Each Gen3 SoC has a limited set of predefined routing possibilities for
which CSI-2 device and virtual channel can be routed to which VIN
instance. Prepare to store this information in the struct rvin_info.

Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-vin.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h 
b/drivers/media/platform/rcar-vin/rcar-vin.h
index 903d8fb8426a7860..ca2c2a23cef8506c 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -43,6 +43,14 @@ enum model_id {
        RCAR_GEN3,
 };
 
+enum rvin_csi_id {
+       RVIN_CSI20,
+       RVIN_CSI21,
+       RVIN_CSI40,
+       RVIN_CSI41,
+       RVIN_CSI_MAX,
+};
+
 /**
  * STOPPED  - No operation in progress
  * RUNNING  - Operation in progress have buffers
@@ -81,12 +89,33 @@ struct rvin_graph_entity {
        unsigned int sink_pad;
 };
 
+/** struct rvin_group_route - Map a CSI-2 receiver and channel to a CHSEL
+ * @vin:               Which VIN the CSI-2 and VC describes
+ * @csi:               VIN internal number for CSI-2 device
+ * @chan:              Output channel of the CSI-2 receiver. Each R-Car CSI-2
+ *                     receiver has four output channels facing the VIN
+ *                     devices, each channel can carry one CSI-2 Virtual
+ *                     Channel (VC) and there are no correlation between
+ *                     output channel number and CSI-2 VC. It's up to the
+ *                     CSI-2 receiver driver to configure which VC is
+ *                     outputted on which channel, the VIN devices only
+ *                     cares about output channels.
+ * @mask:              Bitmask of chsel values which accommodates route
+ */
+struct rvin_group_route {
+       unsigned int vin;
+       enum rvin_csi_id csi;
+       unsigned char chan;
+       unsigned int mask;
+};
+
 /**
  * struct rvin_info - Information about the particular VIN implementation
  * @model:             VIN model
  * @use_mc:            use media controller instead of controlling subdevice
  * @max_width:         max input width the VIN supports
  * @max_height:                max input height the VIN supports
+ * @routes:            routing table VIN <-> CSI-2 for the chsel values
  */
 struct rvin_info {
        enum model_id model;
@@ -94,6 +123,7 @@ struct rvin_info {
 
        unsigned int max_width;
        unsigned int max_height;
+       const struct rvin_group_route *routes;
 };
 
 /**
-- 
2.16.1

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