On 11/04/2015 06:41 PM, Caleb Crome wrote:
On Wed, Nov 4, 2015 at 8:53 AM, Roberto Fichera kernel@tekno-soft.it 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=16I 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@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel