Don't map the front buffer in libdri if the ddx driver doesn't set the size.

This lets drivers map the front buffer themselves
by setting dontMapFramebuffer.

hw/xfree86/dri/dri.c

@@ -311,6 +311,8 @@ DRIScreenInit(ScreenPtr pScreen, DRIInfoPtr pDRIInfo, int *pDRMFD)
     Bool                xineramaInCore = FALSE;
     DRIEntPrivPtr       pDRIEntPriv;
     ScrnInfoPtr         pScrn = xf86Screens[pScreen->myNum];
+    DRIContextFlags	flags    = 0;
+    DRIContextPrivPtr	pDRIContextPriv;
 
     /* If the DRI extension is disabled, do not initialize the DRI */
     if (noXFree86DRIExtension) {
@@ -416,23 +418,29 @@ DRIScreenInit(ScreenPtr pScreen, DRIInfoPtr pDRIInfo, int *pDRMFD)
     pDRIPriv->hLSAREA = pDRIEntPriv->hLSAREA;
     pDRIPriv->pLSAREA = pDRIEntPriv->pLSAREA;
 
-    if (drmAddMap( pDRIPriv->drmFD,
+    if (!pDRIPriv->pDriverInfo->dontMapFrameBuffer)
-		   (drm_handle_t)pDRIPriv->pDriverInfo->frameBufferPhysicalAddress,
-		   pDRIPriv->pDriverInfo->frameBufferSize,
-		   DRM_FRAME_BUFFER,
-		   0,
-		   &pDRIPriv->hFrameBuffer) < 0)
     {
-	pDRIPriv->directRenderingSupport = FALSE;
+	if (drmAddMap( pDRIPriv->drmFD,
-	pScreen->devPrivates[DRIScreenPrivIndex].ptr = NULL;
+		       (drm_handle_t)pDRIPriv->pDriverInfo->frameBufferPhysicalAddress,
-	drmUnmap(pDRIPriv->pSAREA, pDRIPriv->pDriverInfo->SAREASize);
+		       pDRIPriv->pDriverInfo->frameBufferSize,
-	drmClose(pDRIPriv->drmFD);
+		       DRM_FRAME_BUFFER,
-        DRIDrvMsg(pScreen->myNum, X_INFO,
+		       0,
-                  "[drm] drmAddMap failed\n");
+		       &pDRIPriv->pDriverInfo->hFrameBuffer) < 0)
-	return FALSE;
+	    {
+		pDRIPriv->directRenderingSupport = FALSE;
+		pScreen->devPrivates[DRIScreenPrivIndex].ptr = NULL;
+		drmUnmap(pDRIPriv->pSAREA, pDRIPriv->pDriverInfo->SAREASize);
+		drmClose(pDRIPriv->drmFD);
+		DRIDrvMsg(pScreen->myNum, X_INFO,
+			  "[drm] drmAddMap failed\n");
+		return FALSE;
+	    }
+	DRIDrvMsg(pScreen->myNum, X_INFO, "[drm] framebuffer handle = %p\n",
+		  pDRIPriv->pDriverInfo->hFrameBuffer);
+    } else {
+	DRIDrvMsg(pScreen->myNum, X_INFO,
+		  "[drm] framebuffer mapped by ddx driver\n");
     }
-    DRIDrvMsg(pScreen->myNum, X_INFO, "[drm] framebuffer handle = %p\n",
-	      pDRIPriv->hFrameBuffer);
 
     if (pDRIEntPriv->resOwner == NULL) {
 	pDRIEntPriv->resOwner = pScreen;
@@ -479,21 +487,14 @@ DRIScreenInit(ScreenPtr pScreen, DRIInfoPtr pDRIInfo, int *pDRMFD)
 
     pDRIEntPriv->refCount++;
 
-    return TRUE;
+    /* Set up flags for DRICreateContextPriv */
-}
-
-Bool
-DRIFinishScreenInit(ScreenPtr pScreen)
-{
-    DRIScreenPrivPtr  pDRIPriv = DRI_SCREEN_PRIV(pScreen);
-    DRIInfoPtr        pDRIInfo = pDRIPriv->pDriverInfo;
-    DRIContextFlags   flags    = 0;
-    DRIContextPrivPtr pDRIContextPriv;
-
-				/* Set up flags for DRICreateContextPriv */
     switch (pDRIInfo->driverSwapMethod) {
-    case DRI_KERNEL_SWAP:    flags = DRI_CONTEXT_2DONLY;    break;
+    case DRI_KERNEL_SWAP:
-    case DRI_HIDE_X_CONTEXT: flags = DRI_CONTEXT_PRESERVED; break;
+	flags = DRI_CONTEXT_2DONLY;
+	break;
+    case DRI_HIDE_X_CONTEXT:
+	flags = DRI_CONTEXT_PRESERVED;
+	break;
     }
 
     if (!(pDRIContextPriv = DRICreateContextPriv(pScreen,
@@ -580,6 +581,15 @@ DRIFinishScreenInit(ScreenPtr pScreen)
 	break;
     }
 
+    return TRUE;
+}
+
+Bool
+DRIFinishScreenInit(ScreenPtr pScreen)
+{
+    DRIScreenPrivPtr  pDRIPriv = DRI_SCREEN_PRIV(pScreen);
+    DRIInfoPtr        pDRIInfo = pDRIPriv->pDriverInfo;
+
     /* Wrap DRI support */
     if (pDRIInfo->wrap.ValidateTree) {
 	pDRIPriv->wrap.ValidateTree     = pScreen->ValidateTree;
@@ -1592,7 +1602,7 @@ DRIGetDeviceInfo(ScreenPtr pScreen,
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
 
-    *hFrameBuffer = pDRIPriv->hFrameBuffer;
+    *hFrameBuffer = pDRIPriv->pDriverInfo->hFrameBuffer;
     *fbOrigin = 0;
     *fbSize = pDRIPriv->pDriverInfo->frameBufferSize;
     *fbStride = pDRIPriv->pDriverInfo->frameBufferStride;

hw/xfree86/dri/dri.h

@@ -107,7 +107,7 @@ typedef struct {
  */
 
 #define DRIINFO_MAJOR_VERSION   5
-#define DRIINFO_MINOR_VERSION   3
+#define DRIINFO_MINOR_VERSION   4
 #define DRIINFO_PATCH_VERSION   0
 
 typedef unsigned long long (*DRITexOffsetStartProcPtr)(PixmapPtr pPix);
@@ -187,6 +187,12 @@ typedef struct {
     /* New with DRI version 5.3.0 */
     DRITexOffsetStartProcPtr  texOffsetStart;
     DRITexOffsetFinishProcPtr texOffsetFinish;
+
+    /* New with DRI version 5.4.0 */
+    int			dontMapFrameBuffer;
+    drm_handle_t   	hFrameBuffer; /* Handle to framebuffer, either
+				       * mapped by DDX driver or DRI */
+    
 } DRIInfoRec, *DRIInfoPtr;
 
 

hw/xfree86/dri/dristruct.h

@@ -85,7 +85,6 @@ typedef struct _DRIScreenPrivRec
     int			drmFD;	      /* File descriptor for /dev/video/?   */
     drm_handle_t   	hSAREA;	      /* Handle to SAREA, for mapping       */
     XF86DRISAREAPtr	pSAREA;	      /* Mapped pointer to SAREA            */
-    drm_handle_t   	hFrameBuffer; /* Handle to framebuffer, for mapping */
     drm_context_t          myContext;    /* DDX Driver's context               */
     DRIContextPrivPtr   myContextPriv;/* Pointer to server's private area   */
     DRIContextPrivPtr   lastPartial3DContext;  /* last one partially saved  */