This helper is needed for framebuffer synchronization. Old framebuffer data
is often displayed on the guest display without this helper.
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: Vivek Kasireddy <vivek.kasire...@intel.com>
Signed-off-by: Dongwon Kim <dongwon....@intel.com>
---
drivers/gpu/drm/virtio/virtgpu_plane.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c
b/drivers/gpu/drm/virtio/virtgpu_plane.c
index a063f06ab6c5..e197299489ce 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -26,6 +26,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_atomic_helper.h>
#include "virtgpu_drv.h"
@@ -271,6 +272,9 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane
*plane,
vgfb = to_virtio_gpu_framebuffer(new_state->fb);
vgplane_st = to_virtio_gpu_plane_state(new_state);
bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
+
+ drm_gem_plane_helper_prepare_fb(plane, new_state);
+
if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob))
return 0;
--
2.20.1
