[alsa-devel] [PATCH 12/18] ARM: s3c64xx: Add support for DMA using generic amba-pl08x driver
broonie at kernel.org
Tue Aug 13 22:35:36 CEST 2013
On Tue, Aug 13, 2013 at 01:10:02PM -0700, Tomasz Figa wrote:
> On Tuesday 13 of August 2013 18:52:51 Mark Brown wrote:
> > On Sun, Aug 11, 2013 at 07:59:24PM +0200, Tomasz Figa wrote:
> > > +#define pl330_filter pl08x_filter_id
> > So, this is pretty fun and probably not going to play too nicely for
> > multiplatform kernels...
> Yes, this is really funny and only shows the brokenness of current channel
> filtering mechanism used in DMA engine subsystem. Fortunately this is
> quite irrelevant to multiplatform kernels, because no users of it will be
> compiled in, since it's used only for legacy (non-DT) channel filtering.
Well, the thing here is more about the fact that the match function is
silently being hijacked - it should be possible to do this in the device
registrations. I'd expect you could get a non-DT kernel which was
affected, but you'd probably have to try.
> Anyway, I would happily redesign and rewrite the DMA engine channel
> matching completely to make it much more sane, but I guess I would need an
> ack from Vinod and Dan to do it.
I'd be really keen to get this code merged sooner rather than later for
ASoC development so if there's a way to do it separately to fixing the
filtering that'd be good.
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