On Wed, Dec 07, 2016 at 04:44:55PM +0000, Måns Rullgård wrote: > Vinod Koul <vinod.koul@xxxxxxxxx> writes: > >> > >> What you're proposing, Vinod, is to make a channel exclusive > >> to a driver, as long as the driver has not explicitly released > >> the channel, via dma_release_channel(), right? > > > > Precisely, but yes the downside of that is concurrent access are > > limited, but am not sure if driver implements virtual channels and > > allows that.. > > My driver implements virtual channels. The problem is that the physical > dma channels signal completion slightly too soon, at least with > mem-to-device transfers. Apparently we need to keep the sbox routing > until the peripheral indicates that it has actually received all the > data. So do we need concurrent accesses by all clients. -- ~Vinod -- 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
