Re: [PATCH 1/2] dt-bindings: drm/bridge: Add no-hpd property

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Hello Krzysztof,

On 17/03/23 18:08, Krzysztof Kozlowski wrote:
On 16/03/2023 15:08, Jayesh Choudhary wrote:
From: Rahul T R <r-ravikumar@xxxxxx>

Add no-hpd property to the bindings, to disable
hpd when not connected or unusable

Signed-off-by: Rahul T R <r-ravikumar@xxxxxx>
Signed-off-by: Jayesh Choudhary <j-choudhary@xxxxxx>
---
  .../devicetree/bindings/display/bridge/cdns,mhdp8546.yaml   | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
index b2e8bc6da9d0..69d381195218 100644
--- a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
@@ -57,6 +57,12 @@ properties:
    interrupts:
      maxItems: 1
+ cdns,no-hpd:

There is already no-hpd property.

+    type: boolean
+    description:
+      Set if the HPD line on the bridge isn't hooked up to anything or is
+      otherwise unusable.

It's the property of the panel, not bridge. Unless you want to say that
bridge physically does not have HPD? Does it follow the standard in such
case?

MHDP does have hpd. But the mhdp driver should handle the cases when the
hpd pin of bridge is not connected to that of the DP-connector. This is to add support for that. (optional property)

-Jayesh



Best regards,
Krzysztof




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