vmsvga: fix vmsvga_update_display

Fix standard vga mode check:  Both s->config and s->enabled must be set
to enable vmware command fifo processing.

Drop dirty tracking code from the fifo rendering code path, it isn't
used anyway because vmsvga turns off dirty tracking when leaving
standard vga mode.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170421091632.30900-9-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/display/vmware_vga.c

@@ -1118,9 +1118,9 @@ static void vmsvga_update_display(void *opaque)
 {
     struct vmsvga_state_s *s = opaque;
     DisplaySurface *surface;
-    bool dirty = false;
 
-    if (!s->enable) {
+    if (!s->enable || !s->config) {
+        /* in standard vga mode */
         s->vga.hw_ops->gfx_update(&s->vga);
         return;
     }
@@ -1131,26 +1131,11 @@ static void vmsvga_update_display(void *opaque)
     vmsvga_fifo_run(s);
     vmsvga_update_rect_flush(s);
 
-    /*
-     * Is it more efficient to look at vram VGA-dirty bits or wait
-     * for the driver to issue SVGA_CMD_UPDATE?
-     */
-    if (memory_region_is_logging(&s->vga.vram, DIRTY_MEMORY_VGA)) {
-        vga_sync_dirty_bitmap(&s->vga);
-        dirty = memory_region_get_dirty(&s->vga.vram, 0,
-            surface_stride(surface) * surface_height(surface),
-            DIRTY_MEMORY_VGA);
-    }
-    if (s->invalidated || dirty) {
+    if (s->invalidated) {
         s->invalidated = 0;
         dpy_gfx_update(s->vga.con, 0, 0,
                    surface_width(surface), surface_height(surface));
     }
-    if (dirty) {
-        memory_region_reset_dirty(&s->vga.vram, 0,
-            surface_stride(surface) * surface_height(surface),
-            DIRTY_MEMORY_VGA);
-    }
 }
 
 static void vmsvga_reset(DeviceState *dev)