diff --git a/kona-camera.dtsi b/kona-camera.dtsi
index e76f07ad0eb1..b6f117801b88 100644
--- a/kona-camera.dtsi
+++ b/kona-camera.dtsi
@@ -435,7 +435,8 @@
 				<&apps_smmu 0x2420 0x400>,
 				<&apps_smmu 0x2421 0x400>;
 			label = "icp";
-			qcom,iommu-dma-addr-pool = <0x10c00000 0xcf300000>;
+			qcom,iommu-dma-addr-pool = <0x10c00000 0xee300000>;
+			iova-region-discard = <0xdff00000 0x300000>;
 			icp_iova_mem_map: iova-mem-map {
 				iova-mem-region-firmware {
 					/* Firmware region is 5MB */
@@ -465,11 +466,12 @@
 				};
 
 				iova-mem-region-io {
-					/* IO region is approximately 3.3 GB */
+					/* IO region is approximately 3.7 GB */
 					iova-region-name = "io";
 					iova-region-start = <0x10c00000>;
-					iova-region-len = <0xcf300000>;
+					iova-region-len = <0xee300000>;
 					iova-region-id = <0x3>;
+					iova-region-discard = <0xdff00000 0x300000>;
 					status = "ok";
 				};
 
diff --git a/lahaina-camera.dtsi b/lahaina-camera.dtsi
index 0c24a25aa896..d77cb946b32a 100644
--- a/lahaina-camera.dtsi
+++ b/lahaina-camera.dtsi
@@ -435,7 +435,8 @@
 				<&apps_smmu 0x2420 0x400>,
 				<&apps_smmu 0x2421 0xc60>;
 			label = "icp";
-			qcom,iommu-dma-addr-pool = <0x10c00000 0xcf300000>;
+			qcom,iommu-dma-addr-pool = <0x10c00000 0xee300000>;
+			iova-region-discard = <0xdff00000 0x300000>;
 			icp_iova_mem_map: iova-mem-map {
 				iova-mem-region-firmware {
 					/* Firmware region is 5MB */
@@ -465,11 +466,12 @@
 				};
 
 				iova-mem-region-io {
-					/* IO region is approximately 3.3 GB */
+					/* IO region is approximately 3.7 GB */
 					iova-region-name = "io";
 					iova-region-start = <0x10c00000>;
-					iova-region-len = <0xcf300000>;
+					iova-region-len = <0xee300000>;
 					iova-region-id = <0x3>;
+					iova-region-discard = <0xdff00000 0x300000>;
 					status = "ok";
 				};
 
diff --git a/lito-camera.dtsi b/lito-camera.dtsi
index 9cf6320be3d1..ef5f0fba9839 100644
--- a/lito-camera.dtsi
+++ b/lito-camera.dtsi
@@ -386,7 +386,8 @@
 				<&apps_smmu 0x1260 0x0>;
 			label = "icp";
 			qcom,iommu-faults = "non-fatal";
-			qcom,iommu-dma-addr-pool = <0x10c00000 0xcf300000>;
+			qcom,iommu-dma-addr-pool = <0x10c00000 0xee300000>;
+			iova-region-discard = <0xdff00000 0x300000>;
 			icp_iova_mem_map: iova-mem-map {
 				iova-mem-region-firmware {
 					/* Firmware region is 5MB */
@@ -416,11 +417,12 @@
 				};
 
 				iova-mem-region-io {
-					/* IO region is approximately 3.3 GB */
+					/* IO region is approximately 3.7 GB */
 					iova-region-name = "io";
 					iova-region-start = <0x10c00000>;
-					iova-region-len = <0xcf300000>;
+					iova-region-len = <0xee300000>;
 					iova-region-id = <0x3>;
+					iova-region-discard = <0xdff00000 0x300000>;
 					status = "ok";
 				};