On Gen9+ the 1D miptree is laid out with all of the mipmap levels in a horizontal line.
cf67ca9 i965/skl: Lay out a 1D miptree horizontally
src/mesa/drivers/dri/i965/brw_tex_layout.c | 62 +++++++++++++++++++++++++++-
1 file changed, 60 insertions(+), 2 deletions(-)
Upstream: cgit.freedesktop.org