console: add graphic_hw_update_done()

Add a function to be called when a graphic update is done.

Declare the QXL renderer as async: render_update_cookie_num counts the
number of outstanding updates, and graphic_hw_update_done() is called
when it reaches none.

(note: this is preliminary work for asynchronous screendump support)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
index f7fdc4901e..3ce2e57b8f 100644
--- a/hw/display/qxl-render.c
+++ b/hw/display/qxl-render.c
@@ -109,7 +109,7 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
                                                 qxl->guest_primary.surface.mem,
                                                 MEMSLOT_GROUP_GUEST);
         if (!qxl->guest_primary.data) {
-            return;
+            goto end;
         }
         qxl_set_rect_to_surface(qxl, &qxl->dirty[0]);
         qxl->num_dirty_rects = 1;
@@ -137,7 +137,7 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
     }
 
     if (!qxl->guest_primary.data) {
-        return;
+        goto end;
     }
     for (i = 0; i < qxl->num_dirty_rects; i++) {
         if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
@@ -158,6 +158,11 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
                        qxl->dirty[i].bottom - qxl->dirty[i].top);
     }
     qxl->num_dirty_rects = 0;
+
+end:
+    if (qxl->render_update_cookie_num == 0) {
+        graphic_hw_update_done(qxl->ssd.dcl.con);
+    }
 }
 
 /*