It was just easier to code it to do an exact /2 rather than a programmable periodic value, which is what i'm going to implement next. I notice that after 1 full buffer, the IRQ handle time (from entry to handled) for snd_pcm_period_elapsed is almost 1/2 of a second. Is that expected for large (64K) buffers, especially with only 2 periods? Does the buffer copy at the period intervals for period sizes? or at the buffer_bytes size? If the copy is on the period size, then I really should implement the programmable periods in the DMA. On Fri, Aug 5, 2016 at 1:18 AM, Clemens Ladisch <clemens@xxxxxxxxxx> wrote: > Rob Nertney wrote: > > I've rewritten the DMA to fire an IRQ only at the write-completion of > > (buffer_bytes/2) and (buffer_bytes) > > Is the DMA actually restricted to two interrupts per buffer? If not, > your driver should support arbitrary period sizes. > > > Regards, > Clemens > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
