Currently the driver notifies internal subdevs if the signal is locked or not. This information is also useful for userpace applications e.g. to switch to another input device upon a signal lost event. This commit adds the support for the userspace to subscribe to the V4L2_EVENT_SOURCE_CHANGE and V4L2_EVENT_CTRL events. Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx> --- drivers/media/i2c/tvp5150.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c index 06ca3081f3d1..d59b52775334 100644 --- a/drivers/media/i2c/tvp5150.c +++ b/drivers/media/i2c/tvp5150.c @@ -17,6 +17,7 @@ #include <linux/regmap.h> #include <media/v4l2-async.h> #include <media/v4l2-device.h> +#include <media/v4l2-event.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-mc.h> @@ -1526,6 +1527,19 @@ static int tvp5150_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_regi } #endif +static int tvp5150_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 int tvp5150_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) { int status = tvp5150_read(sd, 0x88); @@ -1617,6 +1631,8 @@ static const struct v4l2_subdev_core_ops tvp5150_core_ops = { .g_register = tvp5150_g_register, .s_register = tvp5150_s_register, #endif + .subscribe_event = tvp5150_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, }; static const struct v4l2_subdev_tuner_ops tvp5150_tuner_ops = { @@ -2045,7 +2061,7 @@ static int tvp5150_probe(struct i2c_client *c) sd = &core->sd; v4l2_i2c_subdev_init(sd, c, &tvp5150_ops); sd->internal_ops = &tvp5150_internal_ops; - sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; if (IS_ENABLED(CONFIG_OF) && np) { res = tvp5150_parse_dt(core, np); -- 2.20.1