(In reply to comment #31)
> As send via E-Mail, I told the same with 24.0 and 24p having these issues.
> The "sw cts/n values" patch made audio drops with 50 / 60hz much better -
> but I also have to admit: 
> 
> Reverting the "sw cts/n values" patch makes 24p working flawless again.
> 
> 
> If it is not too late for 3.12 perhaps reverting the "sw cts/n values" patch
> would be an option?

Are you sure it was flawless?  You had said you needed this patch:
http://lists.freedesktop.org/archives/dri-devel/2013-October/047585.html
to fix the audio playback in addition to using hw cts/n.  That patch broke
playback for a number of other users.  So it doesn't seem to be completely
fixed in either case.