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=1794047590; b=PD5n6XMZG9in1x8EBdVdktPJP2h3FdQQ69C+mRLAgH7N0yJR6QWTLqAsfm255ieTN1VH rwW2p/8W4RhKCLL9dcom20OYzprC4Bf8g6d6uiVF6uuLUTNUd/xwwFZwm/lu4/GzWJYDQ Qm0yRdEwMzkFJkRUu1Mlk0/AeFaaCvryyRSDKeVMEq5a9ZjS1aA1sHvQUj/dKy3R0MNzT d7nuSUHZ7jBx36VtobwgvyTjf5DOh3519jMQfN9pEvHhjRSn8RRiK12ccmky3tVSavf0E iHiFWu1a+uf4j8kScH5yI87zmNqod9hskIogo5EKMjUNoDMXOXgaMtaZaw4fPVUy2mQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794047590; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=H1pc50CLvy9CRuGISxdUiJVME5NFLsvJQa4EMyP6FYA=; b=4N4WPS4QdvjpdjRCYJ4MYBVJmz/p5WaF/m6NPuhLf5MD2S5HIyHGbvPIGhOFVn9oxhdQ U57jT3SUBCw+jRie+JEgJZ9FHaCo8uEVxIJTMmr2bdMq+Z4BSHUZz4Ok01EoOZ2cdC62a nJqWxbwk7tKMqoAaAvFmlFjY4zLk3HLA5vdEdizwNTmj8EaR6oXajZzO7q7qYBq1iROxQ GWFqVgaM8SKGF9q3KLZ4xeFdIkgHHQGiBtxiuUWrB+YeT8iPiekNI9G8zTGjg57Qz+MQg xOIM71LaI8pvkx8jY14Gq2h/rsmJnJj5BAgq8kyeQFbY/9y5jxJ7UP4u0D6XMmF11/A== 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="K1t+lk/3"; 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 83121606A326 for ; Sat, 7 Nov 2026 10:33:10 +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=K1t+lk/3 Received: by smtp.kernel.org (Postfix) with ESMTPSA id F11181F0089F; Sat, 7 Nov 2026 10:33:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794047590; bh=H1pc50CLvy9CRuGISxdUiJVME5NFLsvJQa4EMyP6FYA=; h=From:To:Cc:Subject:Date; b=K1t+lk/3JDatok/A2UbByJNO/wPEkY7fU3WSDekpb6xadDzLsvu/95FX/AvRK/P/j SU80QxKnGQ9yEBXffrEkmJucdsi36ykjt+pRfCLYLKvqnQ4pSiAC+I/t3tbzAYVF4+ jXUKt15tZ8Cp8/4700SusHzo+9BYGditTfi8rcAHYHvY/ueQf60j9GvmR3hz6HzKQs +eSOarrRr1LVsrmL+wKGmMQYzl3LfQ80outTtrEMbrCOh8ZQNTJSK1ff7Uf+tIr18Y IA2VepExnfXVO1Cj5kUTLyHrBSCSgB+cqKWezUHkmReYOh/UVKivEZjC46aqskCPNc qjakLNaT+PPUA== From: Sasha Levin To: olivier.kaloudoff@gmail.com, tiwai@suse.de Cc: stable@vger.kernel.org Subject: FAILED: patch "[PATCH] ALSA: usb-audio: Add mic resolution quirk for Logitech Webcam C200" failed to apply to 6.6-stable tree Date: Sat, 7 Nov 2026 05:33:08 -0500 Message-ID: <20261107053308-failed-6.6-874323b68c93@kernel.org> X-Mailer: git-send-email 2.53.0 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 874323b68c93c6808e034dc0113681e822e6fb42 # git commit -s git send-email --to '' --in-reply-to '20261107053308-failed-6.6-874323b68c93@kernel.org' --subject-prefix 'PATCH 6.6.y' 'HEAD^..' Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 874323b68c93c6808e034dc0113681e822e6fb42 Mon Sep 17 00:00:00 2001 From: Olivier Kaloudoff Date: Fri, 9 Oct 2026 01:08:44 +0200 Subject: [PATCH] ALSA: usb-audio: Add mic resolution quirk for Logitech Webcam C200 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 --- sound/usb/quirks.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 170f68db74fa4..7a5c95de86ceb 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -2494,6 +2494,8 @@ 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