[media] adv7604: Add support for control event notifications

Allow userspace applications to subscribe to control change events. This
can e.g. be used to monitor the 5V detect control to be notified when a
source is connected or disconnected.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 21b549a..a7d47e0 100644 (file)
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -42,6 +42,7 @@
 #include <media/adv7604.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
 #include <media/v4l2-dv-timings.h>
 #include <media/v4l2-of.h>
 
@@ -2362,6 +2363,8 @@ 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,
+       .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 #ifdef CONFIG_VIDEO_ADV_DEBUG
        .g_register = adv76xx_g_register,
        .s_register = adv76xx_s_register,
@@ -3047,7 +3050,7 @@ static int adv76xx_probe(struct i2c_client *client,
        snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
                id->name, i2c_adapter_id(client->adapter),
                client->addr);
-       sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+       sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
 
        /* Configure IO Regmap region */
        err = configure_regmap(state, ADV76XX_PAGE_IO);