Add xf86CrtcScreenInit to share initialization across drivers.

xf86CrtcScreenInit performs initialization that needs to happen at
ScreenInit time.
(cherry picked from commit 558a4f5588ad2ec11254e0b5d6ce9515b137369e)

hw/xfree86/modes/xf86Crtc.c

@@ -545,6 +545,60 @@ xf86OutputDestroy (xf86OutputPtr output)
     xfree (output);
 }
 
+/*
+ * Called during CreateScreenResources to hook up RandR
+ */
+static Bool
+xf86CrtcCreateScreenResources (ScreenPtr screen)
+{
+    ScrnInfoPtr		scrn = xf86Screens[screen->myNum];
+    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
+
+    screen->CreateScreenResources = config->CreateScreenResources;
+    
+    if (!(*screen->CreateScreenResources)(screen))
+	return FALSE;
+
+    if (!xf86RandR12CreateScreenResources (screen))
+	return FALSE;
+
+    return TRUE;
+}
+
+/*
+ * Called at ScreenInit time to set up
+ */
+Bool
+xf86CrtcScreenInit (ScreenPtr screen)
+{
+    ScrnInfoPtr		scrn = xf86Screens[screen->myNum];
+    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
+    int			c;
+
+    /* Rotation */
+    xf86DrvMsg(scrn->scrnIndex, X_INFO, "RandR 1.2 enabled, ignore the following RandR disabled message.\n");
+    xf86DisableRandR(); /* Disable old RandR extension support */
+    xf86RandR12Init (screen);
+
+    /* support all rotations if every crtc has the shadow alloc funcs */
+    for (c = 0; c < config->num_crtc; c++)
+    {
+	xf86CrtcPtr crtc = config->crtc[c];
+	if (!crtc->funcs->shadow_allocate || !crtc->funcs->shadow_create)
+	    break;
+    }
+    if (c == config->num_crtc)
+	xf86RandR12SetRotations (screen, RR_Rotate_0 | RR_Rotate_90 |
+				 RR_Rotate_180 | RR_Rotate_270);
+    else
+	xf86RandR12SetRotations (screen, RR_Rotate_0);
+    
+    /* Wrap CreateScreenResources so we can initialize the RandR code */
+    config->CreateScreenResources = screen->CreateScreenResources;
+    screen->CreateScreenResources = xf86CrtcCreateScreenResources;
+    return TRUE;
+}
+
 static DisplayModePtr
 xf86DefaultMode (xf86OutputPtr output, int width, int height)
 {

hw/xfree86/modes/xf86Crtc.h

@@ -494,6 +494,7 @@ typedef struct _xf86CrtcConfig {
 
     const xf86CrtcConfigFuncsRec *funcs;
 
+    CreateScreenResourcesProcPtr    CreateScreenResources;
 } xf86CrtcConfigRec, *xf86CrtcConfigPtr;
 
 extern int xf86CrtcConfigPrivateIndex;
@@ -524,25 +525,6 @@ void
 xf86CrtcDestroy (xf86CrtcPtr		crtc);
 
 
-/**
- * Allocate a crtc for the specified output
- *
- * Find a currently unused CRTC which is suitable for
- * the specified output
- */
-
-xf86CrtcPtr 
-xf86AllocCrtc (xf86OutputPtr		output);
-
-/**
- * Free a crtc
- *
- * Mark the crtc as unused by any outputs
- */
-
-void
-xf86FreeCrtc (xf86CrtcPtr		crtc);
-
 /**
  * Sets the given video mode on the given crtc
  */
@@ -582,6 +564,9 @@ xf86ProbeOutputModes (ScrnInfoPtr pScrn, int maxX, int maxY);
 void
 xf86SetScrnInfoModes (ScrnInfoPtr pScrn);
 
+Bool
+xf86CrtcScreenInit (ScreenPtr pScreen);
+
 Bool
 xf86InitialConfiguration (ScrnInfoPtr pScrn, Bool canGrow);
 

hw/xfree86/modes/xf86Rename.h

@@ -31,6 +31,7 @@
 #define xf86CrtcDestroy XF86NAME(xf86CrtcDestroy)
 #define xf86CrtcInUse XF86NAME(xf86CrtcInUse)
 #define xf86CrtcRotate XF86NAME(xf86CrtcRotate)
+#define xf86CrtcScreenInit XF86NAME(xf86CrtcScreenInit)
 #define xf86CrtcSetMode XF86NAME(xf86CrtcSetMode)
 #define xf86CrtcSetSizeRange XF86NAME(xf86CrtcSetSizeRange)
 #define xf86CVTMode XF86NAME(xf86CVTMode)