(unsigned long)new_hw_ptr,
(unsigned long)runtime->hw_ptr_base);
}
+
+ if (runtime->no_period_wakeup) {
+ /*
+ * Without regular period interrupts, we have to check
+ * the elapsed time to detect xruns.
+ */
+ jdelta = jiffies - runtime->hw_ptr_jiffies;
+ if (jdelta < runtime->hw_ptr_buffer_jiffies / 2)
+ goto no_delta_check;
+ hdelta = jdelta - delta * HZ / runtime->rate;
+ while (hdelta > runtime->hw_ptr_buffer_jiffies / 2 + 1) {
+ delta += runtime->buffer_size;
+ hw_base += runtime->buffer_size;
+ if (hw_base >= runtime->boundary)
+ hw_base = 0;
+ new_hw_ptr = hw_base + pos;
+ hdelta -= runtime->hw_ptr_buffer_jiffies;
+ }
+ goto no_delta_check;
+ }
+
/* something must be really wrong */
if (delta >= runtime->buffer_size + runtime->period_size) {
hw_ptr_error(substream,
(long)old_hw_ptr);
}
+ no_delta_check:
if (runtime->status->hw_ptr == new_hw_ptr)
return 0;