On Thu, Aug 20, 2009 at 11:45:07PM +0800, Shine Liu wrote: > > The callback doesn't need to be set up within the trigger function - if > > it's done before the trigger functions are called then the DMA trigger > > can call it. Off the top of my head I'd expect it's possible to set it > > up when the device is opened. > Who call the DMA trigger? When? In any of the platform/cpu_dai trigger > functions? It's called ultimately by user space; within ASoC it's always called by the core trigger function in the fixed order that it has. The open() callback would be a safe place to do the setup - that's called before anything else. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
