dts: bcm2711: Disable DVP by default

The HDMI DVP should be disabled by default as is the case for other display related drivers. This changes resolves an issue when using the legacy firmware display driver where the DVP caused the 108 MHz clock in HDMI TX to be gated off when Linux started. This effectively stopped the firmware from being able to change the HDMI analog PHY registers. Add a fragment to re-enable this in vc4-kms-v3d-pi4-overlay
raspberrypi · Aug 7, 2020 · f2f7e4b · f2f7e4b
1 parent 8ae5f3e
commit f2f7e4b
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diff --git a/arch/arm/boot/dts/bcm2711-rpi.dtsi b/arch/arm/boot/dts/bcm2711-rpi.dtsi
@@ -46,6 +46,7 @@
 			clocks = <&clk_108MHz>;
 			#clock-cells = <1>;
 			#reset-cells = <1>;
+			status = "disabled";
 		};
 
 		hdmi0: hdmi@7ef00700 {

diff --git a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
@@ -145,6 +145,13 @@
 		};
 	};
 
+	fragment@20 {
+		target = <&dvp>;
+		__overlay__  {
+			status = "okay";
+		};
+	};
+
 	__overrides__ {
 		audio   = <0>,"!17";
 		audio1   = <0>,"!18";