[media] media: Add userspace header file for i.MX

This adds a header file for use by userspace programs wanting to interact
with the i.MX media driver. It defines custom events and v4l2 controls for
the i.MX v4l2 subdevices.
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

include/linux/imx-media.h

+/*
+ * Copyright (c) 2014-2017 Mentor Graphics Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+#ifndef __LINUX_IMX_MEDIA_H__
+#define __LINUX_IMX_MEDIA_H__
+
+/*
+ * events from the subdevs
+ */
+#define V4L2_EVENT_IMX_CLASS                V4L2_EVENT_PRIVATE_START
+#define V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR (V4L2_EVENT_IMX_CLASS + 1)
+
+enum imx_ctrl_id {
+	V4L2_CID_IMX_FIM_ENABLE = (V4L2_CID_USER_IMX_BASE + 0),
+	V4L2_CID_IMX_FIM_NUM,
+	V4L2_CID_IMX_FIM_TOLERANCE_MIN,
+	V4L2_CID_IMX_FIM_TOLERANCE_MAX,
+	V4L2_CID_IMX_FIM_NUM_SKIP,
+	V4L2_CID_IMX_FIM_ICAP_EDGE,
+	V4L2_CID_IMX_FIM_ICAP_CHANNEL,
+};
+
+#endif