[PATCH v3,04/21] v4l: add documentation for secure memory flag

[Yunfei Dong]

From: Jeffrey Kardatzke <jkardatzke at google.com>

Adds documentation for V4L2_MEMORY_FLAG_SECURE.

Signed-off-by: Jeffrey Kardatzke <jkardatzke at google.com>
Signed-off-by: Yunfei Dong <yunfei.dong at mediatek.com>
---
 Documentation/userspace-api/media/v4l/buffer.rst | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/userspace-api/media/v4l/buffer.rst b/Documentation/userspace-api/media/v4l/buffer.rst
index 52bbee81c080..a5a7d1c72d53 100644
--- a/Documentation/userspace-api/media/v4l/buffer.rst
+++ b/Documentation/userspace-api/media/v4l/buffer.rst
@@ -696,7 +696,7 @@ enum v4l2_memory
 
 .. _memory-flags:
 
-Memory Consistency Flags
+Memory Flags
 ------------------------
 
 .. raw:: latex
@@ -728,6 +728,12 @@ Memory Consistency Flags
 	only if the buffer is used for :ref:`memory mapping <mmap>` I/O and the
 	queue reports the :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS
 	<V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability.
+    * .. _`V4L2-MEMORY-FLAG-SECURE`:
+
+      - ``V4L2_MEMORY_FLAG_SECURE``
+      - 0x00000002
+      - DMA bufs passed into the queue will be validated to ensure they were
+	allocated from a secure dma-heap.
 
 .. raw:: latex
 
-- 
2.18.0