Bug: 116741782

Clone this repo:
  1. f0687c8 Remove external/libkmsxx/.gitmodules. am: 906a6c9a6a am: dffc424e7e am: 64b93dc17a am: f272118421 am: 9f0739e4d9 by Raman Tenneti · 2 years, 5 months ago android13-d2-release android13-d3-s1-release android13-d4-release android13-d4-s1-release android13-d4-s2-release android13-dev android13-frc-adbd-release android13-frc-art-release android13-frc-cellbroadcast-release android13-frc-conscrypt-release android13-frc-odp-release android13-mainline-adservices-release android13-mainline-appsearch-release android13-mainline-go-adbd-release android13-mainline-go-adservices-release android13-mainline-go-appsearch-release android13-mainline-go-media-swcodec-release android13-mainline-go-mediaprovider-release android13-mainline-go-networking-release android13-mainline-go-neuralnetworks-release android13-mainline-go-odp-release android13-mainline-go-os-statsd-release android13-mainline-go-permission-release android13-mainline-go-resolv-release android13-mainline-go-scheduling-release 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aml_ads_331418080 aml_ads_331511020 aml_ads_331611190 aml_ads_331710270 aml_ads_331814200 aml_ads_331920180 aml_ads_340915050 aml_ads_341027030 aml_ads_341131050 aml_ads_341316030 aml_ase_331011020 aml_ase_331112000 aml_ase_331311020 aml_ase_340913000 aml_ase_341113000 aml_ase_341310010 aml_go_adb_330913000 aml_go_ads_330913000 aml_go_ads_330915000 aml_go_ads_330915100 aml_go_ase_330913000 aml_go_mpr_330912000 aml_go_net_330913000 aml_go_neu_330912000 aml_go_odp_330912000 aml_go_odp_330913000 aml_go_per_330912000 aml_go_res_330912000 aml_go_sch_330911000 aml_go_sdk_330810000 aml_go_sta_330911000 aml_go_swc_330913000 aml_go_tet_330914010 aml_go_tz4_330912000 aml_go_uwb_330912000 aml_go_wif_330911000 aml_hef_341114030 aml_hef_341311010 aml_rkp_341012000 aml_rkp_341015010 aml_rkp_341114000 aml_rkp_341311000 aml_tz4_331012000 aml_tz4_331012040 aml_tz4_331012050 aml_tz4_331314010 aml_tz4_331314020 aml_tz4_331314030 aml_tz4_331910000 aml_uwb_330810010 aml_uwb_331015040 aml_uwb_331115000 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  2. 9f0739e Remove external/libkmsxx/.gitmodules. am: 906a6c9a6a am: dffc424e7e am: 64b93dc17a am: f272118421 by Raman Tenneti · 2 years, 5 months ago
  3. f272118 Remove external/libkmsxx/.gitmodules. am: 906a6c9a6a am: dffc424e7e am: 64b93dc17a by Raman Tenneti · 2 years, 5 months ago android-s-qpr3-beta-1 android-s-v2-beta-3 android-t-preview-1 android-s-qpr3-beta-1 android-s-v2-beta-3 android-t-beta-3 android-t-preview-1 android-t-preview-2
  4. 64b93dc Remove external/libkmsxx/.gitmodules. am: 906a6c9a6a am: dffc424e7e by Raman Tenneti · 2 years, 5 months ago
  5. dffc424 Remove external/libkmsxx/.gitmodules. am: 906a6c9a6a by Raman Tenneti · 2 years, 5 months ago android-s-v2-preview-1 android-s-v2-beta-2 android-s-v2-preview-1 android-s-v2-preview-2

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