This helper is needed for framebuffer synchronization. Old framebuffer data is often displayed on the guest display without this helper. Cc: Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx> Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx> Cc: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx> Signed-off-by: Dongwon Kim <dongwon.kim@xxxxxxxxx> --- 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 51b14ee4ece9..968afd0029fa 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" @@ -270,6 +271,9 @@ 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
