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

The USB Type-C DisplayPort alternate mode driver will find
"displayport" property for DRM hotplug event notify[0].

[0]: https://lore.kernel.org/all/20210817215201.795062-9-hdegoede@redhat.com/

Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
---
 .../devicetree/bindings/connector/usb-connector.yaml          | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
index 11e40d225b9f..ccb258972cd6 100644
--- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
+++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
@@ -300,6 +300,10 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint8-array
     maxItems: 4
 
+  displayport:
+    description: A phandle to displayport connector for DRM hotplug event notify.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
 dependencies:
   sink-vdos-v1: [ sink-vdos ]
   sink-vdos: [ sink-vdos-v1 ]
-- 
2.49.0

On Tue, Jul 15, 2025 at 07:24:52PM +0800, Chaoyi Chen wrote:
> From: Chaoyi Chen <chaoyi.chen@rock-chips.com>
> 
> The USB Type-C DisplayPort alternate mode driver will find
> "displayport" property for DRM hotplug event notify[0].
> 
> [0]: https://lore.kernel.org/all/20210817215201.795062-9-hdegoede@redhat.com/
> 
> Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
> ---
>  .../devicetree/bindings/connector/usb-connector.yaml          | 4 ++++
>  1 file changed, 4 insertions(+)
> 

Please see how it was done on other platforms. For example, qualcomm
(both tcpm and pmic-glink) use port / endpoint to link to the DP PHY /
DP controller.

-- 
With best wishes
Dmitry

On 2025/7/15 20:04, Dmitry Baryshkov wrote:

> On Tue, Jul 15, 2025 at 07:24:52PM +0800, Chaoyi Chen wrote:
>> From: Chaoyi Chen <chaoyi.chen@rock-chips.com>
>>
>> The USB Type-C DisplayPort alternate mode driver will find
>> "displayport" property for DRM hotplug event notify[0].
>>
>> [0]: https://lore.kernel.org/all/20210817215201.795062-9-hdegoede@redhat.com/
>>
>> Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
>> ---
>>   .../devicetree/bindings/connector/usb-connector.yaml          | 4 ++++
>>   1 file changed, 4 insertions(+)
>>
> Please see how it was done on other platforms. For example, qualcomm
> (both tcpm and pmic-glink) use port / endpoint to link to the DP PHY /
> DP controller.
Thank you! I'll check these out.

On 15/07/2025 13:24, Chaoyi Chen wrote:
> From: Chaoyi Chen <chaoyi.chen@rock-chips.com>
> 
> The USB Type-C DisplayPort alternate mode driver will find
> "displayport" property for DRM hotplug event notify[0].
> 
> [0]: https://lore.kernel.org/all/20210817215201.795062-9-hdegoede@redhat.com/
> 
> Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
> ---
>  .../devicetree/bindings/connector/usb-connector.yaml          | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
> index 11e40d225b9f..ccb258972cd6 100644
> --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
> +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
> @@ -300,6 +300,10 @@ properties:
>      $ref: /schemas/types.yaml#/definitions/uint8-array
>      maxItems: 4
>  
> +  displayport:
> +    description: A phandle to displayport connector for DRM hotplug event notify.
> +    $ref: /schemas/types.yaml#/definitions/phandle

That's not how you express graphs. Plus I don't understand why you need
ONE more port property, beside existing ones.

Look at the binding first - what's there.



Best regards,
Krzysztof