[PATCH 6/9] dt-bindings: media: snps,dw-hdmi-rx: make hpd-gpios optional

[Sascha Hauer]

hpd-gpios is the +5V line of the HDMI connector, which the source drives
to announce itself. On a board whose HDMI connector belongs to a bridge
placed in front of this receiver, that line goes to the bridge and there
is nothing for the receiver to sense, so the property cannot be
provided.

Drop it from the required list and describe what it actually carries.
The name is unfortunate: the hot plug detect line the receiver drives
back at the source is a controller register, not this GPIO.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
index 7e66dcbdfe2cb..9c6c377417c0b 100644
--- a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
+++ b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
@@ -63,7 +63,12 @@ properties:
     maxItems: 1
 
   hpd-gpios:
-    description: GPIO specifier for HPD.
+    description:
+      The +5V line of the HDMI connector, which the source drives to announce
+      itself. Despite the name this is an input to the receiver; the hot plug
+      detect line the receiver drives back at the source is handled inside the
+      controller. Absent when the connector belongs to a bridge in front of
+      this receiver rather than to the receiver itself.
     maxItems: 1
 
   port:
@@ -96,7 +101,6 @@ required:
   - power-domains
   - resets
   - pinctrl-0
-  - hpd-gpios
 
 additionalProperties: false
 

-- 
2.47.3