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media: imx: capture: Allow event subscribe/unsubscribe

PATCH New Steve Longerbeam 1 participant 1 message Jan 15, 2019

Subsystems (4)
Media (V4L/DVB) Arm i.MX and Layerscape Staging Media drivers for Freescale i.MX
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Steve Longerbeam

author maintainer
#0 lore raw

PATCH 1/1 media: imx: capture: Allow event subscribe/unsubscribe

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 <[email protected]>
---
 drivers/staging/media/imx/imx-media-capture.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
drivers/staging/media/imx/imx-media-capture.c +18 -0
index b37e1186eb2f..4dfbe05d203e 100644
@@ -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,
 };
 
 /*
Signature · 1 line
2.17.1