[libcamera-devel] libcamera starting point on px30 evk
Tommaso Merciai
tommaso.merciai at amarulasolutions.com
Thu May 12 13:25:53 CEST 2022
On Thu, May 12, 2022 at 02:08:22PM +0300, Laurent Pinchart wrote:
> 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
Thanks all for the tips :)
Regards,
Tommaso
>
> > 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
--
Tommaso Merciai
Embedded Linux Engineer
tommaso.merciai at amarulasolutions.com
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