--- a/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi	2025-03-26 14:07:20.032751128 +0100
+++ b/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi	2025-04-02 12:11:51.001510379 +0200
@@ -68,7 +68,15 @@
 			reg = <0x38000000 0x10000>;
 			no-map;
 		};
-
+		
+		/* Definition für RetRAM-Ringbuffer (als Teil von RetRAM) */
+    		/* Beginnt nach der Interrupt-Vektortabelle bei 0x38000600 */
+    		retram_ringbuffer: retram_ringbuffer@38000600 {
+        	compatible = "shared-dma-pool";
+        	reg = <0x38000600 0xFA00>; /* Rest des 64KB RetRAM */
+        	no-map;
+    		};
+    		
 		gpu_reserved: gpu@d4000000 {
 			reg = <0xd4000000 0x4000000>;
 			no-map;
@@ -83,6 +91,17 @@
 			linux,cma-default;
 		};
 	};
+	
+	/* Virtual RPMSG-Device für OpenAMP Kommunikation */
+	virt_rpmsg: virt_rpmsg@0 {
+    		compatible = "virt,rpmsg";
+    		vdev-nums = <1>;
+    		reg = <0x0 0x0>;
+    		memory-region = <&vdev0buffer>, <&vdev0vring0>, <&vdev0vring1>;
+    		mboxes = <&ipcc 0>, <&ipcc 1>;
+    		mbox-names = "vq0", "vq1";
+    		status = "okay";
+	};
 
 	hdmi: connector {
 		compatible = "hdmi-connector";
@@ -556,7 +575,8 @@
 
 &m4_rproc {
 	memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
-			<&vdev0vring1>, <&vdev0buffer>, <&mcu_rsc_table>;
+			<&vdev0vring1>, <&vdev0buffer>, <&mcu_rsc_table>,
+			<&retram_ringbuffer>;
 	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>;
 	mbox-names = "vq0", "vq1", "shutdown", "detach";
 	interrupt-parent = <&exti>;