diff options
Diffstat (limited to 'include/media/videobuf2-core.h')
| -rw-r--r-- | include/media/videobuf2-core.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index fc910a622451..6ef2d01197da 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -295,7 +295,7 @@ struct vb2_buffer { * can return an error if hardware fails, in that case all * buffers that have been already given by the @buf_queue * callback are to be returned by the driver by calling - * @vb2_buffer_done(VB2_BUF_STATE_DEQUEUED). + * @vb2_buffer_done(VB2_BUF_STATE_QUEUED). * If you need a minimum number of buffers before you can * start streaming, then set @min_buffers_needed in the * vb2_queue structure. If that is non-zero then @@ -356,8 +356,8 @@ struct v4l2_fh; * @buf_struct_size: size of the driver-specific buffer structure; * "0" indicates the driver doesn't want to use a custom buffer * structure type, so sizeof(struct vb2_buffer) will is used - * @timestamp_flags: Timestamp flags; V4L2_BUF_FLAGS_TIMESTAMP_* and - * V4L2_BUF_FLAGS_TSTAMP_SRC_* + * @timestamp_flags: Timestamp flags; V4L2_BUF_FLAG_TIMESTAMP_* and + * V4L2_BUF_FLAG_TSTAMP_SRC_* * @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. @@ -366,6 +366,7 @@ struct v4l2_fh; * cannot be started unless at least this number of buffers * have been queued into the driver. * + * @mmap_lock: private mutex used when buffers are allocated/freed/mmapped * @memory: current memory type used * @bufs: videobuf buffer structures * @num_buffers: number of allocated/used buffers @@ -380,6 +381,9 @@ struct v4l2_fh; * @start_streaming_called: start_streaming() was called successfully and we * started streaming. * @error: a fatal error occurred on the queue + * @waiting_for_buffers: used in poll() to check if vb2 is still waiting for + * buffers. Only set for capture queues if qbuf has not yet been + * called since poll() needs to return POLLERR in that situation. * @fileio: file io emulator internal data, used only if emulator is active * @threadio: thread io internal data, used only if thread is active */ @@ -399,6 +403,7 @@ struct vb2_queue { u32 min_buffers_needed; /* private: internal use only */ + struct mutex mmap_lock; enum v4l2_memory memory; struct vb2_buffer *bufs[VIDEO_MAX_FRAME]; unsigned int num_buffers; @@ -417,6 +422,7 @@ struct vb2_queue { unsigned int streaming:1; unsigned int start_streaming_called:1; unsigned int error:1; + unsigned int waiting_for_buffers:1; struct vb2_fileio_data *fileio; struct vb2_threadio_data *threadio; @@ -588,6 +594,15 @@ vb2_plane_size(struct vb2_buffer *vb, unsigned int plane_no) return 0; } +/** + * vb2_start_streaming_called() - return streaming status of driver + * @q: videobuf queue + */ +static inline bool vb2_start_streaming_called(struct vb2_queue *q) +{ + return q->start_streaming_called; +} + /* * The following functions are not part of the vb2 core API, but are simple * helper functions that you can use in your struct v4l2_file_operations, |