nv30: Fix creation of scanout buffers
Scanout buffers on nv30 must always be non-swizzled and have special width alignment constraints. These constrains have been taken from the xf86-video-nouveau src/nv_accel_common.c: nouveau_allocate_surface() function. nouveau_allocate_surface() applies these width constraints only when a tiled attribute is set, which it sets for all surfaces allocated via dri, and this "tiling" is not the same as swizzling, scanout surfaces must be linear / have a uniform_pitch or only complete garbage is shown. This commit fixes dri3 on nv30 showing a garbled display, with dri3 the scanout buffers are allocated by mesa, rather then by the ddx, and the wrong stride of these buffers was causing the garbled display. Cc: "10.6 11.0" <mesa-stable@lists.freedesktop.org> Signed-off-by:Hans de Goede <hdegoede@redhat.com> Reviewed-by:
Ilia Mirkin <imirkin@alum.mit.edu>
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