xen: re-enable refresh interval reporting for xenfb

xenfb informs the guest about the gui refresh interval so it can avoid
pointless work.  That logic was temporarely disabled for the
DisplayState reorganization.  Restore it now, with a proper interface
for it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/ui/console.c b/ui/console.c
index 5bbc891f25..43ff80b451 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -182,6 +182,7 @@ static void gui_update(void *opaque)
     uint64_t dcl_interval;
     DisplayState *ds = opaque;
     DisplayChangeListener *dcl;
+    int i;
 
     ds->refreshing = true;
     dpy_refresh(ds);
@@ -196,6 +197,11 @@ static void gui_update(void *opaque)
     }
     if (ds->update_interval != interval) {
         ds->update_interval = interval;
+        for (i = 0; i < nb_consoles; i++) {
+            if (consoles[i]->hw_ops->update_interval) {
+                consoles[i]->hw_ops->update_interval(consoles[i]->hw, interval);
+            }
+        }
         trace_console_refresh(interval);
     }
     ds->last_update = qemu_get_clock_ms(rt_clock);