LCU13: Collaborating with other Android communities

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Resource: LCU13
Name: Collaborating with other Android communities
Date: 31-10-2013
Speaker: Bernhard Rosenkranzer

Published in: Technology
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LCU13: Collaborating with other Android communities

  1. 1. Other Android community projects Bernhard “Bero” Rosenkränzer, LCU 2013
  2. 2. www.linaro.org • The semi-open nature of Android releases has caused numerous communities to create their own builds and forks • There's currently not enough communication between the various communities – something we may want to try to fix • For each community we're talking about, I'm going to list what we may want from them, not so much what they may want from us – because that's the same in every case: optimizations, support for newer toolchains, etc. • Let's start with an overview of important projects: Other Android community projects
  3. 3. www.linaro.org • Main focus: improvements for running Android on ARM • Adds and improves support for various development boards (e.g. Panda, Origen, Arndale), Vexpress, FastModels – also runs on Nexus devices • Adds ARM specific improvements, such as faster string handling routines in Bionic • Adds generic improvements, such as support for newer toolchains, optimizations that aren't specific to ARM such as sincos() in Bionic • Provides a development environment (gcc/make/... on Android) Linaro Android
  4. 4. www.linaro.org • Main focus: improvements for running Android on x86 • Adds and improves support for x86 based development boards and reference devices • Adds x86 specific optimizations • Adds generic improvements such as Ethernet support, automatic kernel module loading (this will become relevant to us with better single zImage support – definitely on ARMv8) • Temporarily suspended because of merge with an internal Intel Android project 01.org
  5. 5. www.linaro.org • Ethernet support (improved version of the Ethernet Connection Manager we already include) • Automatic kernel module loading – Upstream Android wants to kill kernel modules – But that's a bad idea™ as soon as we're talking about supporting any hardware that isn't guaranteed to remain constant (Aarch 64 boxes with PCI/PCI-E slots, development boards that have USB ports, ...) • Optimizations that aren't specific to x86 01.org – things we may want to copy
  6. 6. www.linaro.org • Main focus: running Android on generic x86 PCs • Adds and improves support for x86 devices • Adds/improves support for PC type hardware such as mice, mouse wheel, external monitor/storage/keyboard/... • Adds an installer android-x86.org
  7. 7. www.linaro.org • Improved mouse support etc. is relevant for all non- touchscreen devices • Installer may become relevant if ARM devices manage to move into the generic computing space currently dominated by x86 android-x86.org – things we may want to copy
  8. 8. www.linaro.org ● Main focus: Support as many phones and tablets as possible, generic improvements ● Currently supports 212 devices officially, more than 50 other devices supported unofficially ● Theming support, FLAC codec support, OpenVPN client, CPU overclocking support, interface modifications ● Assorted optimizations, including Linaro's string handling routines, support for Linaro toolchains (copied from Linaro Android) cyanogenmod.org
  9. 9. www.linaro.org ● Device support would be nice to get more testing... ● Optimizations that affect ARM devices (and aren't copied from our tree in the first place) cyanogenmod.org – things we may want to copy
  10. 10. www.linaro.org ● Main focus: Being 100% Free/Open Source Software ● Removes all non-free components (even if it means losing functionality) and replaces them with free alternatives where possible Replicant
  11. 11. www.linaro.org ● Free replacements for components that provide all needed functionality – e.g. the Galaxy Nexus RIL layer may be interesting Replicant – things we may want to copy
  12. 12. www.linaro.org ● Various chipset makers and handset makers make branches of Android optimized for their devices available, e.g. – Sony: http://developer.sonymobile.com/knowledge-base/open-source/android-open- source-project-for-xperia-devices/ – Samsung: http://opensource.samsung.com/ – Allwinner: https://github.com/allwinner-dev-team – Qualcomm: https://www.codeaurora.org/patches/quic/la/ – Insignal (Arndale): http://git.insignal.co.kr/ – Freescale: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=IMXANDROID – ... Vendor branches
  13. 13. www.linaro.org ● Most vendor branches are a mess – often with hundreds if not thousands of patches applied on top of an old release of AOSP ● But they often contain some very generic optimizations and bugfixes that should be upstreamed... ● Essentially, what Linaro does for the kernel would be needed here... But our Android team is nowhere near the size of the landing teams and most owners of vendor branches aren't our members Vendor branches – things to copy
  14. 14. www.linaro.org ● We should find ways for many if not all of the communities to work together and share generally useful work ● A combined effort may be better at attracting upstream attention The future
  15. 15. connect.linaro.org

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