linux-kernel - Re: [PATCH v2 0/3] Fairphone 5 DisplayPort over USB-C support

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Message-Id: <D8V75HO8O4CO.33RMUJLKQ7UG5@fairphone.com>
Date: Tue, 01 Apr 2025 11:32:34 +0200
From: "Luca Weiss" <luca.weiss@...rphone.com>
To: "Dmitry Baryshkov" <lumag@...nel.org>
Cc: "Bjorn Andersson" <andersson@...nel.org>, "Konrad Dybcio"
 <konradybcio@...nel.org>, "Rob Herring" <robh@...nel.org>, "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>, "Conor Dooley" <conor+dt@...nel.org>,
 <cros-qcom-dts-watchers@...omium.org>,
 <~postmarketos/upstreaming@...ts.sr.ht>, <phone-devel@...r.kernel.org>,
 <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, "Konrad Dybcio"
 <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v2 0/3] Fairphone 5 DisplayPort over USB-C support

Hi Dmitry,

On Wed Mar 12, 2025 at 8:06 PM CET, Dmitry Baryshkov wrote:
> On Wed, Mar 12, 2025 at 01:05:07PM +0100, Luca Weiss wrote:
>> This series adds all the necessary bits to enable DisplayPort-out over
>> USB-C on Fairphone 5.
>> 
>> There's currently a dt validation error with this, not quite sure how to
>> resolve this:
>> 
>>   arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dtb: typec-mux@42: port:endpoint: Unevaluated properties are not allowed ('data-lanes' was unexpected)
>>           from schema $id: http://devicetree.org/schemas/usb/fcs,fsa4480.yaml#
>
> This comes from usb-switch.yaml, it requires that 'port' adheres to the
> /schemas/graph.yaml#/properties/port (which forbids extra properties).
> The usb-switch.yaml needs to be fixed to use port-base for that node.

Thanks, do you think the attached patch would be suitable? It does fix
the warning for me, but not sure if it's too lax or doing the wrong
thing.

diff --git a/Documentation/devicetree/bindings/usb/usb-switch.yaml b/Documentation/devicetree/bindings/usb/usb-switch.yaml
index da76118e73a5..9598c1748d35 100644
--- a/Documentation/devicetree/bindings/usb/usb-switch.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-switch.yaml
@@ -26,11 +26,15 @@ properties:
     type: boolean
 
   port:
-    $ref: /schemas/graph.yaml#/properties/port
+    $ref: /schemas/graph.yaml#/$defs/port-base
     description:
       A port node to link the device to a TypeC controller for the purpose of
       handling altmode muxing and orientation switching.
 
+    patternProperties:
+      "^endpoint(@[0-9a-f]+)?$":
+        $ref: /schemas/graph.yaml#/$defs/endpoint-base
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
     properties:


Regards
Luca

>
>> 
>> See also this mail plus replies:
>> * https://lore.kernel.org/linux-arm-msm/D0H3VE6RLM2I.MK2NT1P9N02O@fairphone.com/
>> 
>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
>> ---
>> Changes in v2:
>> - Move adding "*-switch;" properties already in earlier patches
>> - Move wiring up SS USB & DP to SoC instead of being done in device
>> - Pick up tags
>> - Link to v1: https://lore.kernel.org/r/20250226-fp5-pmic-glink-dp-v1-0-e6661d38652c@fairphone.com
>> 
>> ---
>> Luca Weiss (3):
>>       arm64: dts: qcom: qcm6490-fairphone-fp5: Add PTN36502 redriver
>>       arm64: dts: qcom: qcm6490-fairphone-fp5: Add OCP96011 audio switch
>>       arm64: dts: qcom: qcm6490-fairphone-fp5: Hook up DisplayPort over USB-C
>> 
>>  arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 103 +++++++++++++++++++--
>>  arch/arm64/boot/dts/qcom/sc7280.dtsi               |   9 +-
>>  2 files changed, 104 insertions(+), 8 deletions(-)
>> ---
>> base-commit: dcb11dc4740372cd4cce0b763a4a8ec4e9f347a6
>> change-id: 20231208-fp5-pmic-glink-dp-216b76084bee
>> 
>> Best regards,
>> -- 
>> Luca Weiss <luca.weiss@...rphone.com>
>>