[PATCH v5 02/23] videodev2.h: add V4L2_BUF_CAP_REQUIRES_REQUESTS

[Dafna Hirschfeld <dafna3@gmail.com>]

From: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Add capability to indicate that requests are required instead of
merely supported.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 Documentation/media/uapi/v4l/vidioc-reqbufs.rst | 4 ++++
 include/uapi/linux/videodev2.h                  | 1 +
 2 files changed, 5 insertions(+)

diff --git a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
index d7faef10e39b..d42a3d9a7db3 100644
--- a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
+++ b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
@@ -125,6 +125,7 @@ aborting or finishing any DMA in progress, an implicit
 .. _V4L2-BUF-CAP-SUPPORTS-DMABUF:
 .. _V4L2-BUF-CAP-SUPPORTS-REQUESTS:
 .. _V4L2-BUF-CAP-SUPPORTS-ORPHANED-BUFS:
+.. _V4L2-BUF-CAP-REQUIRES-REQUESTS:
 
 .. cssclass:: longtable
 
@@ -150,6 +151,9 @@ aborting or finishing any DMA in progress, an implicit
       - 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.
+    * - ``V4L2_BUF_CAP_REQUIRES_REQUESTS``
+      - 0x00000020
+      - This buffer type requires the use of :ref:`requests <media-request-api>`.
 
 Return Value
 ============
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 1db220da3bcc..97e6a6a968ba 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -895,6 +895,7 @@ struct v4l2_requestbuffers {
 #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)
+#define V4L2_BUF_CAP_REQUIRES_REQUESTS	(1 << 5)
 
 /**
  * struct v4l2_plane - plane info for multi-planar buffers
-- 
2.17.1