https://bugs.freedesktop.org/show_bug.cgi?id=69675
--- Comment #14 from Pierre Ossman pierre-bugzilla@ossman.eu --- (In reply to comment #3)
Created attachment 86598 [details] [review] use hw generated cts and n values rather than the sw programmed values
Does this patch help? If not, it may be worth adding some slop to the r600_hdmi_predefined_acr[] table to handle rounding differences so the appropriate defined values get selected.
A quick test indicates that this patch does indeed solve the issue. I've played three minutes of AC3 audio without any interruptions.