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 5FFAB1373 for ; Wed, 6 Mar 2024 20:37:32 +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=1709757452; cv=none; b=Wghiilal89Nyz4wr7DpfjeuTKlMkzRxkMlDJTFnmMjMvBpguWWXRKb3c6OjNngJrOOt2xm+K4N0w5uCLuyx+H8oTd0szihNjiReraC+895a3948wz740ECpFHmRgt8JTlY4pxtRTB2icGN5eeSaj3vSu+BXhdLHIXFkxwj/P9Xw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709757452; c=relaxed/simple; bh=piWR/wk6PEK58e2lGwA30alp4qzCJjfG5AgybpPWwUs=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=QZruOfwfoECT62DBYRor85SDkfyrPIvrF4wXmw1It5zzHUqpEvctAQ6k9KVL5VK069Ys4NtKChDGEPbus7kjCuK21bfQoJCxf0zjxzM8GR9NTfjWp6RjMOFW6FwJq8puSKuLnm8M1rYclhEB14g/5QSSdbeelmaa6rK0khwqu7A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PmApm0DK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PmApm0DK" Received: by smtp.kernel.org (Postfix) with ESMTPS id E6042C433C7 for ; Wed, 6 Mar 2024 20:37:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1709757451; bh=piWR/wk6PEK58e2lGwA30alp4qzCJjfG5AgybpPWwUs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=PmApm0DKvjYiersLRTXN3oQd5lK2v+M2WSru4D06RojzX4uF0lB8d8TAK2EGgTdq3 O9AjTtSRholGOOGeqSfkl+IwHXWDzyrH5lpviZI+x31ngAvvK3l9+MsuEQ/PVcJZwu pMXKCX3Xelta5C2dP4IdvRoM7mpUHWIX25lREBw+RMY3R8DOd50MeT+73U8qutVIUR E8M2VCT440Xm4Kx7P93hbj70mwRnjKYppT9tmKd4qhf+ffEK9Uv3osclyuqwen81wG eXBSAyPcN4hYy/ZY3DUS3eWJSiKRAkdEsHr+Fuj+1h1h1E2o8FScsBe3kaUWFHZvz9 J7icYaYkXmI+g== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id D02C3C53BD0; Wed, 6 Mar 2024 20:37:31 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 218544] not enough bandwidth, synaptics hi-res audio duplex audio Date: Wed, 06 Mar 2024 20:37:31 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: stern@rowland.harvard.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D218544 --- Comment #11 from Alan Stern (stern@rowland.harvard.edu) --- The most obvious difference is that the "good" device requires only 85 us/f= rame for its audio-in channel whereas the "bad" device requires 234 us/frame. T= his is the difference between 16-bit and 24-bit captures that you mentioned originally. (The 39 vs. 24 for the interrupt endpoint wouldn't have a significant effect.) There could be other factors in play, but that differ= ence is likely enough to tip the balance. The times in the bandwidth file indicate that audio subsystem is using the device's higher bandwidth setting. Using the lower bandwidth setting inste= ad could well make a difference. I don't know how to tell the sound interface= to do this; maybe Takashi can say. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=