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For such cases, we need an indication for no-hpd, using which we can bypass the hpd detection and instead use the auxiliary channels connected to the DP connector to confirm the connection. So add no-hpd property to the bindings, to disable hpd when not connected or cannot be used for hotplug detection. Acked-by: Krzysztof Kozlowski Signed-off-by: Rahul T R Signed-off-by: Jayesh Choudhary Signed-off-by: Yashas D --- .../bindings/display/bridge/cdns,mhdp8546.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml index c2b369456e4e2..56ce3f65ff495 100644 --- a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml +++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml @@ -57,6 +57,17 @@ properties: interrupts: maxItems: 1 + no-hpd: + type: boolean + description: + Set if the HPD line on the bridge isn't physically connected to the + DisplayPort connector or cannot be used for hotplug detection. + + Valid use cases include HPD pin not routed to the connector on the PCB, + HPD signal muxed with another function on the SoC making it unavailable + for hotplug detection, or hardware design where HPD cannot reliably + detect monitor presence. + ports: $ref: /schemas/graph.yaml#/properties/ports -- 2.34.1