[RFC v2 2/7] V4L: Events: Add new ioctls for events

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This patch adds a set of new ioctls to the V4L2 API. The ioctls conform to
V4L2 Events RFC version 2.3:

<URL:http://www.spinics.net/lists/linux-media/msg12033.html>

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 drivers/media/video/v4l2-compat-ioctl32.c |    3 +++
 drivers/media/video/v4l2-ioctl.c          |    3 +++
 include/linux/videodev2.h                 |   24 ++++++++++++++++++++++++
 3 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c
index 997975d..cba704c 100644
--- a/drivers/media/video/v4l2-compat-ioctl32.c
+++ b/drivers/media/video/v4l2-compat-ioctl32.c
@@ -1077,6 +1077,9 @@ long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
 	case VIDIOC_DBG_G_REGISTER:
 	case VIDIOC_DBG_G_CHIP_IDENT:
 	case VIDIOC_S_HW_FREQ_SEEK:
+	case VIDIOC_DQEVENT:
+	case VIDIOC_SUBSCRIBE_EVENT:
+	case VIDIOC_UNSUBSCRIBE_EVENT:
 		ret = do_video_ioctl(file, cmd, arg);
 		break;
 
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 30cc334..bfc4696 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -283,6 +283,9 @@ static const char *v4l2_ioctls[] = {
 
 	[_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
 	[_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
+	[_IOC_NR(VIDIOC_DQEVENT)]	   = "VIDIOC_DQEVENT",
+	[_IOC_NR(VIDIOC_SUBSCRIBE_EVENT)]  = "VIDIOC_SUBSCRIBE_EVENT",
+	[_IOC_NR(VIDIOC_UNSUBSCRIBE_EVENT)] = "VIDIOC_UNSUBSCRIBE_EVENT",
 #endif
 };
 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 54af357..9ae9a1c 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1536,6 +1536,27 @@ struct v4l2_streamparm {
 };
 
 /*
+ *	E V E N T S
+ */
+
+struct v4l2_event {
+	__u32		count;
+	__u32		type;
+	__u32		sequence;
+	struct timespec	timestamp;
+	__u32		reserved[9];
+	__u8		data[64];
+};
+
+struct v4l2_event_subscription {
+	__u32		type;
+	__u32		reserved[7];
+};
+
+#define V4L2_EVENT_ALL				0
+#define V4L2_EVENT_PRIVATE_START		0x08000000
+
+/*
  *	A D V A N C E D   D E B U G G I N G
  *
  *	NOTE: EXPERIMENTAL API, NEVER RELY ON THIS IN APPLICATIONS!
@@ -1651,6 +1672,9 @@ struct v4l2_dbg_chip_ident {
 #endif
 
 #define VIDIOC_S_HW_FREQ_SEEK	 _IOW('V', 82, struct v4l2_hw_freq_seek)
+#define VIDIOC_DQEVENT		 _IOR('V', 83, struct v4l2_event)
+#define VIDIOC_SUBSCRIBE_EVENT	 _IOW('V', 84, struct v4l2_event_subscription)
+#define VIDIOC_UNSUBSCRIBE_EVENT _IOW('V', 85, struct v4l2_event_subscription)
 /* Reminder: when adding new ioctls please add support for them to
    drivers/media/video/v4l2-compat-ioctl32.c as well! */
 
-- 
1.5.6.5

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