[PATCH v3 11/20] virtio-gpu: Factor out update scanout

[Vivek Kasireddy <vivek.kasireddy@intel.com>]

Creating a small helper function for updating the scanout
will be useful in the next patch where this needs to be
done early in do_set_scanout before returning.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
---
 hw/display/virtio-gpu.c | 35 +++++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 12 deletions(-)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 1b6e586f94..f96f7590b1 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -558,6 +558,28 @@ static void virtio_unref_resource(pixman_image_t *image, void *data)
     pixman_image_unref(data);
 }
 
+static void virtio_gpu_update_scanout(VirtIOGPU *g,
+                                      uint32_t scanout_id,
+                                      struct virtio_gpu_simple_resource *res,
+                                      struct virtio_gpu_rect *r)
+{
+    struct virtio_gpu_simple_resource *ores;
+    struct virtio_gpu_scanout *scanout;
+
+    scanout = &g->parent_obj.scanout[scanout_id];
+    ores = virtio_gpu_find_resource(g, scanout->resource_id);
+    if (ores) {
+        ores->scanout_bitmask &= ~(1 << scanout_id);
+    }
+
+    res->scanout_bitmask |= (1 << scanout_id);
+    scanout->resource_id = res->resource_id;
+    scanout->x = r->x;
+    scanout->y = r->y;
+    scanout->width = r->width;
+    scanout->height = r->height;
+}
+
 static void virtio_gpu_do_set_scanout(VirtIOGPU *g,
                                       uint32_t scanout_id,
                                       struct virtio_gpu_framebuffer *fb,
@@ -565,7 +587,6 @@ static void virtio_gpu_do_set_scanout(VirtIOGPU *g,
                                       struct virtio_gpu_rect *r,
                                       uint32_t *error)
 {
-    struct virtio_gpu_simple_resource *ores;
     struct virtio_gpu_scanout *scanout;
     uint8_t *data;
 
@@ -625,17 +646,7 @@ static void virtio_gpu_do_set_scanout(VirtIOGPU *g,
                                 scanout->ds);
     }
 
-    ores = virtio_gpu_find_resource(g, scanout->resource_id);
-    if (ores) {
-        ores->scanout_bitmask &= ~(1 << scanout_id);
-    }
-
-    res->scanout_bitmask |= (1 << scanout_id);
-    scanout->resource_id = res->resource_id;
-    scanout->x = r->x;
-    scanout->y = r->y;
-    scanout->width = r->width;
-    scanout->height = r->height;
+    virtio_gpu_update_scanout(g, scanout_id, res, r);
 }
 
 static void virtio_gpu_set_scanout(VirtIOGPU *g,
-- 
2.30.2