| Message ID | 20181205165537.21502-1-luca@lucaceresoli.net (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | media: v4l2-subdev: document controls need _FL_HAS_DEVNODE | expand |
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 9102d6ca566e..47af609dc8f1 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -776,7 +776,11 @@ struct v4l2_subdev_internal_ops { #define V4L2_SUBDEV_FL_IS_SPI (1U << 1) /* Set this flag if this subdev needs a device node. */ #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2) -/* Set this flag if this subdev generates events. */ +/* + * Set this flag if this subdev generates events. + * Note controls can send events, thus drivers exposing controls + * should set this flag. + */ #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3) struct regulator_bulk_data;
Control events can be subscribed and received by the user. Therefore drivers that support controls must expose the V4L2_SUBDEV_FL_HAS_EVENTS flag. [As discussed in https://lkml.org/lkml/2018/11/27/637] Reported-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> --- include/media/v4l2-subdev.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)