From c3b3d479788fcea7e543f29acf83c85b8b148fbe Mon Sep 17 00:00:00 2001
From: Alan Hourihane <alanh@tungstengraphics.com>
Date: Tue, 8 Aug 2006 15:28:14 -0700
Subject: Intel bug #35: Fix accelerator syncing with DGA.

Fixes glitches seen with Mark Vojkovich's "texture" demo.
---
 src/i830_dga.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

(limited to 'src/i830_dga.c')

diff --git a/src/i830_dga.c b/src/i830_dga.c
index 1129fa31..1a6e4e69 100644
--- a/src/i830_dga.c
+++ b/src/i830_dga.c
@@ -253,12 +253,25 @@ static void
 I830_Sync(ScrnInfoPtr pScrn)
 {
    I830Ptr pI830 = I830PTR(pScrn);
+   int flags = MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE;
 
    MARKER();
 
-   if (pI830->AccelInfoRec) {
-      (*pI830->AccelInfoRec->Sync) (pScrn);
-   }
+   if (pI830->noAccel) 
+      return;
+
+   if (IS_I965G(pI830))
+      flags = 0;
+
+   BEGIN_LP_RING(2);
+   OUT_RING(MI_FLUSH | flags);
+   OUT_RING(MI_NOOP);		/* pad to quadword */
+   ADVANCE_LP_RING();
+
+   I830WaitLpRing(pScrn, pI830->LpRing->mem.Size - 8, 0);
+
+   pI830->LpRing->space = pI830->LpRing->mem.Size - 8;
+   pI830->nextColorExpandBuf = 0;
 }
 
 static void
-- 
cgit v1.2.3