[PATCH v3 08/15] [media] vb2: add .buffer_queued() to notify queueing in the driver

From: Gustavo Padovan 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

[PATCH v3 08/15] [media] vb2: add .buffer_queued() to notify queueing in the driver

From: Gustavo Padovan 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