[media] v4l: introduce the fences capability

Drivers capable of using fences (vb2 drivers) should report the
V4L2_CAP_FENCES to userspace, so add this flag to the uapi.

Change-Id: I61d994bfb768aced3242c304d6e4f22a8d806b1d
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Signed-off-by: Janghyuck Kim <janghyuck.kim@samsung.com>

diff --git a/Documentation/media/uapi/v4l/vidioc-querycap.rst b/Documentation/media/uapi/v4l/vidioc-querycap.rst
index 66fb1b3d6e6efe52b07402855bacab3ff9299fb5..41401606530928ac0606a9a3ff000144eceda0b9 100644 (file)
--- a/Documentation/media/uapi/v4l/vidioc-querycap.rst
+++ b/Documentation/media/uapi/v4l/vidioc-querycap.rst
@@ -254,6 +254,9 @@ specification the ioctl returns an ``EINVAL`` error code.
     * - ``V4L2_CAP_TOUCH``
       - 0x10000000
       - This is a touch device.
+    * - ``V4L2_CAP_FENCES``
+      - 0x20000000
+      - The device support explicit synchronization.
     * - ``V4L2_CAP_DEVICE_CAPS``
       - 0x80000000
       - The driver fills the ``device_caps`` field. This capability can

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index ffd441711b35ff2d026d64f03695173437f949ac..feee7e900b2037c427eb585fc413dd1a815c9610 100644 (file)
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -459,6 +459,7 @@ struct v4l2_capability {
 #define V4L2_CAP_STREAMING              0x04000000  /* streaming I/O ioctls */
 
 #define V4L2_CAP_TOUCH                  0x10000000  /* Is a touch device */
+#define V4L2_CAP_FENCES                 0x20000000  /* Supports explicit synchronization */
 
 #define V4L2_CAP_DEVICE_CAPS            0x80000000  /* sets device capabilities field */