1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Allwinner SoC Still Unlikely For Upstream Linux Kernel

Hardware

Published on 05 June 2013 09:27 PM EDT
Written by Michael Larabel in Hardware
20 Comments

While Allwinner ARM SoCs are found within massive amounts of the low-cost Android tablets manufactured in China, and there is some open-source Allwinner Linux kernel support, it's still unlikely that the patches will land upstream anytime soon.

A discussion started on the Linux kernel mailing list today entitled getting allwinner SoC support upstream. This isn't the first time a discussion has been had about upstream Allwinner System-on-a-Chip support in Linux, but the outcome appears the same.

The key hurdles in the Allwinner Linux support continue to appear as:

- Allwinner Technology still has no interest (or doesn't know how/care) to interact with the upstream Linux kernel development community. Without Allwinner as a company and their developers being interested in seeing their ARM SoC support mainlined in the Linux kernel, it's hard for their patches to advance in any substantive way and for future SoCs to be supported at the same time in upstream.

- Allwinner is using their own DeviceTree-like configuration system called "Fex" rather than DeviceTree. The Linux kernel has had DeviceTree in the mainline Linux kernel for years as a data structure and language for describing hardware specifics. Most ARM Linux hardware is now configured in a DeviceTree format while Allwinner appears happy with Fex. To upstream developers, they feel it's a case of Allwinner suffering from the "not invented here" syndrome or the company not being aware of DeviceTree. It's unlikely the upstream ARM developers will accept new ARM Linux support unless it's using DeviceTree.

- Right now the Allwinner Linux kernel patches are in the form of five nearly-identical drivers from the sun3i up through the sun7i. Most of the code is shared between all their SoCs so unless they were to unify this support, it's unlikely upstream developers will want to take on the extra weight.

Those are the three reasons right now. It's understandable that the Linux kernel developers don't want to budge on their stance in dirtying the kernel source tree with another configuration system and multiple copies of nearly-identical drivers, especially when it's for hardware where the vendor doesn't appear interested in upstream support or maintenance.

Until then, if you're using any low-cost Chinese tablets with an Allwiner A1X SoC, you'll need to continue using separate kernel trees/patches. Even with the out-of-tree status, the Allwinner Linux status is fairly thriving with distributions like Ubuntu and openSUSE being able to boot on them. Their current kernel is based on Linux 3.0 and can be found on GitHub. Other details on the Allwinner Linux happenings can be found at linux-sunxi.org.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  2. Sumo's Omni Gets Reloaded
  3. AMD A10-7800 & A6-7400K APUs Run Great On Linux
  4. Radeon Gallium3D Is Running Increasingly Well Against AMD's Catalyst Driver
Latest Linux Articles
  1. AMD's RadeonSI Driver Sped Up A Lot This Summer
  2. Intel's Latest Linux Graphics Code Competes Against OS X 10.9
  3. Intel Sandy Bridge Gets A Surprise Boost From Linux 3.17
  4. Open-Source Radeon Graphics Have Some Improvements On Linux 3.17
Latest Linux News
  1. GNOME/GTK+ Human Interface Guidelines Updated
  2. The Widely-Criticized New Commercial Linux Distro Is Now On Kickstarter
  3. CUDA 6.5 Is Doing Great For Blender
  4. Wayland & Weston 1.6 Alpha Released
  5. Nouveau Gets Improved Re-Clocking Handling For Select GPUs
  6. A New First-Person Mystery Game Might Be Coming To Linux
  7. Patch By Patch, LLVM Clang Gets Better At Building The Linux Kernel
  8. VC4 Gallium3D Driver Now Handles X With GLAMOR
  9. Opera 25 Development Release For Linux
  10. Steam Now Supports VA-API For In-Home Game Streaming
Latest Forum Discussions
  1. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs
  2. Systemd 216 Piles On More Features, Aims For New User-Space VT
  3. OSS radeon driver for A10-7850K (Kaveri)
  4. American Citizens running AMOK for food stamps
  5. What Linux Distribution Should Be Benchmarked The Most?
  6. Company I work for is looking to contribute to Open Source projects... but wrongly?
  7. Microsoft vs. Campaign
  8. Updated and Optimized Ubuntu Free Graphics Drivers