linux-kernel - [PATCH v2 1/5] dt-bindings: phy: rockchip: rk3399-typec-phy: Support mode-switch

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Message-Id: <20250718062619.99-2-kernel@airkyi.com>
Date: Fri, 18 Jul 2025 14:26:15 +0800
From: Chaoyi Chen <kernel@...kyi.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Sandy Huang <hjc@...k-chips.com>,
	Andy Yan <andy.yan@...k-chips.com>,
	Yubing Zhang <yubing.zhang@...k-chips.com>,
	Frank Wang <frank.wang@...k-chips.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Amit Sunil Dhamne <amitsd@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Chaoyi Chen <chaoyi.chen@...k-chips.com>,
	Dragan Simic <dsimic@...jaro.org>,
	Johan Jonker <jbx6244@...il.com>,
	Diederik de Haas <didi.debian@...ow.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-phy@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH v2 1/5] dt-bindings: phy: rockchip: rk3399-typec-phy: Support mode-switch

From: Chaoyi Chen <chaoyi.chen@...k-chips.com>

The RK3399 has two USB/DP combo PHY. With the help of external Type-C
controller, the PHY can switch altmode between USB and DP.

Their connection diagram is shown below:

external Type-C Chip0 ---> USB/DP PHY0 ---+
                                          | <----> CDN-DP controller
external Type-C Chip1 ---> USB/DP PHY1 ---+

This patch add new "mode-switch" property for dp-port to indicate
whether the PHY can handle altmode switching.

Signed-off-by: Chaoyi Chen <chaoyi.chen@...k-chips.com>
---

Changes in v2:
- Reuse dp-port/usb3-port in rk3399-typec-phy binding.

 .../devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
index 91c011f68cd0..d503de7c7569 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
@@ -51,6 +51,10 @@ properties:
       '#phy-cells':
         const: 0
 
+      mode-switch:
+        description: Flag the port as possible handler of altmode switching
+        type: boolean
+
       port:
         $ref: /schemas/graph.yaml#/properties/port
         description: Connection to USB Type-C connector
-- 
2.49.0