Mesa (master): i965/gen6: Set up layer constraints properly for depth buffers.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 6be024f44dea7df6608e5a3111deffc61dbf6d6d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6be024f44dea7df6608e5a3111deffc61dbf6d6d

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Thu Jun 25 09:17:38 2015 -0700

i965/gen6: Set up layer constraints properly for depth buffers.

This ports over Chris Forbes' equivalent fixes in gen7_misc_state.c
from commit 77d55ef4819436ebbf9786a1e720ec00707bbb19.

No Piglit changes on Sandybridge.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen at intel.com>

---

 src/mesa/drivers/dri/i965/gen6_depth_state.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/gen6_depth_state.c b/src/mesa/drivers/dri/i965/gen6_depth_state.c
index 8f0d7dc..febd478 100644
--- a/src/mesa/drivers/dri/i965/gen6_depth_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_depth_state.c
@@ -73,7 +73,7 @@ gen6_emit_depth_stencil_hiz(struct brw_context *brw,
    rb = (struct gl_renderbuffer*) irb;
 
    if (rb) {
-      depth = MAX2(rb->Depth, 1);
+      depth = MAX2(irb->layer_count, 1);
       if (rb->TexImage)
          gl_target = rb->TexImage->TexObject->Target;
    }
@@ -89,6 +89,10 @@ gen6_emit_depth_stencil_hiz(struct brw_context *brw,
       surftype = BRW_SURFACE_2D;
       depth *= 6;
       break;
+   case GL_TEXTURE_3D:
+      assert(mt);
+      depth = MAX2(mt->logical_depth0, 1);
+      /* fallthrough */
    default:
       surftype = translate_tex_target(gl_target);
       break;