On Wed, Nov 04, 2015 at 06:52:12PM +0100, Roberto Fichera wrote: > > I notice your DMA buffer length is very short, which would require > > very frequency interrupts to service, right? Can you increase your > > DMA buffer length by increasing the period size? Maybe that would > > help reduce the likelyhood of a failure. > > Not sure if this can help! SSI TDM is set to 32 slots but only 2 are masked. So every frame only > 2 slots are pushed/pulled from the FIFOs. maxburst is set to pull a block of 8 elements from the > FIFOs, DMA cyclic call it period. So the full DMA buffer is filled in buffer size / period DMA iterations. A smaller period size may course DMA buffer over/underrun -- ALSA over/underrun even though it seems that you didn't report any. And apparently SDMA would get more interrupt/callbacks. I would suggest a larger period size and buffer size although I cannot tie your problem with the size. But you may try. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
