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>
Reviewed-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/platform/rcar-vin/rcar-vin.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h
b/drivers/media/platform/rcar-vin/rcar-vin.h
index 5f736a3500b6e10f..41bf24aa8a1a0aed 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -35,6 +35,9 @@
/* Max number on VIN instances that can be in a system */
#define RCAR_VIN_NUM 8
+/* Max number of CHSEL values for any Gen3 SoC */
+#define RCAR_CHSEL_MAX 6
+
enum chip_id {
RCAR_H1,
RCAR_M1,
@@ -91,6 +94,22 @@ struct rvin_graph_entity {
struct rvin_group;
+/** struct rvin_group_chsel - Map a CSI-2 receiver and channel to a CHSEL value
+ * @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.
+ */
+struct rvin_group_chsel {
+ enum rvin_csi_id csi;
+ unsigned int chan;
+};
+
/**
* struct rvin_info - Information about the particular VIN implementation
* @chip: type of VIN chip
@@ -98,6 +117,9 @@ struct rvin_group;
*
* max_width: max input width the VIN supports
* max_height: max input height the VIN supports
+ *
+ * num_chsels: number of possible chsel values for this VIN
+ * chsels: routing table VIN <-> CSI-2 for the chsel values
*/
struct rvin_info {
enum chip_id chip;
@@ -105,6 +127,9 @@ struct rvin_info {
unsigned int max_width;
unsigned int max_height;
+
+ unsigned int num_chsels;
+ struct rvin_group_chsel chsels[RCAR_VIN_NUM][RCAR_CHSEL_MAX];
};
/**
--
2.15.0
