randr: some improvements, fixes and crtc abi bump

- Add active field to crtc.
- Set gamma (only) whenever a crtc becomes active.
- Check for xf86_config being NULL.
- Increase crtc abi to 3.
- A few other fixes.

hw/xfree86/modes/xf86Crtc.c

@@ -267,9 +267,11 @@ xf86CrtcSetModeTransform (xf86CrtcPtr crtc, DisplayModePtr mode, Rotation rotati
 
     crtc->enabled = xf86CrtcInUse (crtc);
 
+    /* We only hit this if someone explicitly sends a "disabled" modeset. */
     if (!crtc->enabled)
     {
-	/* XXX disable crtc? */
+	/* Check everything for stuff that should be off. */
+	xf86DisableUnusedFunctions(scrn);
 	return TRUE;
     }
 
@@ -378,6 +380,11 @@ xf86CrtcSetModeTransform (xf86CrtcPtr crtc, DisplayModePtr mode, Rotation rotati
 	    output->funcs->mode_set(output, mode, adjusted_mode);
     }
 
+    /* Only upload when needed, to avoid unneeded delays. */
+    if (!crtc->active)
+	crtc->funcs->gamma_set(crtc, crtc->gamma_red, crtc->gamma_green,
+                                            crtc->gamma_blue, crtc->gamma_size);
+
     /* Now, enable the clocks, plane, pipe, and outputs that we set up. */
     crtc->funcs->commit(crtc);
     for (i = 0; i < xf86_config->num_output; i++) 
@@ -387,8 +394,8 @@ xf86CrtcSetModeTransform (xf86CrtcPtr crtc, DisplayModePtr mode, Rotation rotati
 	    output->funcs->commit(output);
     }
 
-    /* XXX free adjustedmode */
     ret = TRUE;
+    crtc->active = TRUE;
     if (scrn->pScreen)
 	xf86CrtcSetScreenSubpixelOrder (scrn->pScreen);
 
@@ -403,6 +410,8 @@ done:
 	crtc->transformPresent = saved_transform_present;
     }
 
+    free(adjusted_mode);
+
     if (didLock)
 	crtc->funcs->unlock (crtc);
 
@@ -2265,8 +2274,7 @@ xf86CrtcSetInitialGamma(xf86CrtcPtr crtc, float gamma_red, float gamma_green,
     memcpy (crtc->gamma_blue, blue, crtc->gamma_size * sizeof (CARD16));
 
     /* Use copied values, the perfect way to test if all went well. */
-    crtc->funcs->gamma_set(crtc, crtc->gamma_red, crtc->gamma_green,
-                                            crtc->gamma_blue, crtc->gamma_size);
+    
 
     free(red);
 
@@ -2440,8 +2448,6 @@ xf86InitialConfiguration (ScrnInfoPtr scrn, Bool canGrow)
 	    crtc->desiredY = output->initial_y;
 	    crtc->desiredTransformPresent = FALSE;
 	    crtc->enabled = TRUE;
-	    crtc->x = output->initial_x;
-	    crtc->y = output->initial_y;
 	    memcpy (&crtc->panningTotalArea,    &output->initialTotalArea,    sizeof(BoxRec));
 	    memcpy (&crtc->panningTrackingArea, &output->initialTrackingArea, sizeof(BoxRec));
 	    memcpy (crtc->panningBorder,        output->initialBorder,        4*sizeof(INT16));
@@ -2846,6 +2852,7 @@ xf86DisableUnusedFunctions(ScrnInfoPtr pScrn)
 	    crtc->funcs->dpms(crtc, DPMSModeOff);
 	    memset(&crtc->mode, 0, sizeof(crtc->mode));
 	    xf86RotateDestroy(crtc);
+	    crtc->active = FALSE;
 	}
     }
     if (pScrn->pScreen)
@@ -3141,15 +3148,13 @@ xf86_crtc_supports_gamma(ScrnInfoPtr pScrn)
 {
     xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
     xf86CrtcPtr crtc;
-    int c;
 
-    for (c = 0; c < xf86_config->num_crtc; c++) {
-        crtc = xf86_config->crtc[c];
-        if (crtc->funcs->gamma_set)
-            return TRUE;
-        else
+    if (!xf86_config)
 	return FALSE;
-    }
 
+    if (xf86_config->num_crtc == 0)
 	return FALSE;
+    crtc = xf86_config->crtc[0];
+
+    return (crtc->funcs->gamma_set != NULL);
 }

hw/xfree86/modes/xf86Crtc.h

@@ -222,7 +222,7 @@ typedef struct _xf86CrtcFuncs {
 
 } xf86CrtcFuncsRec, *xf86CrtcFuncsPtr;
 
-#define XF86_CRTC_VERSION 2
+#define XF86_CRTC_VERSION 3
 
 struct _xf86Crtc {
     /**
@@ -236,9 +236,9 @@ struct _xf86Crtc {
     ScrnInfoPtr	    scrn;
     
     /**
-     * Active state of this CRTC
+     * Desired state of this CRTC
      *
-     * Set when this CRTC is driving one or more outputs 
+     * Set when this CRTC should be driving one or more outputs 
      */
     Bool	    enabled;
     
@@ -340,11 +340,20 @@ struct _xf86Crtc {
 
     /**
      * Current gamma, especially useful after initial config.
+     * Added in ABI version 3
      */
     CARD16 *gamma_red;
     CARD16 *gamma_green;
     CARD16 *gamma_blue;
     int gamma_size;
+
+    /**
+     * Actual state of this CRTC
+     *
+     * Set to TRUE after modesetting, set to FALSE if no outputs are connected
+     * Added in ABI version 3
+     */
+    Bool	    active;
 };
 
 typedef struct _xf86OutputFuncs {

hw/xfree86/modes/xf86RandR12.c

@@ -1062,7 +1062,10 @@ xf86RandR12CrtcSetGamma (ScreenPtr    pScreen,
     memcpy (crtc->gamma_green, randr_crtc->gammaGreen, crtc->gamma_size * sizeof (CARD16));
     memcpy (crtc->gamma_blue, randr_crtc->gammaBlue, crtc->gamma_size * sizeof (CARD16));
 
-    /* Use copied values, the perfect way to test if all went well. */
+    /* Only set it when the crtc is actually running.
+     * Otherwise it will be set when it's activated.
+     */
+    if (crtc->active)
 	crtc->funcs->gamma_set(crtc, crtc->gamma_red, crtc->gamma_green,
 						crtc->gamma_blue, crtc->gamma_size);