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media: rcar-vin: parse Gen3 OF and setup media graph
The parsing and registering CSI-2 subdevices with the v4l2 async
framework is a collaborative effort shared between the VIN instances
which are part of the group. When the last VIN in the group is probed it
asks all other VINs to parse its share of OF and record the async
subdevices it finds in the notifier belonging to the last probed VIN.
Once all CSI-2 subdevices in this notifier are bound proceed to register
all VIN video devices of the group and crate media device links between
all CSI-2 and VIN entities according to the SoC specific routing
configuration.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>