1 files changed, 10 insertions, 4 deletions

diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 36e3e8e2d457..af4621109726 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -356,20 +356,24 @@ struct v4l2_fh;
  * @gfp_flags:  additional gfp flags used when allocating the buffers.
  *              Typically this is 0, but it may be e.g. GFP_DMA or __GFP_DMA32
  *              to force the buffer allocation to a specific memory zone.
+ * @min_buffers_needed: the minimum number of buffers needed before
+ *              start_streaming() can be called. Used when a DMA engine
+ *              cannot be started unless at least this number of buffers
+ *              have been queued into the driver.
  *
  * @memory:     current memory type used
  * @bufs:       videobuf buffer structures
  * @num_buffers: number of allocated/used buffers
  * @queued_list: list of buffers currently queued from userspace
+ * @queued_count: number of buffers queued and ready for streaming.
  * @owned_by_drv_count: number of buffers owned by the driver
  * @done_list:  list of buffers ready to be dequeued to userspace
  * @done_lock:  lock to protect done_list list
  * @done_wq:    waitqueue for processes waiting for buffers ready to be dequeued
  * @alloc_ctx:  memory type/allocator-specific contexts for each plane
  * @streaming:  current streaming state
- * @retry_start_streaming: start_streaming() was called, but there were not enough
- *              buffers queued. If set, then retry calling start_streaming when
- *              queuing a new buffer.
+ * @start_streaming_called: start_streaming() was called successfully and we
+ *              started streaming.
  * @fileio:     file io emulator internal data, used only if emulator is active
  */
 struct vb2_queue {
@@ -385,6 +389,7 @@ struct vb2_queue {
         unsigned int                    buf_struct_size;
         u32                             timestamp_flags;
         gfp_t                           gfp_flags;
+        u32                             min_buffers_needed;
 
 /* private: internal use only */
         enum v4l2_memory                memory;
@@ -392,6 +397,7 @@ struct vb2_queue {
         unsigned int                    num_buffers;
 
         struct list_head                queued_list;
+        unsigned int                    queued_count;
 
         atomic_t                        owned_by_drv_count;
         struct list_head                done_list;
@@ -402,7 +408,7 @@ struct vb2_queue {
         unsigned int                    plane_sizes[VIDEO_MAX_PLANES];
 
         unsigned int                    streaming:1;
-        unsigned int                    retry_start_streaming:1;
+        unsigned int                    start_streaming_called:1;
 
         struct vb2_fileio_data          *fileio;