[libcamera-devel] libcamera starting point on px30 evk
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Thu May 12 13:08:22 CEST 2022
Hi Tommaso,
On Thu, May 12, 2022 at 01:04:55PM +0200, Tommaso Merciai via libcamera-devel wrote:
> On Thu, May 12, 2022 at 12:33:43PM +0200, Jacopo Mondi wrote:
> > On Thu, May 12, 2022 at 12:07:20PM +0200, Tommaso Merciai via libcamera-devel wrote:
> > > On Thu, May 12, 2022 at 10:43:51AM +0100, Kieran Bingham wrote:
> > > > Hi Tommaso,
> > > >
> > > > Quoting Tommaso Merciai via libcamera-devel (2022-05-12 10:31:07)
> > > > > Hi all,
> > > > > I'm trying to start to play with libcamera on PX30_Mini_EVB_V11.
> > > > > Can you give me some tips on build image with all libcamera dependencies
> > > > > for this type of SOC. Like buildroot Image or Yocto Image.
> > > >
> > > > libcamera is supported by buildroot, and as you've seen also by yocto. I
> > > > haven't followed the Yocto support, so I don't know who keeps it
> > > > updated, but I know buildroot received a patch to update to a quite
> > > > recent libcamera release in the last few days.
> > > >
> > > > > Actually I have compiled multimedia-libcamera-image with sdk using Yocto. I'm able
> > > > > to compile libcamera project with this. Could be a good starting point?
> > > > > Or you suggest another way?
> > > >
> > > > I would say 'yes', but you will likely want to be able to specify the
> > > > latest version of libcamera to build, and there may be more active
> > > > development ongoing and required for your platform, so you probably
> > > > don't want to 'wait' for someone to update the Yocto release. (Or you
> > > > could post the updates to the yocto project too).
> > > >
> > > > (Wanting to use the latest libcamera applies to buildroot too of course)
> > > >
> > > > --
> > > > Regards
> > > >
> > > > Kieran
> > >
> > >
> > > Hi Kieran,
> > > Thanks for your quick reply and your suggestion. Can you point me a good link to build a
> > > an image that support libcamera using buildroot?
> > >
> >
> > Alternatively, you can use the buildroot-built toolchain andsysroot to
> > build libcamera externally. Build your buildroot image as you would
> > regularly do, then you can clone and build libcamera externally using
> > a cross-file for meson, to instruct the build system to use the same
> > toolchain as the one you have compiled your rootfs with.
> >
> > The one I use looks like:
> >
> > --------------------------------------------------------------------------------
> > $ cat meson-cross-buildroot
> > [binaries]
> > c = '/home/build/buildroot/output/host/bin/aarch64-buildroot-linux-gnu-gcc'
> > cpp = '/home/build/buildroot/output/host/bin/aarch64-buildroot-linux-gnu-g++'
> > ar = '/home/build/buildroot/output/host/bin/aarch64-buildroot-linux-gnu-ar'
> > strip = '/home/build/buildroot/output/host/bin/aarch64-buildroot-linux-gnu-strip'
> > pkgconfig = '/home/build/buildroot/output/host/usr/bin/pkg-config'
> > cmake = '/home/build/buildroot/output/host/usr/bin/cmake'
> > qmake = '/bin/false'
> >
> > [properties]
> > needs_exe_wrapper = true
> >
> > [built-in options]
> > c_args = ['-D_LARGEFILE_SOURCE', '-D_LARGEFILE64_SOURCE', '-D_FILE_OFFSET_BITS=64']
> > c_link_args = []
> > cpp_args = ['-D_LARGEFILE_SOURCE', '-D_LARGEFILE64_SOURCE', '-D_FILE_OFFSET_BITS=64']
> > cpp_link_args = []
> >
> > [host_machine]
> > system = 'linux'
> > cpu_family ='aarch64'
> > cpu = 'cortex-a57.cortex-a53'
> > endian = 'little'
> >
> > $ meson build --cross-file meson-cross-buildroot
> > $ cd build; ninja
> > --------------------------------------------------------------------------------
>
> Hi,
> Thanks I'll try this way. At the moment I'm cross compiling libcamera
> using Yocto SDK with the following cmds:
>
> ---------------------------------------------------------------------------------------------------------------------
> source /opt/poky/4.0/environment-setup-armv8a-poky-linux
> export PYTHONPATH="/opt/poky/4.0/sysroots/armv8a-poky-linux/usr/lib/python3.10/site-packages/"
>
> meson --prefix=/targetfs --libdir=usr/lib --includedir=usr/include --datadir=usr/share --libexecdir=usr/libexec build
> ninja -C build install
> ---------------------------------------------------------------------------------------------------------------------
>
>
> output:
> ---------------------------------------------------------------------------------------------------------------------
> ...
> Build targets in project: 138
>
> libcamera 0.0.0
>
> Paths
> LIBCAMERA_DATA_DIR : "/targetfs/usr/share/libcamera"
> LIBCAMERA_SYSCONF_DIR : "/targetfs/etc/libcamera"
> IPA_PROXY_DIR : "/targetfs/usr/libexec/libcamera"
> IPA_CONFIG_DIR : "/targetfs/etc/libcamera/ipa:/targetfs/usr/share/libcamera/ipa"
> IPA_MODULE_DIR : "/targetfs/usr/lib/libcamera"
This doesn't look right, libcamera will look for IPA modules in
/targetfs/usr/lib/libcamera at runtime, while what you want is
/usr/lib/libcamera.
You should set the prefix to /usr, and install to the /targetfs
directory with
DESTDIR=/targetfs ninja -C build install
> Configuration
> Enabled pipelines : ipu3
> raspberrypi
> rkisp1
> simple
> uvcvideo
> vimc
> Enabled IPA modules : ipu3
> raspberrypi
> rkisp1
> vimc
> Tracing support : NO
> Android support : NO
> GStreamer support : YES
> Python bindings : YES
> V4L2 emulation support : NO
> cam application : YES
> qcam application : NO
> lc-compliance application: YES
> Unit tests : YES
>
> Subprojects
> gtest : YES
> pybind11 : YES
>
> User defined options
> Cross files : /opt/poky/4.0/sysroots/x86_64-pokysdk-linux/usr/share/meson/aarch64-poky-linux-meson.cross
> Native files : /opt/poky/4.0/sysroots/x86_64-pokysdk-linux/usr/share/meson/meson.native
> datadir : usr/share
> includedir : usr/include
> libdir : usr/lib
> libexecdir : usr/libexec
> prefix : /targetfs
>
> Found ninja-1.10.2 at /opt/poky/4.0/sysroots/x86_64-pokysdk-linux/usr/bin/ninja
>
>
> ninja: Entering directory `build'
> [17/388] Generating src/ipa-priv-key with a custom command
> ...........+....+.........+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*....+.+........+.+........+...+.........+......+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*..........+..+....+...........+.......+...+.................+...............+.+..+....+......+.....+....+...+.....+.....................+.+...+...+.....+.........+.............+.....+.+...........+.............+...+...+......+...............+........+.+..+...+.+.....+...+...+.......+..+...............+.+.....+.............+.....+.+........+................+...........+....+..+............+......+...............+....+...+.....+....+...+.....+..........+...+..+......+...............+......+...+.+.........+..+.........+.+...........+...+.......+...+..+....+........+......+..........+..+..........+...+...........+.+........+....+...+............+..+......+...+................+...........+...+.........+............+....+......+........+...+.......+.....+......+.+.....+.........+......+...+.+.........+............+..............+..........+.....+.+..............+....+...............+...........+.......+..+...............+.+......+...+...............+.....+......+......+.+..+.+............+.....+.............+..+...+......+......+.......+......+.....+.......+...+..+.......+...........+......+...+...+.........+.+.....+....+......+.....+...+......+...+...+.............+..+.......+.....+......+.+...+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> .+.+.....+..........+......+.....+...+.+...+..+....+.....+..........+..............+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*.........+..............+......+...+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*....+..+............+.+..+..........+..+...+......+.+...+......+..+.......+..+...+.+......+........+.......+...+...+...+..+...+....+..+.+..+.+......+.....+.+...+.....+.+...+.....+..........................................+...+..........+......+..+.............+.....+.+.....+......+....+.....+.........+............+............+...+.............+.........+...+...+..+...+......+...+.......+...........+...+......+..........+...+......+...........+......+....+...+......+.........+...+........+.+...+...+..+................+......+..............+.+.....+.+...+..+...+......+..................+.......+..................+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> [49/388] Generating src/libcamera/ipa_pub_key_cpp with a custom command
> writing RSA key
> [387/388] Installing files.
> Installing include/libcamera/ipa/core_ipa_interface.h to /targetfs/usr/include/libcamera/libcamera/ipa...
> ....
> ----------------------------------------------------------------------------------------------------------------------
>
> Could be also a valid solution or I'm wrong?
--
Regards,
Laurent Pinchart
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