diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index ce9294a635cc5032cf7055a67d03eb40ca0bf047..e07b6bdb6982c14f5004068ce2c8313c5773d0fa 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -499,9 +499,9 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
 			pr_info("     buf_init: %u buf_cleanup: %u buf_prepare: %u buf_finish: %u\n",
 				vb->cnt_buf_init, vb->cnt_buf_cleanup,
 				vb->cnt_buf_prepare, vb->cnt_buf_finish);
-			pr_info("     buf_queue: %u buf_done: %u buf_request_complete: %u\n",
-				vb->cnt_buf_queue, vb->cnt_buf_done,
-				vb->cnt_buf_request_complete);
+			pr_info("     buf_out_validate: %u buf_queue: %u buf_done: %u buf_request_complete: %u\n",
+				vb->cnt_buf_out_validate, vb->cnt_buf_queue,
+				vb->cnt_buf_done, vb->cnt_buf_request_complete);
 			pr_info("     alloc: %u put: %u prepare: %u finish: %u mmap: %u\n",
 				vb->cnt_mem_alloc, vb->cnt_mem_put,
 				vb->cnt_mem_prepare, vb->cnt_mem_finish,
@@ -1277,6 +1277,14 @@ static int __buf_prepare(struct vb2_buffer *vb)
 		return 0;
 	WARN_ON(vb->synced);
 
+	if (q->is_output) {
+		ret = call_vb_qop(vb, buf_out_validate, vb);
+		if (ret) {
+			dprintk(1, "buffer validation failed\n");
+			return ret;
+		}
+	}
+
 	vb->state = VB2_BUF_STATE_PREPARING;
 
 	switch (q->memory) {
@@ -1523,6 +1531,14 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
 			return -EINVAL;
 		}
 
+		if (q->is_output && !vb->prepared) {
+			ret = call_vb_qop(vb, buf_out_validate, vb);
+			if (ret) {
+				dprintk(1, "buffer validation failed\n");
+				return ret;
+			}
+		}
+
 		media_request_object_init(&vb->req_obj);
 
 		/* Make sure the request is in a safe state for updating. */
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 4a737b2c610bf0a5f2f246c36b3bae4775543043..4849b865b9085142aa5cf7e4ecf4f8297aca95ab 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -296,6 +296,7 @@ struct vb2_buffer {
 	u32		cnt_mem_num_users;
 	u32		cnt_mem_mmap;
 
+	u32		cnt_buf_out_validate;
 	u32		cnt_buf_init;
 	u32		cnt_buf_prepare;
 	u32		cnt_buf_finish;
@@ -342,6 +343,9 @@ struct vb2_buffer {
  * @wait_finish:	reacquire all locks released in the previous callback;
  *			required to continue operation after sleeping while
  *			waiting for a new buffer to arrive.
+ * @buf_out_validate:	called when the output buffer is prepared or queued
+ *			to a request; drivers can use this to validate
+ *			userspace-provided information; optional.
  * @buf_init:		called once after allocating a buffer (in MMAP case)
  *			or after acquiring a new USERPTR buffer; drivers may
  *			perform additional buffer-related initialization;
@@ -409,6 +413,7 @@ struct vb2_ops {
 	void (*wait_prepare)(struct vb2_queue *q);
 	void (*wait_finish)(struct vb2_queue *q);
 
+	int (*buf_out_validate)(struct vb2_buffer *vb);
 	int (*buf_init)(struct vb2_buffer *vb);
 	int (*buf_prepare)(struct vb2_buffer *vb);
 	void (*buf_finish)(struct vb2_buffer *vb);