK1Q94R4fkBUd4c91cUzia8wsXkx7NsP9MIO3OO5w pgvAY96wqrklW37X+o2BDDz7Sz+uR2Sja6McBxrhVX6MuoqK4XUzFTCfDuUHHKKl2DrDc 1Xg2e6eFLmNSg1Vuir0PGeqf00YXRNCaWATiwl6Qfkviq8p4YLmnzrshLr4thXGAE05R5 lF12/21ibEG0lPCszozvivA7iZ/pJsbP2zI43xhdiipwIDLIbRbWoKIx0KUEajArDsH/E PJJnTnFD9qZzZQkO9/+MvecIStR9n38DBsqBnW/YZN+pkE1M5CdOYLnC64rI46XXTMw== 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=kwfb8CVD; 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 DF91E606A339 for ; Tue, 10 Nov 2026 13:50:26 +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=kwfb8CVD Received: by smtp.kernel.org (Postfix) with ESMTPSA id 396DF1F0089F; Tue, 10 Nov 2026 13:50:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794318626; bh=7EesqnqZ7xdGFu8ZvrDBetxENf9joKC8YN/fej4+Csg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kwfb8CVD3t1175V8Qx+8feXkEEe2briQRtWVZwZABRtGCOSmsoH01dipLeYKPZEF5 z1S7D2ADnzbAs8qtVd2hoTgPawU4Fn0MlWVkpKniRQb/E7wmH4gaP246LtXVWKXjr5 wssGn2xDp4PUAoFbYP19QKantf61SvZpZ6HV0MRbHq8DaaTtSQz1tLuos2svj4ygzR OHlZLYI2Rl+js8Bb97RVwUib5zevzT3Y2ZmaQGngScRyDVOFUvmIq1ZMh5i/2XMG6x oO2bvW+cZ1Bwd4q8m9cDKfKwZcNOtOzE1RgzYWoaHwTJneugxBt/RKZ+1EdrQEs+7t /Dy4BGDxEWs3w== From: Sasha Levin To: stable@vger.kernel.org Cc: Olivier Kaloudoff , Takashi Iwai , Sasha Levin Subject: [PATCH 6.6.y 3/3] ALSA: usb-audio: Add mic resolution quirk for Logitech Webcam C200 Date: Tue, 10 Nov 2026 08:50:23 -0500 Message-ID: <20261110134954.1794308-3-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261110134954.1794308-1-sashal@kernel.org> References: <20261107053308-failed-6.6-874323b68c93@kernel.org> <20261110134954.1794308-1-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 302736f271932..321eaaf9fa334 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -2060,6 +2060,8 @@ 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