https://bugs.freedesktop.org/show_bug.cgi?id=91509
--- Comment #6 from Michel Dänzer michel@daenzer.net --- FWIW, the (micro-)tile size is always 8x8. With macro-tiling (called 2D tiling with current GPUs) enabled, the pitch (and height, for calculating the memory allocation size) must usually be aligned to a macro-tile boundary. Not sure offhand how to calculate the macro-tile size on those old GPUs though.