Document the devicetree bindings for the CSI-2 inputs available on Gen3.
There is a need to add a custom property 'renesas,id' and to define
which CSI-2 input is described in which endpoint under the port@1 node.
This information is needed since there are a set of predefined routes
between each VIN and CSI-2 block. This routing table will be kept
inside the driver but in order for it to act on it it must know which
VIN and CSI-2 is which.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
---
.../devicetree/bindings/media/rcar_vin.txt | 106 +++++++++++++++++++--
1 file changed, 96 insertions(+), 10 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
index 6e4ef8caf759e5d3..be38ad89d71ad05d 100644
--- a/Documentation/devicetree/bindings/media/rcar_vin.txt
+++ b/Documentation/devicetree/bindings/media/rcar_vin.txt
@@ -2,8 +2,12 @@ Renesas R-Car Video Input driver (rcar_vin)
-------------------------------------------
The rcar_vin device provides video input capabilities for the Renesas R-Car
-family of devices. The current blocks are always slaves and suppot one input
-channel which can be either RGB, YUYV or BT656.
+family of devices.
+
+On Gen2 the current blocks are always slaves and support one input channel
+which can be either RGB, YUYV or BT656. On Gen3 the current blocks are
+always slaves and support multiple input channels which can be either RGB,
+YUVU, BT656 or CSI-2.
- compatible: Must be one or more of the following
- "renesas,vin-r8a7795" for the R8A7795 device
@@ -28,7 +32,7 @@ channel which can be either RGB, YUYV or BT656.
Additionally, an alias named vinX will need to be created to specify
which video input device this is.
-The per-board settings:
+The per-board settings Gen2:
- port sub-node describing a single endpoint connected to the vin
as described in video-interfaces.txt[1]. Only the first one will
be considered as each vin interface has one input port.
@@ -36,13 +40,21 @@ The per-board settings:
These settings are used to work out video input format and widths
into the system.
+The per-board settings Gen3:
+- renesas,id - ID number of the VIN
+- Port 0 - Digital video source (same as port node on Gen2)
+- Port 1 - CSI-2 video sources
+ - Endpoint 0 - sub-node describing the endpoint which is CSI20
+ - Endpoint 1 - sub-node describing the endpoint which is CSI21
+ - Endpoint 2 - sub-node describing the endpoint which is CSI40
+ - Endpoint 3 - sub-node describing the endpoint which is CSI41
-Device node example
--------------------
+Device node example Gen2
+------------------------
- aliases {
- vin0 = &vin0;
- };
+ aliases {
+ vin0 = &vin0;
+ };
vin0: vin@0xe6ef0000 {
compatible = "renesas,vin-r8a7790", "renesas,rcar-gen2-vin";
@@ -52,8 +64,8 @@ Device node example
status = "disabled";
};
-Board setup example (vin1 composite video input)
-------------------------------------------------
+Board setup example Gen2 (vin1 composite video input)
+-----------------------------------------------------
&i2c2 {
status = "ok";
@@ -92,6 +104,80 @@ Board setup example (vin1 composite video input)
};
};
+Device node example Gen3
+------------------------
+
+ vin0: video@e6ef0000 {
+ compatible = "renesas,vin-r8a7795";
+ reg = <0 0xe6ef0000 0 0x1000>;
+ interrupts = <GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cpg CPG_MOD 811>;
+ power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+ status = "disabled";
+
+ renesas,id = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <1>;
+
+ vin0csi20: endpoint@0 {
+ reg = <0>;
+ remote-endpoint= <&csi20vin0>;
+ };
+ vin0csi21: endpoint@1 {
+ reg = <1>;
+ remote-endpoint= <&csi21vin0>;
+ };
+ vin0csi40: endpoint@2 {
+ reg = <2>;
+ remote-endpoint= <&csi40vin0>;
+ };
+ };
+ };
+ };
+
+ csi20: csi2@fea80000 {
+ compatible = "renesas,r8a7795-csi2", "renesas,rcar-gen3-csi2";
+ reg = <0 0xfea80000 0 0x10000>;
+ interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cpg CPG_MOD 714>;
+ power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+ status = "disabled";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <0>;
+ csi20_in: endpoint@0 {
+ clock-lanes = <0>;
+ data-lanes = <1>;
+ remote-endpoint = <&adv7482_txb>;
+ };
+ };
+ port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <1>;
+
+ csi20vin0: endpoint@0 {
+ remote-endpoint = <&vin0csi20>;
+ };
+ };
+ };
+ };
[1] video-interfaces.txt common video media interface
--
2.14.0
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