From c07aa48ec57eca649e987e8f19a336d4373b8da6 Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hans.verkuil@cisco.com>
Date: Mon, 21 May 2018 04:54:51 -0400
Subject: [PATCH] media: videobuf2-core: add request helper functions
Add a new helper function to tell if a request object is a buffer.
Add a new helper function that returns true if a media_request
contains at least one buffer.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---
.../media/common/videobuf2/videobuf2-core.c | 24 +++++++++++++++++++
include/media/videobuf2-core.h | 15 ++++++++++++
2 files changed, 39 insertions(+)
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 16c9a08192cf4..f941bf4bd55f9 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -1362,6 +1362,30 @@ static const struct media_request_object_ops vb2_core_req_ops = {
.release = vb2_req_release,
};
+bool vb2_request_object_is_buffer(struct media_request_object *obj)
+{
+ return obj->ops == &vb2_core_req_ops;
+}
+EXPORT_SYMBOL_GPL(vb2_request_object_is_buffer);
+
+bool vb2_request_has_buffers(struct media_request *req)
+{
+ struct media_request_object *obj;
+ unsigned long flags;
+ bool has_buffers = false;
+
+ spin_lock_irqsave(&req->lock, flags);
+ list_for_each_entry(obj, &req->objects, list) {
+ if (vb2_request_object_is_buffer(obj)) {
+ has_buffers = true;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&req->lock, flags);
+ return has_buffers;
+}
+EXPORT_SYMBOL_GPL(vb2_request_has_buffers);
+
int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb)
{
struct vb2_buffer *vb;
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 957b11c675cba..a9f2a7eae49a2 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -1172,4 +1172,19 @@ bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb);
*/
int vb2_verify_memory_type(struct vb2_queue *q,
enum vb2_memory memory, unsigned int type);
+
+/**
+ * vb2_request_object_is_buffer() - return true if the object is a buffer
+ *
+ * @obj: the request object.
+ */
+bool vb2_request_object_is_buffer(struct media_request_object *obj);
+
+/**
+ * vb2_request_has_buffers() - return true if the request contains buffers
+ *
+ * @req: the request.
+ */
+bool vb2_request_has_buffers(struct media_request *req);
+
#endif /* _MEDIA_VIDEOBUF2_CORE_H */
--
GitLab