48e5c246c4
In certain cases, the hardware fails to properly process a mipmap level
of these special stencil and depth formats. This happens at width=16.
This change adds a software workaround.
Modifying the corresponding mipmap nblk_x, and the other related
values, could make the tests below to work. Anyway, this method
generates regressions.
This change was tested on palm and cayman and fixes the following tests:
spec/arb_framebuffer_object/framebuffer-blit-levels read stencil: fail pass
spec/arb_depth_buffer_float/fbo-clear-formats stencil/gl_depth32f_stencil8: fail pass
Cc: mesa-stable
Signed-off-by: Patrick Lerda <patrick9876@free.fr>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31957>
(cherry picked from commit ac78692be4)
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