st/xorg: Add enter/leave vt hooks for winsys

src/gallium/state_trackers/xorg/xorg_driver.c

@@ -687,6 +687,9 @@ drv_leave_vt(int scrnIndex, int flags)
     xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
     int o;
 
+    if (ms->winsys_leave_vt)
+	ms->winsys_leave_vt(pScrn);
+
     for (o = 0; o < config->num_crtc; o++) {
 	xf86CrtcPtr crtc = config->crtc[o];
 
@@ -749,6 +752,9 @@ drv_enter_vt(int scrnIndex, int flags)
     if (!xf86SetDesiredModes(pScrn))
 	return FALSE;
 
+    if (ms->winsys_enter_vt)
+	ms->winsys_enter_vt(pScrn);
+
     return TRUE;
 }
 

src/gallium/state_trackers/xorg/xorg_tracker.h

@@ -117,6 +117,8 @@ typedef struct _modesettingRec
     /* winsys hocks */
     Bool (*winsys_screen_init)(ScrnInfoPtr pScr);
     Bool (*winsys_screen_close)(ScrnInfoPtr pScr);
+    Bool (*winsys_enter_vt)(ScrnInfoPtr pScr);
+    Bool (*winsys_leave_vt)(ScrnInfoPtr pScr);
     void *winsys_priv;
 
 #ifdef DRM_MODE_FEATURE_DIRTYFB