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android / platform / external / libkmsxx / refs/heads/android13-mainline-go-os-statsd-release
commitf0687c8a10b3e371dbe09214db6664e37c283cca[log] [tgz]
authorRaman Tenneti <rtenneti@google.com>Sat Sep 18 05:45:02 2021 +0000
committerAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>Sat Sep 18 05:45:02 2021 +0000
tree2a349626debe337534905374d428e93e594fb813
parentbc9e7c2ee1987ab1af13723c933184919349faa3 [diff]
parent9f0739e4d9e9bc5a0effb00fc36716ba9543d221 [diff]
Remove external/libkmsxx/.gitmodules. am: 906a6c9a6a am: dffc424e7e am: 64b93dc17a am: f272118421 am: 9f0739e4d9

Original change: https://android-review.googlesource.com/c/platform/external/libkmsxx/+/1830607

Change-Id: I2d933d5065e18af05995ca00c6410a101188f273
tree: 2a349626debe337534905374d428e93e594fb813
  1. kms++/
  2. kms++util/
  3. kmscube/
  4. py/
  5. scripts/
  6. subprojects/
  7. utils/
  8. .clang-format
  9. .clang-tidy
  10. .gitignore
  11. .travis.yml
  12. Android.bp
  13. LICENSE
  14. meson.build
  15. meson_options.txt
  16. METADATA
  17. MODULE_LICENSE_MPL2
  18. OWNERS
  19. README.md
  20. TODO
README.md

Build Status

kms++ - C++ library for kernel mode setting

kms++ is a C++17 library for kernel mode setting.

Also included are some simple utilities for KMS and python bindings for kms++.

Utilities

  • kmstest - set modes and planes and show test pattern on crtcs/planes, and test page flips
  • kmsprint - print information about DRM objects
  • kmsview - view raw images
  • kmscube - rotating 3D cube on crtcs/planes
  • kmscapture - show captured frames from a camera on screen

Dependencies:

  • libdrm
  • Python 3.x (for python bindings)

Build instructions:

To build the Python bindings you need to set up the git-submodule for pybind11:

git submodule update --init

And to compile:

meson build
ninja -C build

Cross compiling instructions:

meson build --cross-file=<path-to-meson-cross-file>
ninja -C build

Here is my cross file for arm32 (where ${BROOT} is path to my buildroot output dir):

[binaries]
c = ['ccache', '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-gcc']
cpp = ['ccache', '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-g++']
ar = '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-ar'
strip = '${BROOT}/host/bin/arm-buildroot-linux-gnueabihf-strip'
pkgconfig = '${BROOT}/host/bin/pkg-config'

[host_machine]
system = 'linux'
cpu_family = 'arm'
cpu = 'arm'
endian = 'little'

Build options

You can use meson options to configure the build. E.g.

meson build -Dbuildtype=debug -Dkmscube=true

Use meson configure build to see all the configuration options and their current values.

kms++ specific build options are:

Option nameValuesDefaultNotes
pykmstrue, falsetruePython bindings
kmscubetrue, falsefalseGLES kmscube
omapenabled, disabled, autoautolibdrm-omap support

Env variables

You can use the following runtime environmental variables to control the behavior of kms++.

VariableDescription
KMSXX_DISABLE_UNIVERSAL_PLANESSet to disable the use of universal planes
KMSXX_DISABLE_ATOMICSet to disable the use of atomic modesetting
KMSXX_DEVICEPath to the card device node to use
KMSXX_DRIVERName of the driver to use. The format is either “drvname” or “drvname:idx”

Python notes

You can run the python code directly from the build dir by defining PYTHONPATH env variable. For example:

PYTHONPATH=build/py py/tests/hpd.py