From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
The vb2_qbuf_request() function will queue any buffers for the given request
that are in state PREPARED.
Useful when drivers have to implement the req_queue callback.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/v4l2-core/videobuf2-core.c | 18 ++++++++++++++++++
include/media/videobuf2-core.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index da513b1..4ab65b6 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1923,6 +1923,24 @@ int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
}
EXPORT_SYMBOL_GPL(vb2_qbuf);
+int vb2_qbuf_request(struct vb2_queue *q, u16 request, struct vb2_buffer **p_buf)
+{
+ int buffer;
+
+ for (buffer = 0; buffer < q->num_buffers; buffer++) {
+ struct vb2_buffer *vb = q->bufs[buffer];
+
+ if (vb->v4l2_buf.request == request &&
+ vb->state == VB2_BUF_STATE_PREPARED) {
+ if (p_buf)
+ *p_buf = vb;
+ return vb2_qbuf(q, &vb->v4l2_buf);
+ }
+ }
+ return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(vb2_qbuf_request);
+
/**
* __vb2_wait_for_done_vb() - wait for a buffer to become available
* for dequeuing
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index a3e3596..82fa2a6 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -461,6 +461,7 @@ void vb2_queue_release(struct vb2_queue *q);
void vb2_queue_error(struct vb2_queue *q);
int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b);
+int vb2_qbuf_request(struct vb2_queue *q, u16 request, struct vb2_buffer **p_buf);
int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb);
int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking);
--
2.1.4
--
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