[PATCH v1 1/3] drm/virtio: Add fences for Guest blobs

[Vivek Kasireddy]

Add prepare and cleanup routines for primary planes as well
where a fence is added only if the BO/FB associated with the
plane is a guest blob.

Cc: Gerd Hoffmann <kra...@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasire...@intel.com>
---
 drivers/gpu/drm/virtio/virtgpu_plane.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c 
b/drivers/gpu/drm/virtio/virtgpu_plane.c
index 4e1b17548007..dd7a1f2db9ad 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -206,8 +206,8 @@ static void virtio_gpu_primary_plane_update(struct 
drm_plane *plane,
        virtio_gpu_notify(vgdev);
 }
 
-static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane,
-                                       struct drm_plane_state *new_state)
+static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane,
+                                      struct drm_plane_state *new_state)
 {
        struct drm_device *dev = plane->dev;
        struct virtio_gpu_device *vgdev = dev->dev_private;
@@ -219,7 +219,10 @@ static int virtio_gpu_cursor_prepare_fb(struct drm_plane 
*plane,
 
        vgfb = to_virtio_gpu_framebuffer(new_state->fb);
        bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
-       if (bo && bo->dumb && (plane->state->fb != new_state->fb)) {
+       if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob))
+               return 0;
+
+       if (bo->dumb && (plane->state->fb != new_state->fb)) {
                vgfb->fence = virtio_gpu_fence_alloc(vgdev);
                if (!vgfb->fence)
                        return -ENOMEM;
@@ -228,8 +231,8 @@ static int virtio_gpu_cursor_prepare_fb(struct drm_plane 
*plane,
        return 0;
 }
 
-static void virtio_gpu_cursor_cleanup_fb(struct drm_plane *plane,
-                                        struct drm_plane_state *old_state)
+static void virtio_gpu_plane_cleanup_fb(struct drm_plane *plane,
+                                       struct drm_plane_state *old_state)
 {
        struct virtio_gpu_framebuffer *vgfb;
 
@@ -321,13 +324,15 @@ static void virtio_gpu_cursor_plane_update(struct 
drm_plane *plane,
 }
 
 static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
+       .prepare_fb             = virtio_gpu_plane_prepare_fb,
+       .cleanup_fb             = virtio_gpu_plane_cleanup_fb,
        .atomic_check           = virtio_gpu_plane_atomic_check,
        .atomic_update          = virtio_gpu_primary_plane_update,
 };
 
 static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
-       .prepare_fb             = virtio_gpu_cursor_prepare_fb,
-       .cleanup_fb             = virtio_gpu_cursor_cleanup_fb,
+       .prepare_fb             = virtio_gpu_plane_prepare_fb,
+       .cleanup_fb             = virtio_gpu_plane_cleanup_fb,
        .atomic_check           = virtio_gpu_plane_atomic_check,
        .atomic_update          = virtio_gpu_cursor_plane_update,
 };
-- 
2.30.2