Date: Mon, 11 Jan 2010 15:59:00 +0100 (CET)
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
To: linux-kernel@vger.kernel.org
cc: Dan Williams <dan.j.williams@intel.com>,
       Maciej Sosnowski <maciej.sosnowski@intel.com>
Subject: dmaengine: query current transfer status
Message-ID: <Pine.LNX.4.64.1001111550270.6492@axis700.grange>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 907
Lines: 21

Hi

I'm using the dmaengine API with an ASoC driver (soon to be submitted), 
and I have to provide a callback to ALSA to query the progress of the 
current transfer (the .pointer() method from struct snd_pcm_ops). 
Currently I only can provide this information with a period size 
precision. Wouldn't it make sense to add an optional hook to dmaengine for 
that? I certainly could add this as a platform-specific extension to the 
specific dmaengine driver, I'm using (shdma), but that'd be ugly. Ideas? 
Specific proposals for the prototype? I could cook up a patch if there are 
no principal objections against this.

Thanks
Guennadi
---
Guennadi Liakhovetski
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/