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Message-ID: <20240325131634.165361-3-julien.massot@collabora.com>
Date: Mon, 25 Mar 2024 14:16:32 +0100
From: Julien Massot <julien.massot@...labora.com>
To: linux-media@...r.kernel.org
Cc: devicetree@...r.kernel.org,
kernel@...labora.com,
linux-kernel@...r.kernel.org,
mchehab@...nel.org,
robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org,
conor+dt@...nel.org,
sakari.ailus@....fi,
Julien Massot <julien.massot@...labora.com>
Subject: [PATCH v6 2/4] dt-bindings: media: add Maxim MAX96714 GMSL2 Deserializer
Add DT bindings for Maxim MAX96714 GMSL2 Deserializer.
Signed-off-by: Julien Massot <julien.massot@...labora.com>
---
Change since v5:
- Reverse the fallback MAX96714 can fallback to MAX96714F
- Use const instead of enum for MAX96714F compatible
Change since v4:
- Add compatible for MAX96714 and use it as a fallback for MAX96714F
- Remove extra '|' for decriptions
- Reference 'i2c-gate' instead of 'i2c-controller'
Change since v3:
- Renamed file to maxim,max96714.yaml dropped the 'f' suffix
- Removed mention to C-PHY since it's not supported by MAX96714 deserializers
- Removed bus-type requirement on CSI endpoint since the device only support D-PHY
- Removed the clock-lanes property in the dt example
Change since v2:
- remove reg description
- rename enable gpio to powerdown
- use generic node name: i2c, serializer, deserializer
---
.../bindings/media/i2c/maxim,max96714.yaml | 175 ++++++++++++++++++
1 file changed, 175 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml
new file mode 100644
index 000000000000..fdcba14fcde9
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml
@@ -0,0 +1,175 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2024 Collabora Ltd.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/maxim,max96714.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX96714 GMSL2 to CSI-2 Deserializer
+
+maintainers:
+ - Julien Massot <julien.massot@...labora.com>
+
+description:
+ The MAX96714 deserializer converts GMSL2 serial inputs into MIPI
+ CSI-2 D-PHY formatted output. The device allows the GMSL2 link to
+ simultaneously transmit bidirectional control-channel data while forward
+ video transmissions are in progress. The MAX96714 can connect to one
+ remotely located serializer using industry-standard coax or STP
+ interconnects. The device cans operate in pixel or tunnel mode. In pixel mode
+ the MAX96714 can select individual video stream, while the tunnel mode forward all
+ the MIPI data received by the serializer.
+
+ The GMSL2 serial link operates at a fixed rate of 3Gbps or 6Gbps in the
+ forward direction and 187.5Mbps in the reverse direction.
+ MAX96714F only supports a fixed rate of 3Gbps in the forward direction.
+
+properties:
+ compatible:
+ oneOf:
+ - const: maxim,max96714f
+ - items:
+ - enum:
+ - maxim,max96714
+ - const: maxim,max96714f
+
+ reg:
+ maxItems: 1
+
+ powerdown-gpios:
+ maxItems: 1
+ description:
+ Specifier for the GPIO connected to the PWDNB pin.
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/properties/port
+ unevaluatedProperties: false
+ description: GMSL Input
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+ description:
+ Endpoint for GMSL2-Link port.
+
+ port@1:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: CSI-2 Output port
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ data-lanes:
+ minItems: 1
+ maxItems: 4
+
+ lane-polarities:
+ minItems: 1
+ maxItems: 5
+
+ link-frequencies:
+ maxItems: 1
+
+ required:
+ - data-lanes
+
+ required:
+ - port@1
+
+ i2c-gate:
+ $ref: /schemas/i2c/i2c-gate.yaml
+ unevaluatedProperties: false
+ description:
+ The MAX96714 will pass through and forward the I2C requests from the
+ incoming I2C bus over the GMSL2 link. Therefore it supports an i2c-gate
+ subnode to configure a serializer.
+
+ port0-poc-supply:
+ description: Regulator providing Power over Coax for the GMSL port
+
+required:
+ - compatible
+ - reg
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/media/video-interfaces.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ deserializer@28 {
+ compatible = "maxim,max96714f";
+ reg = <0x28>;
+ powerdown-gpios = <&main_gpio0 37 GPIO_ACTIVE_LOW>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ max96714_gmsl_in: endpoint {
+ remote-endpoint = <&max96917f_gmsl_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ max96714_csi_out: endpoint {
+ data-lanes = <1 2 3 4>;
+ link-frequencies = /bits/ 64 <400000000>;
+ remote-endpoint = <&csi_in>;
+ };
+ };
+ };
+
+ i2c-gate {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ serializer@40 {
+ compatible = "maxim,max96717f";
+ reg = <0x40>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ max96717f_csi_in: endpoint {
+ bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
+ data-lanes = <1 2>;
+ lane-polarities = <1 0 1>;
+ remote-endpoint = <&sensor_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ max96917f_gmsl_out: endpoint {
+ remote-endpoint = <&max96714_gmsl_in>;
+ };
+ };
+ };
+ };
+ };
+ };
+ };
+...
--
2.44.0
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