From 955f2b89f94aaa20b5eafd045b01e3eeef3d29ad Mon Sep 17 00:00:00 2001
From: Kevin E Martin <kem@kem.org>
Date: Thu, 12 Aug 2004 05:00:22 +0000
Subject: Fix context switching on Radeons and build problem when XF86DRI is
 not     defined (Bug #922, Eric Anholt).

---
 src/radeon.h        |  2 +-
 src/radeon_accel.c  |  7 +++----
 src/radeon_dri.c    |  8 ++++++++
 src/radeon_render.c | 36 ++++++++++++++++++++++++------------
 4 files changed, 36 insertions(+), 17 deletions(-)

diff --git a/src/radeon.h b/src/radeon.h
index 1918d898..523d2b72 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -553,6 +553,7 @@ typedef struct {
 
 				/* Render */
     Bool              RenderAccel;
+    Bool              RenderInited3D;
     FBLinearPtr       RenderTex;
     void              (*RenderCallback)(ScrnInfoPtr);
     Time              RenderTimeout;
@@ -626,7 +627,6 @@ extern void        RADEONSelectBuffer(ScrnInfoPtr pScrn, int buffer);
 
 extern Bool        RADEONAccelInit(ScreenPtr pScreen);
 extern void        RADEONAccelInitMMIO(ScreenPtr pScreen, XAAInfoRecPtr a);
-extern void        RADEONInit3DEngineForRender(ScrnInfoPtr pScrn);
 extern void        RADEONEngineInit(ScrnInfoPtr pScrn);
 extern Bool        RADEONCursorInit(ScreenPtr pScreen);
 extern Bool        RADEONDGAInit(ScreenPtr pScreen);
diff --git a/src/radeon_accel.c b/src/radeon_accel.c
index 0799033f..62ce8794 100644
--- a/src/radeon_accel.c
+++ b/src/radeon_accel.c
@@ -313,12 +313,11 @@ void RADEONEngineRestore(ScrnInfoPtr pScrn)
     OUTREG(RADEON_DP_SRC_BKGD_CLR,   0x00000000);
     OUTREG(RADEON_DP_WRITE_MASK,     0xffffffff);
 
+    RADEONWaitForIdleMMIO(pScrn);
+
 #ifdef RENDER
-    if (info->RenderAccel)
-        RADEONInit3DEngineForRender(pScrn);
+    info->RenderInited3D = FALSE;
 #endif
-
-    RADEONWaitForIdleMMIO(pScrn);
 }
 
 /* Initialize the acceleration hardware */
diff --git a/src/radeon_dri.c b/src/radeon_dri.c
index f585ca27..c32ab18c 100644
--- a/src/radeon_dri.c
+++ b/src/radeon_dri.c
@@ -343,9 +343,17 @@ static void RADEONEnterServer(ScreenPtr pScreen)
 {
     ScrnInfoPtr    pScrn = xf86Screens[pScreen->myNum];
     RADEONInfoPtr  info  = RADEONPTR(pScrn);
+#ifdef RENDER
+    RADEONSAREAPrivPtr pSAREAPriv;
+#endif
 
     if (info->accel) info->accel->NeedToSync = TRUE;
 
+#ifdef RENDER
+    pSAREAPriv = DRIGetSAREAPrivate(pScrn->pScreen);
+    if (pSAREAPriv->ctxOwner != DRIGetContext(pScrn->pScreen))
+	info->RenderInited3D = FALSE;
+#endif
 }
 
 /* Called when the X server goes to sleep to allow the X server's
diff --git a/src/radeon_render.c b/src/radeon_render.c
index 073ca665..e0803716 100644
--- a/src/radeon_render.c
+++ b/src/radeon_render.c
@@ -225,16 +225,22 @@ ATILog2(int val)
 	return bits - 1;
 }
 
-void RADEONInit3DEngineForRender(ScrnInfoPtr pScrn)
+static void RadeonInit3DEngine(ScrnInfoPtr pScrn)
 {
-#ifdef XF86DRI
     RADEONInfoPtr info = RADEONPTR (pScrn);
 
-    if (info->CPStarted)
+#ifdef XF86DRI
+    if (info->directRenderingEnabled) {
+	RADEONSAREAPrivPtr pSAREAPriv;
+
+	pSAREAPriv = DRIGetSAREAPrivate(pScrn->pScreen);
+	pSAREAPriv->ctxOwner = DRIGetContext(pScrn->pScreen);
 	RadeonInit3DEngineCP(pScrn);
-    else
+    } else
 #endif
 	RadeonInit3DEngineMMIO(pScrn);
+
+    info->RenderInited3D = TRUE;
 }
 
 static void
@@ -433,11 +439,8 @@ static Bool FUNC_NAME(R100SetupTexture)(
     i = height;
     dst = (CARD8*)(info->FB + offset);
 
-    if (info->accel->NeedToSync) {
+    if (info->accel->NeedToSync)
 	info->accel->Sync(pScrn);
-	if (info->CPStarted)
-	    RADEONInit3DEngineForRender(pScrn);
-    }
 
     while(i--) {
 	memcpy(dst, src, width * tex_bytepp);
@@ -490,6 +493,9 @@ FUNC_NAME(R100SetupForCPUToScreenAlphaTexture) (
     if (blend_cntl == 0)
 	return FALSE;
 
+    if (!info->RenderInited3D)
+	RadeonInit3DEngine(pScrn);
+
     if (!FUNC_NAME(R100SetupTexture)(pScrn, maskFormat, alphaPtr, alphaPitch,
 				     width, height, flags))
 	return FALSE;
@@ -539,6 +545,9 @@ FUNC_NAME(R100SetupForCPUToScreenTexture) (
     if (blend_cntl == 0)
 	return FALSE;
     
+    if (!info->RenderInited3D)
+	RadeonInit3DEngine(pScrn);
+
     if (!FUNC_NAME(R100SetupTexture)(pScrn, srcFormat, texPtr, texPitch, width,
 				     height, flags))
 	return FALSE;
@@ -741,11 +750,8 @@ static Bool FUNC_NAME(R200SetupTexture)(
     /* Upload texture to card.  Should use ImageWrite to avoid syncing. */
     i = height;
     dst = (CARD8*)(info->FB + offset);
-    if (info->accel->NeedToSync) {
+    if (info->accel->NeedToSync)
 	info->accel->Sync(pScrn);
-	if (info->CPStarted)
-	    RADEONInit3DEngineForRender(pScrn);
-    }
 
     while(i--) {
 	memcpy(dst, src, width * tex_bytepp);
@@ -799,6 +805,9 @@ FUNC_NAME(R200SetupForCPUToScreenAlphaTexture) (
     if (blend_cntl == 0)
 	return FALSE;
 
+    if (!info->RenderInited3D)
+	RadeonInit3DEngine(pScrn);
+
     if (!FUNC_NAME(R200SetupTexture)(pScrn, maskFormat, alphaPtr, alphaPitch,
 				     width, height, flags))
 	return FALSE;
@@ -849,6 +858,9 @@ FUNC_NAME(R200SetupForCPUToScreenTexture) (
     if (blend_cntl == 0)
 	return FALSE;
 
+    if (!info->RenderInited3D)
+	RadeonInit3DEngine(pScrn);
+
     if (!FUNC_NAME(R200SetupTexture)(pScrn, srcFormat, texPtr, texPitch, width,
 				     height, flags))
 	return FALSE;
-- 
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