linux-kernel - Re: [alsa-devel] [PATCH 2/2] ASoC: dmaengine-pcm: Add support for querying stream position from DMA device

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Message-ID: <20120611153550.GW11439@opensource.wolfsonmicro.com>
Date:	Mon, 11 Jun 2012 23:35:53 +0800
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Vinod Koul <vinod.koul@...el.com>, alsa-devel@...a-project.org,
	Liam Girdwood <lrg@...com>, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH 2/2] ASoC: dmaengine-pcm: Add support for
 querying stream position from DMA device

On Mon, Jun 11, 2012 at 05:20:09PM +0200, Lars-Peter Clausen wrote:

> Another option is to provide the current implementation of the pcm_pointer
> as a standalone legacy function, which can be used by the old platforms
> until their dmaengine drivers have cached up. And add a new residue-only
> implementation which will be mandatory for new drivers. That would make it
> more explicit that those platforms are sort of broken and need to be fixed.
> After all of them have been fixed the legacy pcm_pointer implementation can
> be removed.

This seems like a good approach, yes.

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