stm-st-stm32mp: add libcamera-stm32mp recipe

Integrate ST libcamera recipe from meta-st-openstlinux layer at
openstlinux-6.6-yocto-scarthgap-mpu-v25.06.11 tag. This recipe is required by
the NPU demos in meta-st-x-linux-ai.

Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>

meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-multimedia/libcamera/files/0001-media_device-Add-bool-return-type-to-unlock.patch

@@ -0,0 +1,59 @@
+From 6914c4fd3d53c0c6ea304123bf57429bb64ec16f Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 31 Jan 2024 21:01:27 -0800
+Subject: [PATCH 1/2] media_device: Add bool return type to unlock()
+
+unlock uses lockf which is marked with __attribute__
+((warn_unused_result)) and compilers warn about it and some treat
+-Wunused-result as error with -Werror turned on, It would be good to
+check if lockf failed or succeeded, however, that piece is not changed
+with this, this fixes build with clang++ 18
+
+    ../git/src/libcamera/media_device.cpp:167:2: error: ignoring return value of function declared with 'warn_unused_result' attribute [-Werror,-Wunused-result]
+      167 |         lockf(fd_.get(), F_ULOCK, 0);
+          |         ^~~~~ ~~~~~~~~~~~~~~~~~~~~~
+    1 error generated.
+
+Upstream-Status: Submitted [https://lists.libcamera.org/pipermail/libcamera-devel/2024-February/040380.html]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ include/libcamera/internal/media_device.h | 2 +-
+ src/libcamera/media_device.cpp            | 6 +++---
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/include/libcamera/internal/media_device.h b/include/libcamera/internal/media_device.h
+index eb8cfde4..b09dfd16 100644
+--- a/include/libcamera/internal/media_device.h
++++ b/include/libcamera/internal/media_device.h
+@@ -33,7 +33,7 @@ public:
+ 	bool busy() const { return acquired_; }
+ 
+ 	bool lock();
+-	void unlock();
++	bool unlock();
+ 
+ 	int populate();
+ 	bool isValid() const { return valid_; }
+diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp
+index 2949816b..eaa2fdb0 100644
+--- a/src/libcamera/media_device.cpp
++++ b/src/libcamera/media_device.cpp
+@@ -159,12 +159,12 @@ bool MediaDevice::lock()
+  *
+  * \sa lock()
+  */
+-void MediaDevice::unlock()
++bool MediaDevice::unlock()
+ {
+ 	if (!fd_.isValid())
+-		return;
++		return false;
+ 
+-	lockf(fd_.get(), F_ULOCK, 0);
++	return lockf(fd_.get(), F_ULOCK, 0) == 0;
+ }
+ 
+ /**
+-- 
+2.43.0
+

meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-multimedia/libcamera/files/0001-rpi-Use-alloca-instead-of-variable-length-arrays.patch

@@ -0,0 +1,43 @@
+From 11cc6dbd45f0880beea64cdc514f57484b90bc39 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 20 Feb 2024 18:44:23 -0800
+Subject: [PATCH] rpi: Use malloc instead of variable length arrays
+
+Clang-18+ diagnoses this as error
+
+| ../git/src/ipa/rpi/controller/rpi/alsc.cpp:499:10: error: variable length arrays in C++ are a Clang extension [-Werror,-Wvla-cxx-extension]     |   499 |         int xLo[X], xHi[X];
+|       |                 ^
+
+Upstream-Status: Submitted [https://lists.libcamera.org/pipermail/libcamera-devel/2024-February/040529.html]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+s
+---
+ src/ipa/rpi/controller/rpi/alsc.cpp | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/src/ipa/rpi/controller/rpi/alsc.cpp b/src/ipa/rpi/controller/rpi/alsc.cpp
+index 8a205c60..a7d42614 100644
+--- a/src/ipa/rpi/controller/rpi/alsc.cpp
++++ b/src/ipa/rpi/controller/rpi/alsc.cpp
+@@ -496,8 +496,8 @@ void resampleCalTable(const Array2D<double> &calTableIn,
+ 	 * Precalculate and cache the x sampling locations and phases to save
+ 	 * recomputing them on every row.
+ 	 */
+-	int xLo[X], xHi[X];
+-	double xf[X];
++	int *xLo = (int*)malloc(X), *xHi = (int*)malloc(X);
++	double *xf = (double*)malloc(X);
+ 	double scaleX = cameraMode.sensorWidth /
+ 			(cameraMode.width * cameraMode.scaleX);
+ 	double xOff = cameraMode.cropX / (double)cameraMode.sensorWidth;
+@@ -539,6 +539,9 @@ void resampleCalTable(const Array2D<double> &calTableIn,
+ 			*(out++) = above * (1 - yf) + below * yf;
+ 		}
+ 	}
++	free(xf);
++	free(xHi);
++	free(xLo);
+ }
+ 
+ /* Calculate chrominance statistics (R/G and B/G) for each region. */

meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-multimedia/libcamera/files/0002-options-Replace-use-of-VLAs-in-C.patch

@@ -0,0 +1,128 @@
+From 6e4736180fcaffdb06acf52fd3eb50ba5baa3d2a Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 31 Jan 2024 21:04:28 -0800
+Subject: [PATCH] options: Replace use of VLAs in C++
+
+Clang++ 18 is fussy about this with new warning checks.
+
+   ../git/src/apps/common/options.cpp:882:20: error: variable length arrays in C++ are a Clang extension [-Werror,-Wvla-cxx-extension]
+      882 |         char shortOptions[optionsMap_.size() * 3 + 2];
+          |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Therefore replace using VLAs with alloca and malloc/free
+
+Upstream-Status: Submitted [https://lists.libcamera.org/pipermail/libcamera-devel/2024-February/040381.html]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/apps/common/options.cpp      | 12 ++++++++++--
+ src/libcamera/ipc_unixsocket.cpp | 13 +++++++++----
+ 2 files changed, 19 insertions(+), 6 deletions(-)
+
+diff --git a/src/apps/common/options.cpp b/src/apps/common/options.cpp
+index 4f7e8691..3656f3c1 100644
+--- a/src/apps/common/options.cpp
++++ b/src/apps/common/options.cpp
+@@ -879,8 +879,8 @@ OptionsParser::Options OptionsParser::parse(int argc, char **argv)
+ 	 * Allocate short and long options arrays large enough to contain all
+ 	 * options.
+ 	 */
+-	char shortOptions[optionsMap_.size() * 3 + 2];
+-	struct option longOptions[optionsMap_.size() + 1];
++	char *shortOptions = (char*)malloc(optionsMap_.size() * 3 + 2);
++	struct option *longOptions = (struct option*)malloc(sizeof(struct option) * (optionsMap_.size() + 1));
+ 	unsigned int ids = 0;
+ 	unsigned int idl = 0;
+ 
+@@ -935,12 +935,16 @@ OptionsParser::Options OptionsParser::parse(int argc, char **argv)
+ 			std::cerr << argv[optind - 1] << std::endl;
+ 
+ 			usage();
++			free(shortOptions);
++			free(longOptions);
+ 			return options;
+ 		}
+ 
+ 		const Option &option = *optionsMap_[c];
+ 		if (!parseValue(option, optarg, &options)) {
+ 			usage();
++			free(shortOptions);
++			free(longOptions);
+ 			return options;
+ 		}
+ 	}
+@@ -949,10 +953,14 @@ OptionsParser::Options OptionsParser::parse(int argc, char **argv)
+ 		std::cerr << "Invalid non-option argument '" << argv[optind]
+ 			  << "'" << std::endl;
+ 		usage();
++		free(shortOptions);
++		free(longOptions);
+ 		return options;
+ 	}
+ 
+ 	options.valid_ = true;
++	free(shortOptions);
++	free(longOptions);
+ 	return options;
+ }
+ 
+diff --git a/src/libcamera/ipc_unixsocket.cpp b/src/libcamera/ipc_unixsocket.cpp
+index 1980d374..3bd861cb 100644
+--- a/src/libcamera/ipc_unixsocket.cpp
++++ b/src/libcamera/ipc_unixsocket.cpp
+@@ -8,6 +8,7 @@
+ #include "libcamera/internal/ipc_unixsocket.h"
+ 
+ #include <array>
++#include <cstdint>
+ #include <poll.h>
+ #include <string.h>
+ #include <sys/socket.h>
+@@ -247,8 +248,8 @@ int IPCUnixSocket::sendData(const void *buffer, size_t length,
+ 	iov[0].iov_base = const_cast<void *>(buffer);
+ 	iov[0].iov_len = length;
+ 
+-	char buf[CMSG_SPACE(num * sizeof(uint32_t))];
+-	memset(buf, 0, sizeof(buf));
++	char *buf = (char*)malloc(CMSG_SPACE(num * sizeof(uint32_t)));
++	memset((void*)buf, 0, sizeof(buf));
+ 
+ 	struct cmsghdr *cmsg = (struct cmsghdr *)buf;
+ 	cmsg->cmsg_len = CMSG_LEN(num * sizeof(uint32_t));
+@@ -270,9 +271,11 @@ int IPCUnixSocket::sendData(const void *buffer, size_t length,
+ 		int ret = -errno;
+ 		LOG(IPCUnixSocket, Error)
+ 			<< "Failed to sendmsg: " << strerror(-ret);
++		free(buf);
+ 		return ret;
+ 	}
+ 
++	free(buf);
+ 	return 0;
+ }
+ 
+@@ -283,8 +286,8 @@ int IPCUnixSocket::recvData(void *buffer, size_t length,
+ 	iov[0].iov_base = buffer;
+ 	iov[0].iov_len = length;
+ 
+-	char buf[CMSG_SPACE(num * sizeof(uint32_t))];
+-	memset(buf, 0, sizeof(buf));
++	char *buf = (char*)malloc(CMSG_SPACE(num * sizeof(uint32_t)));
++	memset((void*)buf, 0, sizeof(buf));
+ 
+ 	struct cmsghdr *cmsg = (struct cmsghdr *)buf;
+ 	cmsg->cmsg_len = CMSG_LEN(num * sizeof(uint32_t));
+@@ -305,12 +308,14 @@ int IPCUnixSocket::recvData(void *buffer, size_t length,
+ 		if (ret != -EAGAIN)
+ 			LOG(IPCUnixSocket, Error)
+ 				<< "Failed to recvmsg: " << strerror(-ret);
++		free(buf);
+ 		return ret;
+ 	}
+ 
+ 	if (fds)
+ 		memcpy(fds, CMSG_DATA(cmsg), num * sizeof(uint32_t));
+ 
++	free(buf);
+ 	return 0;
+ }
+ 

meta-digi-arm/dynamic-layers/stm-st-stm32mp/recipes-multimedia/libcamera/libcamera-stm32mp_0.3.0.bb

@@ -0,0 +1,91 @@
+SUMMARY = "Linux libcamera framework"
+SECTION = "libs"
+
+LICENSE = "GPL-2.0-or-later & LGPL-2.1-or-later"
+
+LIC_FILES_CHKSUM = "\
+    file://LICENSES/GPL-2.0-or-later.txt;md5=fed54355545ffd980b814dab4a3b312c \
+    file://LICENSES/LGPL-2.1-or-later.txt;md5=2a4f4fd2128ea2f65047ee63fbca9f68 \
+"
+
+# 0.3.0
+SRC_URI = " \
+        git://git.libcamera.org/libcamera/libcamera.git;protocol=https;branch=master \
+        file://0001-media_device-Add-bool-return-type-to-unlock.patch \
+        file://0002-options-Replace-use-of-VLAs-in-C.patch \
+        file://0001-rpi-Use-alloca-instead-of-variable-length-arrays.patch \
+"
+SRCREV = "aee16c06913422a0ac84ee3217f87a9795e3c2d9"
+
+SRC_URI += " \
+        file://0001-0.3.0-stm32mp-add-dcmipp-ipa.patch \
+"
+PV = "v0.3.0-stm32mp"
+
+PROVIDES += "libcamera"
+
+PE = "1"
+
+S = "${WORKDIR}/git"
+
+DEPENDS = "python3-pyyaml-native python3-jinja2-native python3-ply-native python3-jinja2-native udev gnutls chrpath-native libevent libyaml"
+DEPENDS += "${@bb.utils.contains('DISTRO_FEATURES', 'qt', 'qtbase qtbase-native', '', d)}"
+
+PACKAGES =+ "${PN}-gst"
+
+PACKAGECONFIG ??= "gst python"
+PACKAGECONFIG[gst] = "-Dgstreamer=enabled,-Dgstreamer=disabled,gstreamer1.0 gstreamer1.0-plugins-base"
+PACKAGECONFIG[python] = "-Dpycamera=enabled,-Dpycamera=disabled,python3-pybind11"
+
+LIBCAMERA_PIPELINES ??= "dcmipp"
+LIBCAMERA_IPAS = "dcmipp"
+
+EXTRA_OEMESON = " \
+    -Dpipelines=${LIBCAMERA_PIPELINES} \
+    -Dv4l2=true \
+    -Dcam=enabled \
+    -Dlc-compliance=disabled \
+    -Dtest=false \
+    -Ddocumentation=disabled \
+"
+EXTRA_OEMESON += " \
+    -Dipas=${LIBCAMERA_IPAS} \
+"
+
+
+RDEPENDS:${PN} = "${@bb.utils.contains('DISTRO_FEATURES', 'wayland qt', 'qtwayland', '', d)}"
+
+inherit meson pkgconfig python3native python3-dir
+
+do_configure:prepend() {
+    sed -i -e 's|py_compile=True,||' ${S}/utils/ipc/mojo/public/tools/mojom/mojom/generate/template_expander.py
+}
+
+do_install:append() {
+    chrpath -d ${D}${libdir}/libcamera.so
+    chrpath -d ${D}${libexecdir}/libcamera/v4l2-compat.so
+}
+
+do_package:append() {
+    bb.build.exec_func("do_package_recalculate_ipa_signatures", d)
+}
+
+do_package_recalculate_ipa_signatures() {
+    local modules
+    for module in $(find ${PKGD}/usr/lib/libcamera -name "*.so.sign"); do
+        module="${module%.sign}"
+        if [ -f "${module}" ] ; then
+            modules="${modules} ${module}"
+        fi
+    done
+
+    ${S}/src/ipa/ipa-sign-install.sh ${B}/src/ipa-priv-key.pem "${modules}"
+}
+
+FILES:${PN} += " ${libexecdir}/libcamera/v4l2-compat.so"
+FILES:${PN} += "${datadir} ${libdir} ${PYTHON_SITEPACKAGES_DIR}"
+FILES:${PN}-gst = "${libdir}/gstreamer-1.0"
+
+# libcamera-v4l2 explicitly sets _FILE_OFFSET_BITS=32 to get access to
+# both 32 and 64 bit file APIs.
+GLIBC_64BIT_TIME_FLAGS = ""

meta-digi-dey/dynamic-layers/x-linux-ai/recipes-st/packagegroups/packagegroup-dey-x-linux-ai.bb

@@ -8,6 +8,8 @@ inherit packagegroup python3-dir
 COMMON_PACKAGES = " \
     stai-mpu-tools \
     tim-vx-tools \
+    libcamera-stm32mp \
+    libcamera-stm32mp-gst \
 "
 
 TFLITE_PACKAGES = " \