diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-parade-ps8640.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-parade-ps8640.dtsi
index ebd6765e2afa..e27a769f8cd4 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-parade-ps8640.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-parade-ps8640.dtsi
@@ -26,6 +26,18 @@ pp3300_brij_ps8640: pp3300-brij-ps8640-regulator {
 	};
 };
 
+/*
+ * ADDITIONS TO FIXED REGULATORS DEFINED IN PARENT DEVICE TREE FILES
+ *
+ * Sort order matches the order in the parent files (parents before children).
+ */
+
+&pp3300_dx_edp {
+	off-on-delay-us = <500000>;
+};
+
+/* ADDITIONS TO NODES DEFINED IN PARENT DEVICE TREE FILES */
+
 &dsi0_out {
 	remote-endpoint = <&ps8640_in>;
 };
diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi
index 65333709e529..3188788306d0 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi
@@ -7,6 +7,18 @@
 
 #include <dt-bindings/gpio/gpio.h>
 
+/*
+ * ADDITIONS TO FIXED REGULATORS DEFINED IN PARENT DEVICE TREE FILES
+ *
+ * Sort order matches the order in the parent files (parents before children).
+ */
+
+&pp3300_dx_edp {
+	off-on-delay-us = <500000>;
+};
+
+/* ADDITIONS TO NODES DEFINED IN PARENT DEVICE TREE FILES */
+
 &dsi0_out {
 	remote-endpoint = <&sn65dsi86_in>;
 };