Indicate if a control can only be set through a request, as opposed
to being set directly. This is necessary for stateless codecs where
it makes no sense to set the state controls directly.
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
---
.../media/uapi/v4l/vidioc-queryctrl.rst | 4 ++++
.../media/videodev2.h.rst.exceptions | 1 +
include/uapi/linux/videodev2.h | 23 ++++++++++---------
3 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
index f824162d0ea9..b08c69cedb92 100644
--- a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
+++ b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
@@ -539,6 +539,10 @@ See also the examples in :ref:`control`.
``V4L2_CTRL_FLAG_GRABBED`` flag when buffers are allocated or
streaming is in progress since most drivers do not support changing
the format in that case.
+ * - ``V4L2_CTRL_FLAG_REQUIRES_REQUESTS``
+ - 0x0800
+ - This control cannot be set directly, but only through a request
+ (i.e. by setting ``which`` to ``V4L2_CTRL_WHICH_REQUEST_VAL``).
Return Value
diff --git a/Documentation/media/videodev2.h.rst.exceptions
b/Documentation/media/videodev2.h.rst.exceptions
index 64d348e67df9..0caa72014dba 100644
--- a/Documentation/media/videodev2.h.rst.exceptions
+++ b/Documentation/media/videodev2.h.rst.exceptions
@@ -351,6 +351,7 @@ replace define V4L2_CTRL_FLAG_VOLATILE control-flags
replace define V4L2_CTRL_FLAG_HAS_PAYLOAD control-flags
replace define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE control-flags
replace define V4L2_CTRL_FLAG_MODIFY_LAYOUT control-flags
+replace define V4L2_CTRL_FLAG_REQUIRES_REQUESTS control-flags
replace define V4L2_CTRL_FLAG_NEXT_CTRL control
replace define V4L2_CTRL_FLAG_NEXT_COMPOUND control
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 7f035d44666e..a78bfdc1df97 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1736,17 +1736,18 @@ struct v4l2_querymenu {
} __attribute__ ((packed));
/* Control flags */
-#define V4L2_CTRL_FLAG_DISABLED 0x0001
-#define V4L2_CTRL_FLAG_GRABBED 0x0002
-#define V4L2_CTRL_FLAG_READ_ONLY 0x0004
-#define V4L2_CTRL_FLAG_UPDATE 0x0008
-#define V4L2_CTRL_FLAG_INACTIVE 0x0010
-#define V4L2_CTRL_FLAG_SLIDER 0x0020
-#define V4L2_CTRL_FLAG_WRITE_ONLY 0x0040
-#define V4L2_CTRL_FLAG_VOLATILE 0x0080
-#define V4L2_CTRL_FLAG_HAS_PAYLOAD 0x0100
-#define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE 0x0200
-#define V4L2_CTRL_FLAG_MODIFY_LAYOUT 0x0400
+#define V4L2_CTRL_FLAG_DISABLED 0x0001
+#define V4L2_CTRL_FLAG_GRABBED 0x0002
+#define V4L2_CTRL_FLAG_READ_ONLY 0x0004
+#define V4L2_CTRL_FLAG_UPDATE 0x0008
+#define V4L2_CTRL_FLAG_INACTIVE 0x0010
+#define V4L2_CTRL_FLAG_SLIDER 0x0020
+#define V4L2_CTRL_FLAG_WRITE_ONLY 0x0040
+#define V4L2_CTRL_FLAG_VOLATILE 0x0080
+#define V4L2_CTRL_FLAG_HAS_PAYLOAD 0x0100
+#define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE 0x0200
+#define V4L2_CTRL_FLAG_MODIFY_LAYOUT 0x0400
+#define V4L2_CTRL_FLAG_REQUIRES_REQUESTS 0x0800
/* Query flags, to be ORed with the control ID */
#define V4L2_CTRL_FLAG_NEXT_CTRL 0x80000000
--
2.20.1
