RandR: config time updates when hardware config changes.

The config time in the RandR protocol reflects when the hardware state has
changed. It was getting changed anytime the driver changed the usage
of the hardware as well.
(cherry picked from 98d18a6578130adb411ca4bcc776fcb7e07f189f commit)

randr/randr.c

@@ -415,7 +415,11 @@ RRTellChanged (ScreenPtr pScreen)
     if (pScrPriv->changed)
     {
 	UpdateCurrentTime ();
-	pScrPriv->lastConfigTime = currentTime;
+	if (pScrPriv->configChanged)
+	{
+	    pScrPriv->lastConfigTime = currentTime;
+	    pScrPriv->configChanged = FALSE;
+	}
 	pScrPriv->changed = FALSE;
 	WalkTree (pScreen, TellChanged, (pointer) pScreen);
 	for (i = 0; i < pScrPriv->numOutputs; i++)

randr/randrstr.h

@@ -216,11 +216,14 @@ typedef struct _rrScrPriv {
     TimeStamp		    lastSetTime;	/* last changed by client */
     TimeStamp		    lastConfigTime;	/* possible configs changed */
     RRCloseScreenProcPtr    CloseScreen;
+
     Bool		    changed;		/* some config changed */
+    Bool		    configChanged;	/* configuration changed */
+    Bool		    layoutChanged;	/* screen layout changed */
+
     CARD16		    minWidth, minHeight;
     CARD16		    maxWidth, maxHeight;
     CARD16		    width, height;	/* last known screen size */
-    Bool		    layoutChanged;	/* screen layout changed */
 
     int			    numOutputs;
     RROutputPtr		    *outputs;
@@ -619,10 +622,13 @@ ProcRRDeleteOutputMode (ClientPtr client);
 /* rroutput.c */
 
 /*
- * Notify the output of some change
+ * Notify the output of some change. configChanged indicates whether
+ * any external configuration (mode list, clones, connected status)
+ * has changed, or whether the change was strictly internal
+ * (which crtc is in use)
  */
 void
-RROutputChanged (RROutputPtr output);
+RROutputChanged (RROutputPtr output, Bool configChanged);
 
 /*
  * Create an output

randr/rrcrtc.c

@@ -136,7 +136,7 @@ RRCrtcNotify (RRCrtcPtr	    crtc,
 		break;
 	if (j == crtc->numOutputs)
 	{
-	    RROutputChanged (outputs[i]);
+	    RROutputChanged (outputs[i], FALSE);
 	    RRCrtcChanged (crtc, FALSE);
 	}
     }
@@ -151,7 +151,7 @@ RRCrtcNotify (RRCrtcPtr	    crtc,
 		break;
 	if (i == numOutputs)
 	{
-	    RROutputChanged (crtc->outputs[j]);
+	    RROutputChanged (crtc->outputs[j], FALSE);
 	    RRCrtcChanged (crtc, FALSE);
 	}
     }

randr/rrinfo.c

@@ -69,6 +69,7 @@ RROldModeAdd (RROutputPtr output, RRScreenSizePtr size, int refresh)
     output->modes = modes;
     output->changed = TRUE;
     pScrPriv->changed = TRUE;
+    pScrPriv->configChanged = TRUE;
     return mode;
 }
 
@@ -205,6 +206,7 @@ RRGetInfo (ScreenPtr pScreen)
     
     rotations = 0;
     pScrPriv->changed = FALSE;
+    pScrPriv->configChanged = FALSE;
     
     if (!(*pScrPriv->rrGetInfo) (pScreen, &rotations))
 	return FALSE;

randr/rroutput.c

@@ -28,7 +28,7 @@ RESTYPE	RROutputType;
  * Notify the output of some change
  */
 void
-RROutputChanged (RROutputPtr output)
+RROutputChanged (RROutputPtr output, Bool configChanged)
 {
     ScreenPtr	pScreen = output->pScreen;
     
@@ -37,6 +37,8 @@ RROutputChanged (RROutputPtr output)
     {
 	rrScrPriv (pScreen);
 	pScrPriv->changed = TRUE;
+	if (configChanged)
+	    pScrPriv->configChanged = TRUE;
     }
 }
 
@@ -106,7 +108,7 @@ RROutputAttachScreen (RROutputPtr output, ScreenPtr pScreen)
     output->pScreen = pScreen;
     pScrPriv->outputs = outputs;
     pScrPriv->outputs[pScrPriv->numOutputs++] = output;
-    RROutputChanged (output);
+    RROutputChanged (output, FALSE);
     return TRUE;
 }
 		      
@@ -142,7 +144,7 @@ RROutputSetClones (RROutputPtr  output,
     memcpy (newClones, clones, numClones * sizeof (RROutputPtr));
     output->clones = newClones;
     output->numClones = numClones;
-    RROutputChanged (output);
+    RROutputChanged (output, TRUE);
     return TRUE;
 }
 
@@ -186,7 +188,7 @@ RROutputSetModes (RROutputPtr	output,
     output->modes = newModes;
     output->numModes = numModes;
     output->numPreferred = numPreferred;
-    RROutputChanged (output);
+    RROutputChanged (output, TRUE);
     return TRUE;
 }
 
@@ -219,7 +221,7 @@ RROutputSetCrtcs (RROutputPtr	output,
     memcpy (newCrtcs, crtcs, numCrtcs * sizeof (RRCrtcPtr));
     output->crtcs = newCrtcs;
     output->numCrtcs = numCrtcs;
-    RROutputChanged (output);
+    RROutputChanged (output, TRUE);
     return TRUE;
 }
 
@@ -229,7 +231,7 @@ RROutputSetCrtc (RROutputPtr output, RRCrtcPtr crtc)
     if (output->crtc == crtc)
 	return;
     output->crtc = crtc;
-    RROutputChanged (output);
+    RROutputChanged (output, FALSE);
 }
 
 Bool
@@ -239,7 +241,7 @@ RROutputSetConnection (RROutputPtr  output,
     if (output->connection == connection)
 	return TRUE;
     output->connection = connection;
-    RROutputChanged (output);
+    RROutputChanged (output, TRUE);
     return TRUE;
 }
 
@@ -251,7 +253,7 @@ RROutputSetSubpixelOrder (RROutputPtr output,
 	return TRUE;
 
     output->subpixelOrder = subpixelOrder;
-    RROutputChanged (output);
+    RROutputChanged (output, FALSE);
     return TRUE;
 }
 
@@ -264,7 +266,7 @@ RROutputSetPhysicalSize (RROutputPtr	output,
 	return TRUE;
     output->mmWidth = mmWidth;
     output->mmHeight = mmHeight;
-    RROutputChanged (output);
+    RROutputChanged (output, FALSE);
     return TRUE;
 }