On 06/24/2015 06:50 PM, Lars-Peter Clausen wrote:
> 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 <l...@metafoo.de>
> ---
> drivers/media/i2c/adv7604.c | 23 ++++++++++++++++++-----
> 1 file changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
> index cf1cb5a..b66f63e3 100644
> --- a/drivers/media/i2c/adv7604.c
> +++ b/drivers/media/i2c/adv7604.c
> @@ -1761,8 +1761,8 @@ static int adv76xx_s_routing(struct v4l2_subdev *sd,
> select_input(sd);
> enable_input(sd);
>
> - v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT,
> - (void *)&adv76xx_ev_fmt);
> + v4l2_subdev_notify_event(sd, &adv76xx_ev_fmt);
> +
> return 0;
> }
>
> @@ -1929,8 +1929,7 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32
> status, bool *handled)
> "%s: fmt_change = 0x%x, fmt_change_digital = 0x%x\n",
> __func__, fmt_change, fmt_change_digital);
>
> - v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT,
> - (void *)&adv76xx_ev_fmt);
> + v4l2_subdev_notify_event(sd, &adv76xx_ev_fmt);
>
> if (handled)
> *handled = true;
> @@ -2348,6 +2347,20 @@ static int adv76xx_log_status(struct v4l2_subdev *sd)
> return 0;
> }
>
> +static int adv76xx_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_event_subdev_unsubscribe(sd, fh, sub);
This should be v4l2_ctrl_subdev_subscribe_event() of course. I'll fix this in
the patch before sending the pull request. Ditto for the adv7842 patch.
Regards,
Hans
> + default:
> + return -EINVAL;
> + }
> +}
> +
> /* ----------------------------------------------------------------------- */
>
> static const struct v4l2_ctrl_ops adv76xx_ctrl_ops = {
> @@ -2357,7 +2370,7 @@ static const struct v4l2_ctrl_ops adv76xx_ctrl_ops = {
> static const struct v4l2_subdev_core_ops adv76xx_core_ops = {
> .log_status = adv76xx_log_status,
> .interrupt_service_routine = adv76xx_isr,
> - .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> + .subscribe_event = adv76xx_subscribe_event,
> .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> #ifdef CONFIG_VIDEO_ADV_DEBUG
> .g_register = adv76xx_g_register,
>
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