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intel: Update alignment restrictions for HiZ surfaces.

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v2 (Nanley):
* Maintain a chronological ordering for HiZ alignments. Suggested by
  Ken.

Co-authored-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jordan Justen 2018-05-29 17:10:47 -07:00 • committed by Nanley Chery
parent 6cd9731d96
commit 5d34a9975f
1 changed files with 7 additions and 1 deletions
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8
src/intel/isl/isl.c
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@ -656,11 +656,17 @@ isl_choose_image_alignment_el(const struct isl_device *dev,
if (ISL_DEV_GEN(dev) == 6) {
/* HiZ surfaces on Sandy Bridge are packed tightly. */
*image_align_el = isl_extent3d(1, 1, 1);
} else {
} else if (ISL_DEV_GEN(dev) < 12) {
/* On gen7+, HiZ surfaces are always aligned to 16x8 pixels in the
* primary surface which works out to 2x2 HiZ elments.
*/
*image_align_el = isl_extent3d(2, 2, 1);
} else {
/* On gen12+, HiZ surfaces are always aligned to 16x16 pixels in the
* primary surface which works out to 2x4 HiZ elments.
* TODO: Verify
*/
*image_align_el = isl_extent3d(2, 4, 1);
}
return;
}