[PATCH] virtio-gpu: do not replace surface when scanout is disabled

[Dongwon Kim <dongwon.kim@intel.com>]

Surface is replaced with a place holder whenever the surface res
is unreferenced by the guest message. With this logic, there is
very frequent switching between guest display and the place holder
image, which is looking like a flickering display if the guest driver
is designed to unref the current scanout resource before sending out
a new scanout resource. So it is better to leave the current scanout
image until there is a new one flushed by the guest.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
---
 hw/display/virtio-gpu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 66cddd94d9..9d3e922c8f 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -387,7 +387,6 @@ static void virtio_gpu_disable_scanout(VirtIOGPU *g, int scanout_id)
         res->scanout_bitmask &= ~(1 << scanout_id);
     }
 
-    dpy_gfx_replace_surface(scanout->con, NULL);
     scanout->resource_id = 0;
     scanout->ds = NULL;
     scanout->width = 0;
-- 
2.34.1