On Mon, Jul 15, 2013 at 06:26:43PM +0100, Mark Brown wrote: > On Mon, Jul 15, 2013 at 06:42:10PM +0200, Lars-Peter Clausen wrote: > > > + hw.period_bytes_min = 16; > > + hw.period_bytes_max = dma_caps.max_sg_len; > > We can't read the minimum period size from dmaengine? Seems like > something might have a restriction other than 16 bytes here. max would be how many list items the engine supports so queried therotical min would be 1 byte, not sure how 16 bytes is assumed above but my guess is that if engine is able to push min burst lengths which would be 1 and give you interrupt. But seriously, that would not be practical. So this should be a realistic limit which system can cope with.
~Vinod
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