On Thursday 08 October 2015 22:25:50 M'boumba Cedric Madianga wrote: > > > > How do you know which channels are available for memory-to-memory > > transfers? > For memory-to-memory transfer we don't need any channel/request combination. > We look for any available channel in the channel list to execute our transfer. > So, as often as possible, we expect that a peripheral release his > channel after transfering data. > In that way, we always should have at least one channel available for > that kind of transfer. > Ah, got it. So the use of virtual channels in this driver makes MEM2MEM transfers work, but is otherwise not required. Thanks for the clarification. Arnd -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
