From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DF1BB3ED136; Tue, 17 Mar 2026 16:41:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773765670; cv=none; b=rvHn14dDs/ZA1Orh/InyN6m+hNcEVmlenB8t16plcN+5+oqCJ57JNibcfl6JemOQUN68eL8fj5+V9sTlJeggDJyskEk2m9OLuhgZhwoNQ5Pxb7AnhjiaA1nj3b+XT0PBa9LtSjl6dyjC2crsicJkDDZQwzUbqZW453/dWIcfM9Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773765670; c=relaxed/simple; bh=jh/ip1/5HQoRM9U+FZaO5MBEGzrneBAR8kun9FlHEtY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FZJX6FgSZMzXgSG1583tmD+bJWAhhntpR3foVOc6JnlwzUBTUNgPWw9dWIdtA7o9cmz4qlSDFNwxdeuokjmpXm7zBjGCRNYcNqk4Qoo9Seq6Rdd1AniOJV1/66AdWjR56U/4nIGLS3NcMxQ8PALfwps7F2dGyqX6O9Ms9j7SBrM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Z2gUXHzl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Z2gUXHzl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52FE3C19424; Tue, 17 Mar 2026 16:41:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1773765670; bh=jh/ip1/5HQoRM9U+FZaO5MBEGzrneBAR8kun9FlHEtY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z2gUXHzlBpgV48rt2oEY98IbFrfzdExW/dgpvC1XK1A8vzcY7lufKQRmhpoOhSktt sJ9AtWvNswzUA0lscnRW0Yn8NsXLdyTMln7MfsZuzwUyg2qlShWeVI3IiHF2GiUU0e zwVP560eFP+U1Gvx42OhoRboRPHxkbKqqxcQvarY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Takashi Iwai , Sasha Levin Subject: [PATCH 6.19 023/378] ALSA: usb-audio: Avoid implicit feedback mode on DIYINHK USB Audio 2.0 Date: Tue, 17 Mar 2026 17:29:40 +0100 Message-ID: <20260317163007.827897150@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260317163006.959177102@linuxfoundation.org> References: <20260317163006.959177102@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai [ Upstream commit c5bf24c8aba1ff711226ee0f039ff01a5754692b ] Although DIYINHK USB Audio 2.0 (ID 20b1:2009) shows the implicit feedback source for the capture stream, this would cause several problems for the playback. Namely, the device can get wMaxPackSize 1024 for 24/32 bit format with 6 channels, and when a high sample rate like 352.8kHz or 384kHz is played, the packet size overflows the max limit. Also, the device has another two playback altsets, and those aren't properly handled with the implicit feedback. Since the device has been working well even before introducing the implicit feedback, we can assume that it works fine in the async mode. This patch adds the explicit skip of the implicit fb detection to make the playback running in the async mode. Link: https://bugzilla.kernel.org/show_bug.cgi?id=221076 Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20260225085233.316306-4-tiwai@suse.de 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 a89ea2233180a..caca0e586d832 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -2363,6 +2363,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = { QUIRK_FLAG_SHARE_MEDIA_DEVICE | QUIRK_FLAG_ALIGN_TRANSFER), DEVICE_FLG(0x2040, 0x7281, /* Hauppauge HVR-950Q-MXL */ QUIRK_FLAG_SHARE_MEDIA_DEVICE | QUIRK_FLAG_ALIGN_TRANSFER), + DEVICE_FLG(0x20b1, 0x2009, /* XMOS Ltd DIYINHK USB Audio 2.0 */ + QUIRK_FLAG_SKIP_IMPLICIT_FB | QUIRK_FLAG_DSD_RAW), DEVICE_FLG(0x2040, 0x8200, /* Hauppauge Woodbury */ QUIRK_FLAG_SHARE_MEDIA_DEVICE | QUIRK_FLAG_ALIGN_TRANSFER), DEVICE_FLG(0x21b4, 0x0081, /* AudioQuest DragonFly */ -- 2.51.0