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>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/media/rcar_vin.txt | 118 ++++++++++++++++++---
1 file changed, 106 insertions(+), 12 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
index 4c76d82905c9d3b8..ba31431d4b1fbdbb 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.
+
+Each VIN instance has a single parallel input that supports RGB and YUV video,
+with both external synchronization and BT.656 synchronization for the latter.
+Depending on the instance the VIN input is connected to external SoC pins, or
+on Gen3 platforms to a CSI-2 receiver.
- compatible: Must be one or more of the following
- "renesas,vin-r8a7743" for the R8A7743 device
@@ -16,6 +20,8 @@ channel which can be either RGB, YUYV or BT656.
- "renesas,vin-r8a7793" for the R8A7793 device
- "renesas,vin-r8a7794" for the R8A7794 device
- "renesas,vin-r8a7795" for the R8A7795 device
+ - "renesas,vin-r8a7796" for the R8A7796 device
+ - "renesas,vin-r8a77970" for the R8A77970 device
- "renesas,rcar-gen2-vin" for a generic R-Car Gen2 or RZ/G1 compatible
device.
- "renesas,rcar-gen3-vin" for a generic R-Car Gen3 compatible device.
@@ -31,21 +37,38 @@ 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 platforms:
- 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.
- These settings are used to work out video input format and widths
- into the system.
+The per-board settings Gen3 platforms:
+Gen3 platforms can support both a single connected parallel input source
+from external SoC pins (port0) and/or multiple parallel input sources
+from local SoC CSI-2 receivers (port1) depending on SoC.
-Device node example
--------------------
+- renesas,id - ID number of the VIN, VINx in the documentation.
+- ports
+ - port 0 - sub-node describing a single endpoint connected to the VIN
+ from external SoC pins described in video-interfaces.txt[1].
+ Describing more then one endpoint in port 0 is invalid. Only VIN
+ instances that are connected to external pins should have port 0.
+ - port 1 - sub-nodes describing one or more endpoints connected to
+ the VIN from local SoC CSI-2 receivers. The endpoint numbers must
+ use the following schema.
- aliases {
- vin0 = &vin0;
- };
+ - Endpoint 0 - sub-node describing the endpoint connected to CSI20
+ - Endpoint 1 - sub-node describing the endpoint connected to CSI21
+ - Endpoint 2 - sub-node describing the endpoint connected to CSI40
+ - Endpoint 3 - sub-node describing the endpoint connected to CSI41
+
+Device node example for Gen2 platforms
+--------------------------------------
+
+ aliases {
+ vin0 = &vin0;
+ };
vin0: vin@e6ef0000 {
compatible = "renesas,vin-r8a7790", "renesas,rcar-gen2-vin";
@@ -55,8 +78,8 @@ Device node example
status = "disabled";
};
-Board setup example (vin1 composite video input)
-------------------------------------------------
+Board setup example for Gen2 platforms (vin1 composite video input)
+-------------------------------------------------------------------
&i2c2 {
status = "okay";
@@ -95,6 +118,77 @@ Board setup example (vin1 composite video input)
};
};
+Device node example for Gen3 platforms
+--------------------------------------
+ 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>;
+ resets = <&cpg 811>;
+ 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";
+ 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>;
+ resets = <&cpg 714>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ csi20_in: endpoint {
+ clock-lanes = <0>;
+ data-lanes = <1>;
+ remote-endpoint = <&adv7482_txb>;
+ };
+ };
+
+ port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <1>;
+
+ csi20vin0: endpoint@0 {
+ reg = <0>;
+ remote-endpoint = <&vin0csi20>;
+ };
+ };
+ };
+ };
[1] video-interfaces.txt common video media interface
--
2.16.2
