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authorLars-Peter Clausen <lars@metafoo.de>2015-06-24 13:50:31 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-07-17 09:48:32 -0300
commit2cf4090fc8db8f9c2f3778a6a3768357a2b6aa6e (patch)
treefad974031a65840b92503941911af518eeab38bc /drivers/media/i2c
parent6f5bcfc30e1918c6029ebfdc9ed5002d618ab3de (diff)
[media] adv7842: Deliver resolution change events to userspace
Use the new v4l2_subdev_notify_event() helper function to deliver the resolution change event to userspace via the v4l2 subdev event queue as well as to the bridge driver using the callback notify mechanism. This allows userspace applications to react to changes in resolution. This is useful and often necessary for video pipelines where there is no direct 1-to-1 relationship between the subdevice converter and the video capture device and hence it does not make sense to directly forward the event to the video capture device node. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> [hans.verkuil@cisco.com: fix obvious mistake: v4l2_event_subdev_unsubscribe -> v4l2_ctrl_subdev_subscribe_event] Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/i2c')
-rw-r--r--drivers/media/i2c/adv7842.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
index 0535463d2fed..897d68c78b06 100644
--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -1981,8 +1981,7 @@ static int adv7842_s_routing(struct v4l2_subdev *sd,
select_input(sd, state->vid_std_select);
enable_input(sd);
- v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT,
- (void *)&adv7842_ev_fmt);
+ v4l2_subdev_notify_event(sd, &adv7842_ev_fmt);
return 0;
}
@@ -2215,8 +2214,7 @@ static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
"%s: fmt_change_cp = 0x%x, fmt_change_digital = 0x%x, fmt_change_sdp = 0x%x\n",
__func__, fmt_change_cp, fmt_change_digital,
fmt_change_sdp);
- v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT,
- (void *)&adv7842_ev_fmt);
+ v4l2_subdev_notify_event(sd, &adv7842_ev_fmt);
if (handled)
*handled = true;
}
@@ -3006,6 +3004,20 @@ static long adv7842_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
return -ENOTTY;
}
+static int adv7842_subscribe_event(struct v4l2_subdev *sd,
+ struct v4l2_fh *fh,
+ struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_SOURCE_CHANGE:
+ return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
+ case V4L2_EVENT_CTRL:
+ return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
+ default:
+ return -EINVAL;
+ }
+}
+
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops adv7842_ctrl_ops = {
@@ -3016,7 +3028,7 @@ static const struct v4l2_subdev_core_ops adv7842_core_ops = {
.log_status = adv7842_log_status,
.ioctl = adv7842_ioctl,
.interrupt_service_routine = adv7842_isr,
- .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .subscribe_event = adv7842_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = adv7842_g_register,

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