diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/videodev2.h | 29 | ||||
| -rw-r--r-- | include/media/v4l2-ctrls.h | 23 | ||||
| -rw-r--r-- | include/media/v4l2-event.h | 2 |
3 files changed, 47 insertions, 7 deletions
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h index 8a4c309d2344..baafe2f2e02a 100644 --- a/include/linux/videodev2.h +++ b/include/linux/videodev2.h @@ -1791,6 +1791,7 @@ struct v4l2_streamparm { #define V4L2_EVENT_ALL 0 #define V4L2_EVENT_VSYNC 1 #define V4L2_EVENT_EOS 2 +#define V4L2_EVENT_CTRL 3 #define V4L2_EVENT_PRIVATE_START 0x08000000 /* Payload for V4L2_EVENT_VSYNC */ @@ -1799,21 +1800,45 @@ struct v4l2_event_vsync { __u8 field; } __attribute__ ((packed)); +/* Payload for V4L2_EVENT_CTRL */ +#define V4L2_EVENT_CTRL_CH_VALUE (1 << 0) +#define V4L2_EVENT_CTRL_CH_FLAGS (1 << 1) + +struct v4l2_event_ctrl { + __u32 changes; + __u32 type; + union { + __s32 value; + __s64 value64; + }; + __u32 flags; + __s32 minimum; + __s32 maximum; + __s32 step; + __s32 default_value; +}; + struct v4l2_event { __u32 type; union { struct v4l2_event_vsync vsync; + struct v4l2_event_ctrl ctrl; __u8 data[64]; } u; __u32 pending; __u32 sequence; struct timespec timestamp; - __u32 reserved[9]; + __u32 id; + __u32 reserved[8]; }; +#define V4L2_EVENT_SUB_FL_SEND_INITIAL (1 << 0) + struct v4l2_event_subscription { __u32 type; - __u32 reserved[7]; + __u32 id; + __u32 flags; + __u32 reserved[5]; }; /* diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index e720f11a56fd..c45bf40e080d 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -28,9 +28,10 @@ /* forward references */ struct v4l2_ctrl_handler; struct v4l2_ctrl; -struct v4l2_fh; struct video_device; struct v4l2_subdev; +struct v4l2_event_subscription; +struct v4l2_fh; /** struct v4l2_ctrl_ops - The control operations that the driver has to provide. * @g_volatile_ctrl: Get a new value for this control. Generally only relevant @@ -107,6 +108,7 @@ struct v4l2_ctrl_ops { struct v4l2_ctrl { /* Administrative fields */ struct list_head node; + struct list_head fhs; struct v4l2_ctrl_handler *handler; struct v4l2_ctrl **cluster; unsigned ncontrols; @@ -180,6 +182,11 @@ struct v4l2_ctrl_handler { int error; }; +struct v4l2_ctrl_fh { + struct list_head node; + struct v4l2_fh *fh; +}; + /** struct v4l2_ctrl_config - Control configuration structure. * @ops: The control ops. * @id: The control ID. @@ -425,9 +432,9 @@ struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id); * This sets or clears the V4L2_CTRL_FLAG_INACTIVE flag atomically. * Does nothing if @ctrl == NULL. * This will usually be called from within the s_ctrl op. + * The V4L2_EVENT_CTRL event will be generated afterwards. * - * This function can be called regardless of whether the control handler - * is locked or not. + * This function assumes that the control handler is locked. */ void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active); @@ -437,11 +444,12 @@ void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active); * * This sets or clears the V4L2_CTRL_FLAG_GRABBED flag atomically. * Does nothing if @ctrl == NULL. + * The V4L2_EVENT_CTRL event will be generated afterwards. * This will usually be called when starting or stopping streaming in the * driver. * - * This function can be called regardless of whether the control handler - * is locked or not. + * This function assumes that the control handler is not locked and will + * take the lock itself. */ void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed); @@ -486,6 +494,11 @@ s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl); */ int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val); +void v4l2_ctrl_add_fh(struct v4l2_ctrl_handler *hdl, + struct v4l2_ctrl_fh *ctrl_fh, + struct v4l2_event_subscription *sub); +void v4l2_ctrl_del_fh(struct v4l2_ctrl *ctrl, struct v4l2_fh *fh); + /* Helpers for ioctl_ops. If hdl == NULL then they will all return -EINVAL. */ int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc); int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm); diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h index 3b86177c8cd2..45e9c1e05513 100644 --- a/include/media/v4l2-event.h +++ b/include/media/v4l2-event.h @@ -40,6 +40,7 @@ struct v4l2_kevent { struct v4l2_subscribed_event { struct list_head list; u32 type; + u32 id; }; struct v4l2_events { @@ -58,6 +59,7 @@ void v4l2_event_free(struct v4l2_fh *fh); int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event, int nonblocking); void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev); +void v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev); int v4l2_event_pending(struct v4l2_fh *fh); int v4l2_event_subscribe(struct v4l2_fh *fh, struct v4l2_event_subscription *sub); |