The vb2_queue_has_request() function will check whether a buffer has
been prepared for the given request ID.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/videobuf2-v4l2.c | 17 +++++++++++++++++
include/media/videobuf2-v4l2.h | 2 ++
2 files changed, 19 insertions(+)
diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c
index 2c8776891535..0db7d67092ab 100644
--- a/drivers/media/v4l2-core/videobuf2-v4l2.c
+++ b/drivers/media/v4l2-core/videobuf2-v4l2.c
@@ -753,6 +753,23 @@ void vb2_queue_release(struct vb2_queue *q)
}
EXPORT_SYMBOL_GPL(vb2_queue_release);
+bool vb2_queue_has_request(struct vb2_queue *q, unsigned int request)
+{
+ unsigned int i;
+
+ for (i = 0; i < q->num_buffers; i++) {
+ struct vb2_buffer *vb = q->bufs[i];
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ if (vb->state == VB2_BUF_STATE_PREPARED &&
+ vbuf->request == request)
+ return true;
+ }
+
+ return false;
+}
+EXPORT_SYMBOL_GPL(vb2_queue_has_request);
+
/**
* vb2_poll() - implements poll userspace operation
* @q: videobuf2 queue
diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h
index 48d6a34dcdb4..7cb428fc66ad 100644
--- a/include/media/videobuf2-v4l2.h
+++ b/include/media/videobuf2-v4l2.h
@@ -68,6 +68,8 @@ int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type);
int __must_check vb2_queue_init(struct vb2_queue *q);
void vb2_queue_release(struct vb2_queue *q);
+bool vb2_queue_has_request(struct vb2_queue *q, unsigned int request);
+
unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait);
size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count,
loff_t *ppos, int nonblock);
--
2.4.10
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
