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Message-Id: <20251114-gmsl2-3_serdes-v8-11-47499d907990@analog.com>
Date: Fri, 14 Nov 2025 16:51:51 +0200
From: Dumitru Ceclan via B4 Relay <devnull+dumitru.ceclan.analog.com@...nel.org>
To: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Julien Massot <julien.massot@...labora.com>, Rob Herring <robh@...nel.org>,
Niklas Söderlund <niklas.soderlund@...natech.se>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-gpio@...r.kernel.org,
linux-staging@...ts.linux.dev, linux-gpio@...r.kernel.org,
Cosmin Tanislav <demonsingur@...il.com>
Subject: [PATCH v8 11/21] dt-bindings: media: i2c: add MAX9296A, MAX96716A,
MAX96792A
From: Cosmin Tanislav <demonsingur@...il.com>
The MAX9296A deserializer converts single or dual serial inputs to MIPI
CSI-2 outputs. The GMSL2 links operate at a fixed rate of 3Gbps or 6Gbps
in the forward direction and 187.5Mbps in the reverse direction.
In GMSL1 mode, each serial link can be paired with 3.12Gbps or 1.5Gbps
GMSL1 serializers or operate up to 4.5Gbps with GMSL2 serializers with
GMSL1 backward compatibility. The MAX9296A supports mixed GMSL2 and
GMSL1 links. The serial inputs operate independently, allowing videos
with different timings and resolutions to be received on each input.
MAX96716A supports both tunnel and pixel mode.
MAX96792A supports both tunnel and pixel mode, and has two GMSL3 links.
Signed-off-by: Cosmin Tanislav <demonsingur@...il.com>
Acked-by: Rob Herring (Arm) <robh@...nel.org>
---
.../bindings/media/i2c/maxim,max9296a.yaml | 242 +++++++++++++++++++++
MAINTAINERS | 6 +
2 files changed, 248 insertions(+)
diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9296a.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9296a.yaml
new file mode 100644
index 000000000000..de6bfcec5dc6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9296a.yaml
@@ -0,0 +1,242 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2024 Collabora Ltd.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/maxim,max9296a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX9296A GMSL2 to CSI-2 Deserializer
+
+maintainers:
+ - Cosmin Tanislav <cosmin.tanislav@...log.com>
+
+description: >
+ The MAX9296A deserializer converts single or dual serial inputs to
+ MIPI CSI-2 outputs. The GMSL2 links operate at a fixed rate of 3Gbps
+ or 6Gbps in the forward direction and 187.5Mbps in the reverse
+ direction. In GMSL1 mode, each serial link can be paired with 3.12Gbps
+ or 1.5Gbps GMSL1 serializers or operate up to 4.5Gbps with GMSL2
+ serializers with GMSL1 backward compatibility. The MAX9296A supports
+ mixed GMSL2 and GMSL1 links. The serial inputs operate independently,
+ allowing videos with different timings and resolutions to be received
+ on each input.
+
+ MAX96716A supports both tunnel and pixel mode.
+
+ MAX96792A supports both tunnel and pixel mode, and has two GMSL3 links.
+
+properties:
+ compatible:
+ enum:
+ - maxim,max9296a
+ - maxim,max96716a
+ - maxim,max96792a
+
+ reg:
+ maxItems: 1
+
+ powerdown-gpios:
+ maxItems: 1
+ description: Specifier for the GPIO connected to the PWDNB pin.
+
+ port0-poc-supply:
+ description: Regulator providing Power over Coax for GMSL port 0
+
+ port1-poc-supply:
+ description: Regulator providing Power over Coax for GMSL port 1
+
+ i2c-alias-pool:
+ maxItems: 2
+
+ i2c-atr:
+ type: object
+ additionalProperties: false
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ '^i2c@[0-1]$':
+ $ref: /schemas/i2c/i2c-controller.yaml#
+ unevaluatedProperties: false
+ properties:
+ reg:
+ items:
+ minimum: 0
+ maximum: 1
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ patternProperties:
+ '^port@[0-1]$':
+ $ref: /schemas/graph.yaml#/properties/port
+ description: GMSL Input ports 0-1
+
+ '^port@[2-3]$':
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: CSI-2 Output ports 0-1
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ data-lanes:
+ minItems: 1
+ maxItems: 4
+
+ lane-polarities:
+ minItems: 2
+ maxItems: 5
+
+ link-frequencies:
+ maxItems: 1
+
+ required:
+ - data-lanes
+
+ anyOf:
+ - required:
+ - port@2
+ - required:
+ - port@3
+
+required:
+ - compatible
+ - reg
+ - ports
+
+additionalProperties: false
+
+allOf:
+ - $ref: /schemas/i2c/i2c-atr.yaml#
+
+dependentRequired:
+ i2c-atr: [i2c-alias-pool]
+ i2c-alias-pool: [i2c-atr]
+
+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,max9296a";
+ reg = <0x28>;
+ powerdown-gpios = <&main_gpio0 37 GPIO_ACTIVE_LOW>;
+
+ i2c-alias-pool = <0x40 0x41>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ des_gmsl_in_0: endpoint {
+ remote-endpoint = <&ser_0_gmsl_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ des_gmsl_in_1: endpoint {
+ remote-endpoint = <&ser_1_gmsl_out>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+ des_csi_out: endpoint {
+ data-lanes = <1 2 3 4>;
+ link-frequencies = /bits/ 64 <400000000>;
+ remote-endpoint = <&csi_in>;
+ };
+ };
+ };
+
+ i2c-atr {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ serializer@40 {
+ compatible = "maxim,max96717", "maxim,max96717f";
+ reg = <0x40>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ ser_0_csi_in: endpoint {
+ data-lanes = <1 2>;
+ remote-endpoint = <&sensor_0_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ ser_0_gmsl_out: endpoint {
+ remote-endpoint = <&des_gmsl_in_0>;
+ };
+ };
+ };
+ };
+ };
+
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+
+ serializer@40 {
+ compatible = "maxim,max96717", "maxim,max96717f";
+ reg = <0x40>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ #clock-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ ser_1_csi_in: endpoint {
+ data-lanes = <1 2>;
+ remote-endpoint = <&sensor_1_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ ser_1_gmsl_out: endpoint {
+ remote-endpoint = <&des_gmsl_in_1>;
+ };
+ };
+ };
+ };
+ };
+ };
+ };
+ };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index ddecf1ef3bed..5ae68688008d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15252,6 +15252,12 @@ S: Maintained
F: Documentation/devicetree/bindings/iio/proximity/maxbotix,mb1232.yaml
F: drivers/iio/proximity/mb1232.c
+MAXIM GMSL2/3 SERIALIZERS AND DESERIALIZERS
+M: Cosmin Tanislav <cosmin.tanislav@...log.com>
+L: linux-media@...r.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/maxim,max9296a.yaml
+
MAXIM MAX11205 DRIVER
M: Ramona Bolboaca <ramona.bolboaca@...log.com>
L: linux-iio@...r.kernel.org
--
2.43.0
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