On 11/04/2015 06:41 PM, Caleb Crome wrote: > On Wed, Nov 4, 2015 at 8:53 AM, Roberto Fichera <kernel@xxxxxxxxxxxxx> wrote: >> On 11/04/2015 04:33 PM, Roberto Fichera wrote: >>> *RX DMA frame count=36795* >>> RX DMA addr=0x9ef0e000 >>> RX DMA buffer len=16 >>> *TX DMA frame count=36795* >>> TX DMA addr=0x9ee49000 >>> TX DMA buffer len=16 > > 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. > Although it would be good to > be able to recover from a failure gracefully. Yep! I will try to restart the DMA channels from a failure to see if this might work or not. > -Caleb > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
