diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2015-01-20 12:18:16 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-20 13:38:32 -0300 |
| commit | ce0eff016f7272faa6dc6eec722b1ca1970ff9aa (patch) | |
| tree | 07fccd45e846c2c91cbf792a05634566ce6fc6fc /drivers/media/v4l2-core/videobuf2-core.c | |
| parent | f888ae7e6a9e7c0ddc2aa78adc1299747f202516 (diff) | |
[media] vb2: allow requeuing buffers while streaming
vb2_buffer_done() already allows STATE_QUEUED, but currently only when not
streaming. It is useful to allow it while streaming as well, as this makes
it possible for drivers to requeue buffers while waiting for a stable
video signal.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-core.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 552d7e127c39..1a096a62ef30 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -182,6 +182,7 @@ module_param(debug, int, 0644); V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_TIMECODE) static void __vb2_queue_cancel(struct vb2_queue *q); +static void __enqueue_in_driver(struct vb2_buffer *vb); /** * __vb2_buf_mem_alloc() - allocate video memory for the given buffer @@ -1153,8 +1154,9 @@ EXPORT_SYMBOL_GPL(vb2_plane_cookie); /** * vb2_buffer_done() - inform videobuf that an operation on a buffer is finished * @vb: vb2_buffer returned from the driver - * @state: either VB2_BUF_STATE_DONE if the operation finished successfully - * or VB2_BUF_STATE_ERROR if the operation finished with an error. + * @state: either VB2_BUF_STATE_DONE if the operation finished successfully, + * VB2_BUF_STATE_ERROR if the operation finished with an error or + * VB2_BUF_STATE_QUEUED if the driver wants to requeue buffers. * If start_streaming fails then it should return buffers with state * VB2_BUF_STATE_QUEUED to put them back into the queue. * @@ -1205,8 +1207,11 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state) atomic_dec(&q->owned_by_drv_count); spin_unlock_irqrestore(&q->done_lock, flags); - if (state == VB2_BUF_STATE_QUEUED) + if (state == VB2_BUF_STATE_QUEUED) { + if (q->start_streaming_called) + __enqueue_in_driver(vb); return; + } /* Inform any processes that may be waiting for buffers */ wake_up(&q->done_wq); |