Re: [PATCH 3/6] V4L: Events: Add new ioctls for events

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Reviewed-by: Hans Verkuil <hverkuil@xxxxxxxxx>

On Monday 22 February 2010 16:51:34 Sakari Ailus wrote:
> 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                 |   26 ++++++++++++++++++++++++++
>  3 files changed, 32 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c
> index f77f84b..9004a5f 100644
> --- a/drivers/media/video/v4l2-compat-ioctl32.c
> +++ b/drivers/media/video/v4l2-compat-ioctl32.c
> @@ -1086,6 +1086,9 @@ long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
>  	case VIDIOC_QUERY_DV_PRESET:
>  	case VIDIOC_S_DV_TIMINGS:
>  	case VIDIOC_G_DV_TIMINGS:
> +	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 4b11257..34c7d6e 100644
> --- a/drivers/media/video/v4l2-ioctl.c
> +++ b/drivers/media/video/v4l2-ioctl.c
> @@ -290,6 +290,9 @@ static const char *v4l2_ioctls[] = {
>  	[_IOC_NR(VIDIOC_QUERY_DV_PRESET)]  = "VIDIOC_QUERY_DV_PRESET",
>  	[_IOC_NR(VIDIOC_S_DV_TIMINGS)]     = "VIDIOC_S_DV_TIMINGS",
>  	[_IOC_NR(VIDIOC_G_DV_TIMINGS)]     = "VIDIOC_G_DV_TIMINGS",
> +	[_IOC_NR(VIDIOC_DQEVENT)]	   = "VIDIOC_DQEVENT",
> +	[_IOC_NR(VIDIOC_SUBSCRIBE_EVENT)]  = "VIDIOC_SUBSCRIBE_EVENT",
> +	[_IOC_NR(VIDIOC_UNSUBSCRIBE_EVENT)] = "VIDIOC_UNSUBSCRIBE_EVENT",
>  };
>  #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
>  
> diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
> index 3c26560..f7237fc 100644
> --- a/include/linux/videodev2.h
> +++ b/include/linux/videodev2.h
> @@ -1622,6 +1622,29 @@ struct v4l2_streamparm {
>  };
>  
>  /*
> + *	E V E N T S
> + */
> +
> +struct v4l2_event {
> +	__u32				type;
> +	union {
> +		__u8			data[64];
> +	} u;
> +	__u32				pending;
> +	__u32				sequence;
> +	struct timespec			timestamp;
> +	__u32				reserved[9];
> +};
> +
> +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!
> @@ -1743,6 +1766,9 @@ struct v4l2_dbg_chip_ident {
>  #define	VIDIOC_QUERY_DV_PRESET	_IOR('V',  86, struct v4l2_dv_preset)
>  #define	VIDIOC_S_DV_TIMINGS	_IOWR('V', 87, struct v4l2_dv_timings)
>  #define	VIDIOC_G_DV_TIMINGS	_IOWR('V', 88, struct v4l2_dv_timings)
> +#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! */
> 

-- 
Hans Verkuil - video4linux developer - sponsored by TANDBERG
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