https://bugs.freedesktop.org/show_bug.cgi?id=59672
--- Comment #5 from Alex Deucher agd5f@yahoo.com --- in attachment 73440, I don't think we want to enable fence swapping:
+#ifdef __BIG_ENDIAN + dma_cntl |= FENCE_SWAP_ENABLE; +#endif
since we already swap the fence in radeon_fence_read().