From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Sakamoto Subject: Re: [PATCH 00/19][RFC v2] ALSA: firewire-motu: new driver for MOTU FireWire series Date: Mon, 30 Jan 2017 12:09:20 +0900 Message-ID: <5337c637-aae0-3d96-53d4-e1e55b1465e5@sakamocchi.jp> References: <20170129035417.2095-1-o-takashi@sakamocchi.jp> <20170129132239.GB15067@marvin.atrad.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from smtp-proxy002.phy.lolipop.jp (smtp-proxy002.phy.lolipop.jp [157.7.104.43]) by alsa0.perex.cz (Postfix) with ESMTP id EC3EB26690B for ; Mon, 30 Jan 2017 04:09:24 +0100 (CET) In-Reply-To: <20170129132239.GB15067@marvin.atrad.com.au> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Jonathan Woithe Cc: tiwai@suse.de, alsa-devel@alsa-project.org, clemens@ladisch.de, ffado-devel@lists.sf.net List-Id: alsa-devel@alsa-project.org On Jan 29 2017 22:22, Jonathan Woithe wrote: > On Sun, Jan 29, 2017 at 12:53:58PM +0900, Takashi Sakamoto wrote: >> However, this module cannot handle 828 correctly to generate sound. The >> reason is not clear yet. > > There is something odd about the 828 - I have observed this with FFADO. > While capture works fine, playback remains resolutely muted. Not resolutely. With this module, in the beginning of packet streaming, the unit can generate sound for quite a short period. Currently I have a hypothesis that this issue comes from missing synchronization on a path between PDI 1394L21BE and QuickLogic DA828FW. As the name implies, the latter IC is designed by S&S research Inc. just for this unit, and there's less information. Don't behave with your over-generalization, if being a reasonable person. Regards Takashi Sakamoto