QCLINUX: arm64: dts: qcom: lemans: Add CamX EL2 overlay

Add camx el2 DT overlay for lemans platforms.

The overlay updates the ICP firmware node with Secure SMMU SID
and disables secure QoS updates for CPAS in EL2/KVM configurations.

Wire up the new overlay-built DTBs in the qcom DT Makefile so the
corresponding *-camx-el2.dtb targets are generated.

Co-developed-by: Ignatius Michael Jihan <mignatiu@qti.qualcomm.com>
Signed-off-by: Ignatius Michael Jihan <mignatiu@qti.qualcomm.com>
Signed-off-by: Vikram Sharma <vikramsa@qti.qualcomm.com>

Author: quic-vikramsa

arch/arm64/boot/dts/qcom/Makefile

@@ -395,6 +395,10 @@ lemans-evk-camx-dtbs	:= lemans-evk.dtb lemans-evk-camx.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-camx.dtb
 
+lemans-camx-el2-dtbs	:= lemans-evk-el2.dtb lemans-evk-camx.dtbo lemans-camx-el2.dtbo
+
+dtb-$(CONFIG_ARCH_QCOM)	+= lemans-camx-el2.dtb
+
 monaco-evk-camx-dtbs   := monaco-evk.dtb monaco-evk-camx.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-camx.dtb

arch/arm64/boot/dts/qcom/lemans-camx-el2.dtso

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	/* cam_cpas label -> /soc@0/qcom,cam-cpas *
+	fragment@0 {
+		target-path = "/soc@0/qcom,cam-cpas";
+		__overlay__ {
+			enable-secure-qos-update = <0>;
+		};
+	};
+
+	/* cam_icp_firmware label -> /soc@0/qcom,cam-icp */
+	fragment@1 {
+		target-path = "/soc@0/qcom,cam-icp";
+		__overlay__ {
+			camera-firmware {
+				iommus = <&apps_smmu 0x08c1 0x0400>;
+			};
+		};
+	};
+};