diff options
Diffstat (limited to 'include/media/videobuf2-core.h')
| -rw-r--r-- | include/media/videobuf2-core.h | 14 |
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; |