diff --git a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
index d4bbbb0c60e8..e62a15782790 100644
--- a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
+++ b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
@@ -59,9 +59,14 @@ When the I/O method is not supported the ioctl returns an ``EINVAL`` error
 code.
 
 Applications can call :ref:`VIDIOC_REQBUFS` again to change the number of
-buffers, however this cannot succeed when any buffers are still mapped.
-A ``count`` value of zero frees all buffers, after aborting or finishing
-any DMA in progress, an implicit
+buffers. Note that if any buffers are still mapped or exported via DMABUF,
+then :ref:`VIDIOC_REQBUFS` can only succeed if the
+``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` capability is set. Otherwise
+:ref:`VIDIOC_REQBUFS` will return the ``EBUSY`` error code.
+If ``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` is set, then these buffers are
+orphaned and will be freed when they are unmapped or when the exported DMABUF
+fds are closed. A ``count`` value of zero frees or orphans all buffers, after
+aborting or finishing any DMA in progress, an implicit
 :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`.
 
 
@@ -112,6 +117,7 @@ any DMA in progress, an implicit
 .. _V4L2-BUF-CAP-SUPPORTS-USERPTR:
 .. _V4L2-BUF-CAP-SUPPORTS-DMABUF:
 .. _V4L2-BUF-CAP-SUPPORTS-REQUESTS:
+.. _V4L2-BUF-CAP-SUPPORTS-ORPHANED-BUFS:
 
 .. cssclass:: longtable
 
@@ -132,6 +138,11 @@ any DMA in progress, an implicit
     * - ``V4L2_BUF_CAP_SUPPORTS_REQUESTS``
       - 0x00000008
       - This buffer type supports :ref:`requests <media-request-api>`.
+    * - ``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS``
+      - 0x00000010
+      - The kernel allows calling :ref:`VIDIOC_REQBUFS` while buffers are still
+        mapped or exported via DMABUF. These orphaned buffers will be freed
+        when they are unmapped or when the exported DMABUF fds are closed.
 
 Return Value
 ============
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 73732e04f90b..b0477136f728 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -680,11 +680,9 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
 		 * are not in use and can be freed.
 		 */
 		mutex_lock(&q->mmap_lock);
-		if (q->memory == VB2_MEMORY_MMAP && __buffers_in_use(q)) {
-			mutex_unlock(&q->mmap_lock);
-			dprintk(1, "memory in use, cannot free\n");
-			return -EBUSY;
-		}
+		if (debug && q->memory == VB2_MEMORY_MMAP &&
+		    __buffers_in_use(q))
+			dprintk(1, "memory in use, orphaning buffers\n");
 
 		/*
 		 * Call queue_cancel to clean up any buffers in the PREPARED or
diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index 6e4b03bd4f58..168235c6fdb2 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -484,7 +484,7 @@ EXPORT_SYMBOL(vb2_querybuf);
 
 static void fill_buf_caps(struct vb2_queue *q, u32 *caps)
 {
-	*caps = 0;
+	*caps = V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS;
 	if (q->io_modes & VB2_MMAP)
 		*caps |= V4L2_BUF_CAP_SUPPORTS_MMAP;
 	if (q->io_modes & VB2_USERPTR)
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index f24b5d1f16f4..beded53c6039 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -881,6 +881,7 @@ struct v4l2_requestbuffers {
 #define V4L2_BUF_CAP_SUPPORTS_USERPTR	(1 << 1)
 #define V4L2_BUF_CAP_SUPPORTS_DMABUF	(1 << 2)
 #define V4L2_BUF_CAP_SUPPORTS_REQUESTS	(1 << 3)
+#define V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS (1 << 4)
 
 /**
  * struct v4l2_plane - plane info for multi-planar buffers