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Subject[PATCH] media: imx: capture: Allow event subscribe/unsubscribe
Date
Implement the vidioc_(un)subscribe_event operations. Imx will allow
subscribing to the imx-specific frame interval error events, events
from subdevices (V4L2_EVENT_SOURCE_CHANGE), and control events.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
---
drivers/staging/media/imx/imx-media-capture.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/staging/media/imx/imx-media-capture.c b/drivers/staging/media/imx/imx-media-capture.c
index b37e1186eb2f..4dfbe05d203e 100644
--- a/drivers/staging/media/imx/imx-media-capture.c
+++ b/drivers/staging/media/imx/imx-media-capture.c
@@ -335,6 +335,21 @@ static int capture_s_parm(struct file *file, void *fh,
return 0;
}

+static int capture_subscribe_event(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR:
+ return v4l2_event_subscribe(fh, sub, 0, NULL);
+ case V4L2_EVENT_SOURCE_CHANGE:
+ return v4l2_src_change_event_subscribe(fh, sub);
+ case V4L2_EVENT_CTRL:
+ return v4l2_ctrl_subscribe_event(fh, sub);
+ default:
+ return -EINVAL;
+ }
+}
+
static const struct v4l2_ioctl_ops capture_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,

@@ -362,6 +377,9 @@ static const struct v4l2_ioctl_ops capture_ioctl_ops = {
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
+
+ .vidioc_subscribe_event = capture_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

/*
--
2.17.1
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