[alsa-devel] [PATCH 08/10] ASoC: dmaengine_pcm: Add open function for DT DMA request
mpa at pengutronix.de
Fri Mar 15 10:07:03 CET 2013
On Fri, Mar 15, 2013 at 11:42:48AM +0800, Shawn Guo wrote:
> On Thu, Mar 14, 2013 at 02:08:32PM +0100, Markus Pargmann wrote:
> > On Wed, Mar 13, 2013 at 10:18:29AM +0800, Shawn Guo wrote:
> > > On Tue, Mar 12, 2013 at 07:02:07PM +0000, Mark Brown wrote:
> > > > On Sun, Mar 10, 2013 at 07:33:09PM +0100, Markus Pargmann wrote:
> > > > > Add a function to open a DMA PCM substream using devicetree data
> > > > > provided via the client device node. The patch introduces a public
> > > > > function and a private subfunction that is called by both open
> > > > > functions.
> > > >
> > > > Someone (I think it was Shawn) sent a very similar patch just recently
> > > > which appears to have fallen out of my inbox unfortunately - can you
> > > > please check what's going on there and coordinate with them? Let me
> > > > know if you can't find the patch and I'll dig it out.
> > >
> > > It's here, Markus.
> > >
> > > http://thread.gmane.org/gmane.linux.alsa.devel/106027/focus=106031
> > >
> > Thanks. Do you already have a patch for the non-generic function which I
> > could use instead?
> I do not follow. With my patch in place, there will be two
> dmaengine_pcm APIs.
> int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream,
> dma_filter_fn filter_fn, void *filter_data)
> int snd_dmaengine_generic_pcm_open(struct snd_pcm_substream *substream,
> struct device *dev, const char *name)
> The first one is for users that their dmaengine driver hasn't converted
> to generic device tree bindings, and the second one is for users that
> their dmaengine driver is converted to generic device tree bindings.
Sorry, I mixed up different patch versions and was confused.
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