https://bugs.freedesktop.org/show_bug.cgi?id=105302
--- Comment #6 from Andrew Sheldon asheldon55@gmail.com --- (In reply to Alex Deucher from comment #5)
I'd rather not support running things out of spec in the driver. The source is open. If you want to adjust the code allow something like that you can.
Fair enough, it's simple enough to patch the source for a higher limit.