You may need to dump mmio VORTEX_SMP_TIME which is tick at 48000 * 256
Hz (what is the clock printed at the oscillator on your au8820 sound
card) to find out the elapsed time between periods is correct or not
- return (bytes_to_frames(substream->runtime, current_ptr));
+ current_ptr = bytes_to_frames(substream->runtime, current_ptr);
+ if (current_ptr >= substream->runtime->buffer_size) {
+ dev_info(vortex->card->dev, "ptr : %x. time : %x/n", current_ptr,
hwread(vortex->mmio, VORTEX_SMP_TIME ));
+ current_ptr = 0;
+ }
+ return current_ptr;
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https://bugs.launchpad.net/bugs/1551041
Title:
snd_au8820 0000:01:04.0: BUG: , pos = 16386, buffer size = 16384,
period size = 1024
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