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=1794318959; b=W/uluxxHIiMYPCgWCVu1FaKlfwYVjzqSs4niycurW08ogedTvJcfE0Gx9+hIfAjirKr2 iHkAXa2uXRdqQXZpZW3o2X/43CVBuiB1m2BTHcgRPXLEfHrXxiXVMyrTP/1A9Ai8ZsMTU iXkNjJ1WGxFV6r3d5v356367GYLV7gOajuhA39lrKJL8rLlfhBcaaiBPtpWnQEVWEisQs wW5OWJ/qcHPrCdCw8BOnAVtUg3sRQpskfFl33XMEw/g0JTpr7Y1Tk2uB2+XWyq2ISjifM 8alqY2Z81OaImGFijcGbOASemzftUsSNDLr+jUf1IdR/9uCRPFSdxV+TWEAftlwutiA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794318959; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=hcS3OGPwvmwrrngFYy8jLa3bGHte21mZaEALoMq1m0A=; b=mFbJOhW9EaWhuqDUWtziZ3Wbm99gVzzQV6hCf6mUIZIhkvoHcTH0mEVrAIEn1s24Zzc+ yKAxWKbSK4Qh+lXdqxHTxa2qCz1vMW7F1+YPsmjwr/+t6Jtjt2vce+1yf7T85AobL8U1x 0fopL/N52ti8MpMP3YvxRThIkUl3ZQSmhBTZTDMzTuLWsuwQDIZh4U4+l/BF+JLTzRGLn u3oJqlVvGw079XtyEtDSNziypyCE5/dMRXYxPdbN9A20m3sm3hoGBOinc4HTrBSHbW67B g0E9SCSZjWVIM4kQhFdt9bwrQ3F/Tr6c2KpMyoA+jy32BWducDvhxsP/73PB24K45jA== 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=n4VLBEkA; 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 D7CCA606A333 for ; Tue, 10 Nov 2026 13:55:58 +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=n4VLBEkA Received: by smtp.kernel.org (Postfix) with ESMTPSA id 338C81F0089F; Tue, 10 Nov 2026 13:55:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794318958; bh=hcS3OGPwvmwrrngFYy8jLa3bGHte21mZaEALoMq1m0A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=n4VLBEkAPSbl4QYbQXgxHhb4Q1CyNtfEFJS0DUJn2tDacGHrN1094TuFXyywHZhUJ tH8BhA92EQNaOkj6flIjPRYVKYp2qxUowbmtVKNGQwlmlvP73D0CYogq30wwXEDGa6 8OynU/78GGLVQU9k7aCmCuJJXoYaoqhBM+erQLsGIzBQOCpOlM58GKToch1KNpjk4P 1hJ0LgT0Isvbp27TeaBF4vv4LDR0TbynvSsWw/Ur/00c8xWzYwS8/NIEYBfL0F8yeC Eu4L/dVe0k6yGQ5x62GV1JpRrFilIhDK5T1m94+V+TjJR4S9R6RO+Kx+57iD6QD7v+ sm3nAypVayRyg== From: Sasha Levin To: stable@vger.kernel.org Cc: Olivier Kaloudoff , Takashi Iwai , Sasha Levin Subject: [PATCH 6.1.y 3/3] ALSA: usb-audio: Add mic resolution quirk for Logitech Webcam C200 Date: Tue, 10 Nov 2026 08:55:55 -0500 Message-ID: <20261110135524.1805283-3-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261110135524.1805283-1-sashal@kernel.org> References: <20261107054605-failed-6.1-874323b68c93@kernel.org> <20261110135524.1805283-1-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 52164ae35250c..45a2753d483cf 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -2058,6 +2058,8 @@ 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