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i965/skl: Use more compact hiz dimensions

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gen8 had some special restrictions which don't seem to carry over to gen9.
Quoting the spec for SKL:
"The Z_Height and Z_Width values must equal those present in
3DSTATE_DEPTH_BUFFER incremented by one."

This fixes nothing in piglit (and regresses nothing).

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Ben Widawsky 2015-06-24 20:07:54 -07:00
parent 101a73846b
commit c1151b18f2
1 changed files with 17 additions and 15 deletions
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32
src/mesa/drivers/dri/i965/intel_mipmap_tree.c
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@ -1456,21 +1456,23 @@ intel_gen7_hiz_buf_create(struct brw_context *brw,
/* Gen7 PRM Volume 2, Part 1, 11.5.3 "Hierarchical Depth Buffer" documents
* adjustments required for Z_Height and Z_Width based on multisampling.
*/
switch (mt->num_samples) {
case 0:
case 1:
break;
case 2:
case 4:
z_width *= 2;
z_height *= 2;
break;
case 8:
z_width *= 4;
z_height *= 2;
break;
default:
unreachable("unsupported sample count");
if (brw->gen < 9) {
switch (mt->num_samples) {
case 0:
case 1:
break;
case 2:
case 4:
z_width *= 2;
z_height *= 2;
break;
case 8:
z_width *= 4;
z_height *= 2;
break;
default:
unreachable("unsupported sample count");
}
}
const unsigned vertical_align = 8; /* 'j' in the docs */