linux-kernel - Re: [PATCH 2/5] dt-bindings: phy: rockchip: rk3399-typec-phy: Support mode/orientation switch

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Message-ID: <4dfed94c-665d-4e04-b527-ddd34fd3db8f@kernel.org>
Date: Tue, 15 Jul 2025 13:34:54 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Chaoyi Chen <kernel@...kyi.com>, 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>
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: Re: [PATCH 2/5] dt-bindings: phy: rockchip: rk3399-typec-phy: Support
 mode/orientation switch

On 15/07/2025 13:24, Chaoyi Chen wrote:
> From: Chaoyi Chen <chaoyi.chen@...k-chips.com>
> 
> Add support for Type-C orientation and altmode switch.
> The Type-C controller can be specified to handling switching.

Please describe the hardware in details. Above sentences don't help me
to understand this.


> 
> Signed-off-by: Chaoyi Chen <chaoyi.chen@...k-chips.com>
> ---
>  .../bindings/phy/rockchip,rk3399-typec-phy.yaml    | 14 ++++++++++++++
>  1 file changed, 14 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..a885c6893a90 100644
> --- a/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/rockchip,rk3399-typec-phy.yaml
> @@ -43,6 +43,20 @@ properties:
>      description:
>        Phandle to the syscon managing the "general register files" (GRF).
>  
> +  orientation-switch:
> +    description: Flag the port as possible handler of orientation switching
> +    type: boolean
> +
> +  mode-switch:
> +    description: Flag the port as possible handler of altmode switching
> +    type: boolean
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/properties/port
> +    description:
> +      A port node to link the PHY to a TypeC controller for the purpose of
> +      handling orientation switching.


You are using usb-switch.yaml properties in phy node, which raises
questions whether this is actually complete. It might be, but commit msg
is so vague that I have doubts.

Also, why only one port?

Or wait... you already have ports! two of them. This needs to stop, why
are you adding more?

Best regards,
Krzysztof