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android / platform / external / libkmsxx / e6babe71612cdb5e8d75dfcb8ad97e54e92b596d
commite6babe71612cdb5e8d75dfcb8ad97e54e92b596d[log] [tgz]
authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>Thu Aug 06 05:18:02 2020 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>Mon Aug 10 09:44:48 2020 +0300
treeaf89594d448e70e8f43a9d2b8b64b30b25c3f817
parent97aba6dc55aebf9ee61b71985cecc0ae90af756b [diff]
dumbfb: Fix pitch for tri-planar formats

The BO pitches are unconditionally set to the frame buffer pitch, for
all planes. This is correct for semiplanar YUV formats, as they
subsample chroma horizontally by two but combined U and V in a single
plane, cancelling each other. For fully planar YUV formats, however, the
horizontal subsampling need to be taken into account to compute the
pitch. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
1 file changed
tree: af89594d448e70e8f43a9d2b8b64b30b25c3f817
  1. ext/
  2. kms++/
  3. kms++util/
  4. kmscube/
  5. py/
  6. scripts/
  7. utils/
  8. .gitignore
  9. .gitmodules
  10. .travis.yml
  11. Android.bp
  12. CMakeLists.txt
  13. LICENSE
  14. LTO.cmake
  15. README.md
  16. TODO
README.md

Build Status

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

kms++ is a C++11 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:

$ mkdir build
$ cd build
$ cmake ..
$ make -j4

Cross compiling instructions:

Directions for cross compiling depend on your environment.

These are for mine with buildroot:

$ mkdir build
$ cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE=<buildrootpath>/output/host/usr/share/buildroot/toolchainfile.cmake ..
$ make -j4

Your environment may provide similar toolchainfile. If not, you can create a toolchainfile of your own, something along these lines:

SET(CMAKE_SYSTEM_NAME Linux)

SET(BROOT "<buildroot>/output/")

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${BROOT}/host/usr/bin/arm-buildroot-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER ${BROOT}/host/usr/bin/arm-buildroot-linux-gnueabihf-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH ${BROOT}/target ${BROOT}/host)

SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

Build options

You can use the following cmake flags to control the build. Use -DFLAG=VALUE to set them.

Option nameValuesDefaultNotes
CMAKE_BUILD_TYPERelease/DebugRelease
BUILD_SHARED_LIBSON/OFFOFF
KMSXX_ENABLE_PYTHONON/OFFON
KMSXX_ENABLE_KMSCUBEON/OFFOFF
KMSXX_ENABLE_LIBDRMOMAPON/OFFOFF
KMSXX_PYTHON_VERSIONpython3/python2python3;python2Name of the python pkgconfig file

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