[RFC 02/10] v4l: Add private compound control type.

[Florent Revest <florent.revest@free-electrons.com>]

From: Pawel Osciak <posciak@chromium.org>

V4L2_CTRL_TYPE_PRIVATE is to be used for private driver compound
controls that use the "ptr" member of struct v4l2_ext_control.

Signed-off-by: Pawel Osciak <posciak@chromium.org>
Signed-off-by: Jung Zhao <jung.zhao@rock-chips.com>
Signed-off-by: Florent Revest <florent.revest@free-electrons.com>
---
 drivers/media/v4l2-core/v4l2-ctrls.c | 4 ++++
 include/uapi/linux/videodev2.h       | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index f7333fe..60056b0 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1543,6 +1543,10 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
 			return -ERANGE;
 		return 0;
 
+	/* FIXME:just return 0 for now */
+	case V4L2_CTRL_TYPE_PRIVATE:
+		return 0;
+
 	default:
 		return -EINVAL;
 	}
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 3eafd3f..904c44c 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1521,6 +1521,8 @@ enum v4l2_ctrl_type {
 	V4L2_CTRL_TYPE_U8	     = 0x0100,
 	V4L2_CTRL_TYPE_U16	     = 0x0101,
 	V4L2_CTRL_TYPE_U32	     = 0x0102,
+
+	V4L2_CTRL_TYPE_PRIVATE       = 0xffff,
 };
 
 /*  Used in the VIDIOC_QUERYCTRL ioctl for querying controls */
-- 
2.7.4