value of the ``num_routes`` field. Application should then reserve enough memory
for all the route entries and call ``VIDIOC_SUBDEV_G_ROUTING`` again.
+On a successful ``VIDIOC_SUBDEV_G_ROUTING`` call the driver updates the
+``num_routes`` field to reflect the actual number of routes returned.
+
.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
.. c:type:: v4l2_subdev_routing
EINVAL
The sink or source pad identifiers reference a non-existing pad, or reference
- pads of different types (ie. the sink_pad identifiers refers to a source pad)
- or the sink or source stream identifiers reference a non-existing stream on
- the sink or source pad.
+ pads of different types (ie. the sink_pad identifiers refers to a source pad).
E2BIG
The application provided ``num_routes`` for ``VIDIOC_SUBDEV_S_ROUTING`` is