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Message-ID: <20240901040658.157425-14-swboyd@chromium.org>
Date: Sat, 31 Aug 2024 21:06:51 -0700
From: Stephen Boyd <swboyd@...omium.org>
To: chrome-platform@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org,
patches@...ts.linux.dev,
devicetree@...r.kernel.org,
Douglas Anderson <dianders@...omium.org>,
Pin-yen Lin <treapking@...omium.org>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Benson Leung <bleung@...omium.org>,
Conor Dooley <conor+dt@...nel.org>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...il.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
dri-devel@...ts.freedesktop.org,
Guenter Roeck <groeck@...omium.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Jonas Karlman <jonas@...boo.se>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Lee Jones <lee@...nel.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Prashant Malani <pmalani@...omium.org>,
Robert Foss <rfoss@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Tzung-Bi Shih <tzungbi@...nel.org>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Daniel Scally <djrscally@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Ivan Orlov <ivan.orlov0322@...il.com>,
linux-acpi@...r.kernel.org,
linux-usb@...r.kernel.org,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Vinod Koul <vkoul@...nel.org>,
"Rob Herring (Arm)" <robh@...nel.org>
Subject: [PATCH v4 13/18] dt-bindings: usb-switch: Extend for DisplayPort altmode
Extend the usb-switch binding to support DisplayPort (DP) alternate
modes. A third port for the DP signal is necessary when a mode-switch is
muxing USB and DP together onto a usb type-c connector. Add data-lanes
to the usbc output node to allow a device using this binding to remap
the data lanes on the output. Add an example to show how this new port
can be used.
Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Conor Dooley <conor+dt@...nel.org>
Cc: Benson Leung <bleung@...omium.org>
Cc: Guenter Roeck <groeck@...omium.org>
Cc: Prashant Malani <pmalani@...omium.org>
Cc: Tzung-Bi Shih <tzungbi@...nel.org>
Cc: <devicetree@...r.kernel.org>
Cc: <chrome-platform@...ts.linux.dev>
Cc: Pin-yen Lin <treapking@...omium.org>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
.../devicetree/bindings/usb/usb-switch.yaml | 89 +++++++++++++++++++
1 file changed, 89 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/usb-switch.yaml b/Documentation/devicetree/bindings/usb/usb-switch.yaml
index f5dc7e23b134..816f295f322f 100644
--- a/Documentation/devicetree/bindings/usb/usb-switch.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-switch.yaml
@@ -52,6 +52,14 @@ properties:
endpoint:
$ref: '#/$defs/usbc-in-endpoint'
+ port@2:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+
+ properties:
+ endpoint:
+ $ref: '#/$defs/dp-endpoint'
+
oneOf:
- required:
- port
@@ -65,6 +73,19 @@ $defs:
$ref: /schemas/graph.yaml#/$defs/endpoint-base
description: Super Speed (SS) output endpoint to a type-c connector
unevaluatedProperties: false
+ properties:
+ data-lanes:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: |
+ An array of physical USB Type-C data lane indexes.
+ - 0 is SSRX1 lane
+ - 1 is SSTX1 lane
+ - 2 is SSTX2 lane
+ - 3 is SSRX2 lane
+ minItems: 4
+ maxItems: 4
+ items:
+ maximum: 3
usbc-in-endpoint:
$ref: /schemas/graph.yaml#/$defs/endpoint-base
@@ -79,7 +100,75 @@ $defs:
items:
maximum: 8
+ dp-endpoint:
+ $ref: /schemas/graph.yaml#/$defs/endpoint-base
+ description: DisplayPort (DP) input from the DP PHY
+ unevaluatedProperties: false
+ properties:
+ data-lanes:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: |
+ An array of physical DP data lane indexes
+ - 0 is DP ML0 lane
+ - 1 is DP ML1 lane
+ - 2 is DP ML2 lane
+ - 3 is DP ML3 lane
+ oneOf:
+ - items:
+ - const: 0
+ - const: 1
+ - items:
+ - const: 0
+ - const: 1
+ - const: 2
+ - const: 3
+
examples:
+ # A USB + DP mode and orientation switch which muxes DP altmode
+ # and USB onto a usb-c-connector node.
+ - |
+ device {
+ mode-switch;
+ orientation-switch;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ endpoint {
+ remote-endpoint = <&usb_c_connector>;
+ data-lanes = <0 1 2 3>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ endpoint {
+ remote-endpoint = <&usb_ss_phy>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ endpoint {
+ remote-endpoint = <&dp_phy>;
+ data-lanes = <0 1 2 3>;
+ };
+ };
+ };
+ };
+
# A USB orientation switch which flips the pin orientation
# for a usb-c-connector node.
- |
--
https://chromeos.dev
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