This document resume some notes to start on contributing to the Linux Media Subsystem. Below some good references links from where to start:
- linuxtv.org
- patchwork
- media_stage
- sailus/media_tree
- git-trees
- IRC channel: #linux-media at irc.oftc.net
- build-script
Some development workflow notes:
git clone git://linuxtv.org/media_stage.git
git checkout -b tm/master/media_stage
Pull updates from remote man media_stage tree:
git remote update
git rebase origin/master
We take as reference the following repo:
https://gitlab.com/tomm.merciai/linux_media_stage
We can test the following repo to check some warning/erro on our dev tree doing the following.
Install required packages:
sudo apt-get install gcc-multilib g++-multilib libgmp-dev libmpfr-dev libmpc-dev \
make texinfo bison flex gettext pahole abi-dumper libssl-dev \
libelf-dev libsqlite3-dev python3-sphinx-rtd-theme dvipng \
meson libasound2-dev libjpeg-dev libudev-dev pkg-config libjson-c-dev \
libqt5opengl5-dev libsdl2-dev libbpf-dev clang doxygen emscripten \
rsync llvm clang libgtk-3-dev
Clone build-scripts repo:
git clone git://linuxtv.org/hverkuil/build-scripts.git
Then:
cp env.tmpl env.sh
Modify env.sh as following:
#!/bin/bash
# Copy this file to env.sh and update this information
# Your main git tree where you keep your in-progress work.
# This will be named 'main'.
myrepo=https://gitlab.com/tomm.merciai/linux_media_stage.git
# Optional: your local git tree where you do your development
# This will be named 'local', so to build a branch from your
# local tree, just specifiy that. E.g.: ./build.sh -test all local/branch
# mylocalrepo=/home/user/path-to-git-repo
# Your name (used in your Signed-off-by)
name="Tommaso Merciai"
# Your email (used in your Signed-off-by)
email="tomm.merciai@gmail.com"
Setup:
./cross.sh setup
./cross.sh all
./build.sh setup
Run test against your main dev branch:
./build.sh -test all main/tm/media_stage/v6.5.0/alvium_drv/v7
Create first a series:
$ git format-patch HEAD -N --subject-prefix="PATCH" --cover-letter -o patches/
If you are fixing first patch resend using v2..vN:
$ git format-patch HEAD -N --subject-prefix="PATCH vN" --cover-letter -o patches/
Then send the series using:
git send-email --cc-cmd='./scripts/get_maintainer.pl --norolestats <patch>' --cc <mail> ./patches/*.patch