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isl/state: Emit no-op mip tail setup on SKL

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This hasn't ever been a problem in the past but it is recommended by the
hardware docs.

Reviewed-by: Chad Versace <chad.versace@intel.com>
Cc: "12.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 96706bad5f)
This commit is contained in:
Jason Ekstrand 2016-06-06 18:22:21 -07:00 • committed by Emil Velikov
parent a49f97fae3
commit 913e9e14f0
1 changed files with 8 additions and 0 deletions
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8
src/intel/isl/isl_surface_state.c
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@ -292,6 +292,14 @@ isl_genX(surf_fill_state_s)(const struct isl_device *dev, void *state,
s.MIPCountLOD = MAX(info->view->levels, 1) - 1;
}
#if GEN_GEN >= 9
/* We don't use miptails yet. The PRM recommends that you set "Mip Tail
* Start LOD" to 15 to prevent the hardware from trying to use them.
*/
s.TiledResourceMode = NONE;
s.MipTailStartLOD = 15;
#endif
const struct isl_extent3d image_align = get_image_alignment(info->surf);
s.SurfaceVerticalAlignment = isl_to_gen_valign[image_align.height];
s.SurfaceHorizontalAlignment = isl_to_gen_halign[image_align.width];