[v2,07/14,media] vb2: add .buffer_queued() to notify queueing in the driver

Commit Message

Gustavo Padovan Sept. 1, 2017, 1:50 a.m. UTC

From: Gustavo Padovan <[e-mail]>

With the upcoming explicit synchronization support to V4L2 we need a
way to notify userspace when buffers are queued to the driver - buffers
with fences attached to it can only be queued once the fence signal, so
the queueing to the driver might be deferred.

Yet, userspace still wants to be notified, so the buffer_queued() callback
was added to vb2_buf_ops for that purpose.

Signed-off-by: Gustavo Padovan <[e-mail]>
---
 include/media/videobuf2-core.h | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index cad45e49a46d..46049dec7f61 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -412,6 +412,8 @@  struct vb2_ops {
  *			will return an error.
  * @copy_timestamp:	copy the timestamp from a userspace structure to
  *			the vb2_buffer struct.
+ * @buffer_queued:	VB2 uses this to notify the VB2-client that the buffer
+ *			was queued to the driver.
  */
 struct vb2_buf_ops {
 	int (*verify_planes_array)(struct vb2_buffer *vb, const void *pb);
@@ -419,6 +421,7 @@  struct vb2_buf_ops {
 	int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb,
 				struct vb2_plane *planes);
 	void (*copy_timestamp)(struct vb2_buffer *vb, const void *pb);
+	void (*buffer_queued)(struct vb2_buffer *vb);
 };
 
 /**