Symbol: V4L2_SUBDEV_MAX_STREAM_ID
drivers/media/v4l2-core/v4l2-subdev.c
1050
if (route->sink_stream > V4L2_SUBDEV_MAX_STREAM_ID ||
drivers/media/v4l2-core/v4l2-subdev.c
1051
route->source_stream > V4L2_SUBDEV_MAX_STREAM_ID)