Ubuntu
alsa-driver package

  1. Bug #1551041
  2. Comment #68

Comment 68 for bug 1551041

Revision history for this message
Raymond (superquad-vortex2) wrote :

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;