I'm seeing a weird issue where ALSA doesn't ever hit the pointer function, and we go straight from START to STOP. Debugging the DMA, we get IRQs, I call the period_elapsed.

It looks like we hit STOP before we even get the first IRQ. I've checked my parentheses, and theres no overrun or underrun messages. I don't hit the close function, nor any other functions until i control-C. Once I do that, I get a large series of pointer() printks showing multiples of IRQ positions, as if it queued up the commands...

I thought I was IRQing too fast maybe, but as mentioned above, the irqreturn function doesn't even get called before we STOP.

What in aplay would instantly force a STOP?

Audio plays a few frames (I can hear a chord), then stalls and repeats until i Ctrl-C.

Thanks, Rob