Mesa (master): i965: Add WARN_ONCE for depthstencil workarounds we shouldn' t be hitting.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: e63c959451dcdc42fc23b6b4c0871701abbaf23c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e63c959451dcdc42fc23b6b4c0871701abbaf23c

Author: Eric Anholt <eric at anholt.net>
Date:   Tue Feb 26 11:35:40 2013 -0800

i965: Add WARN_ONCE for depthstencil workarounds we shouldn't be hitting.

Reviewed-by: Chad Versace <chad.versace at linux.intel.com>

---

 src/mesa/drivers/dri/i965/gen6_blorp.cpp |    3 +++
 src/mesa/drivers/dri/i965/gen7_blorp.cpp |    3 +++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/gen6_blorp.cpp b/src/mesa/drivers/dri/i965/gen6_blorp.cpp
index 3834ae2..2b6db82 100644
--- a/src/mesa/drivers/dri/i965/gen6_blorp.cpp
+++ b/src/mesa/drivers/dri/i965/gen6_blorp.cpp
@@ -855,6 +855,9 @@ gen6_blorp_emit_depth_stencil_config(struct brw_context *brw,
        * tile_x and tile_y to 0.  This is a temporary workaround until we come
        * up with a better solution.
        */
+      WARN_ONCE((tile_x & 7) || (tile_y & 7),
+                "Depth/stencil buffer needs alignment to 8-pixel boundaries.\n"
+                "Truncating offset, bad rendering may occur.\n");
       tile_x &= ~7;
       tile_y &= ~7;
 
diff --git a/src/mesa/drivers/dri/i965/gen7_blorp.cpp b/src/mesa/drivers/dri/i965/gen7_blorp.cpp
index 21caa0a..b6719b7 100644
--- a/src/mesa/drivers/dri/i965/gen7_blorp.cpp
+++ b/src/mesa/drivers/dri/i965/gen7_blorp.cpp
@@ -612,6 +612,9 @@ gen7_blorp_emit_depth_stencil_config(struct brw_context *brw,
        * tile_x and tile_y to 0.  This is a temporary workaround until we come
        * up with a better solution.
        */
+      WARN_ONCE((tile_x & 7) || (tile_y & 7),
+                "Depth/stencil buffer needs alignment to 8-pixel boundaries.\n"
+                "Truncating offset, bad rendering may occur.\n");
       tile_x &= ~7;
       tile_y &= ~7;