[PATCH 5/6] dmaengine: imx-sdma: fix up param for the last BD in sdma_prep_slave_sg()
s.hauer at pengutronix.de
Fri Jan 21 05:24:24 EST 2011
On Fri, Jan 21, 2011 at 11:15:39PM +0800, Shawn Guo wrote:
> Hi Sascha,
> On Thu, Jan 20, 2011 at 11:28:08AM +0100, Sascha Hauer wrote:
> > On Thu, Jan 20, 2011 at 05:50:39AM +0800, Shawn Guo wrote:
> > > As per the reference manual, bit "L" should be set while bit "C"
> > > should be cleared for the last buffer descriptor in the non-cyclic
> > > chain, so that sdma can stop trying to find the next BD and end
> > > the transfer.
> > >
> > > In case of sdma_prep_slave_sg(), BD_LAST needs to be set and BD_CONT
> > > be cleared for the last BD.
> > Did you test this patch?
> Would you suggest any driver on mx51 using this api? So that I can
> test it on my babbage board. Or you can help test it with mx27/31
> mmc driver? I do not have them on my end. Thanks.
I can only suggest the imx/imx-sdma-sound-mx353ds-mx51_babbage
branch, but this only uses cyclic transfers so you can't use it
to test this patch.
I asked because I could add an ack to this patch if it has been
tested. Without testing I'd like delaying it until I found some
time testing it.
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