From: Kenneth Graunke <kenneth@whitecape.org>
Date: Mon, 6 Jun 2011 17:35:58 +0000 (-0700)
Subject: i965/gen7: Don't emit 3DSTATE_GS_SVB_INDEX on Ivybridge.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2a638076165eaa1294708a7e4518c2d72560e066;p=mesa.git

i965/gen7: Don't emit 3DSTATE_GS_SVB_INDEX on Ivybridge.

According to vol2a.07, it only applies from Cantiga to Sandybridge.

I found this in my ringbuffers while investigating various GPU hangs.
While it may not have been the cause, it seemed wise to remove it.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
---

diff --git a/src/mesa/drivers/dri/i965/brw_misc_state.c b/src/mesa/drivers/dri/i965/brw_misc_state.c
index 4256234a645..a6de28b3add 100644
--- a/src/mesa/drivers/dri/i965/brw_misc_state.c
+++ b/src/mesa/drivers/dri/i965/brw_misc_state.c
@@ -606,13 +606,15 @@ static void upload_invarient_state( struct brw_context *brw )
       OUT_BATCH(1);
       ADVANCE_BATCH();
 
-      for (i = 0; i < 4; i++) {
-	 BEGIN_BATCH(4);
-	 OUT_BATCH(_3DSTATE_GS_SVB_INDEX << 16 | (4 - 2));
-	 OUT_BATCH(i << SVB_INDEX_SHIFT);
-	 OUT_BATCH(0);
-	 OUT_BATCH(0xffffffff);
-	 ADVANCE_BATCH();
+      if (intel->gen < 7) {
+	 for (i = 0; i < 4; i++) {
+	    BEGIN_BATCH(4);
+	    OUT_BATCH(_3DSTATE_GS_SVB_INDEX << 16 | (4 - 2));
+	    OUT_BATCH(i << SVB_INDEX_SHIFT);
+	    OUT_BATCH(0);
+	    OUT_BATCH(0xffffffff);
+	    ADVANCE_BATCH();
+	 }
       }
    }