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 Benchmarking Platform
Phoromatic Test Orchestration

Finally: More DRM Driver Documentation

Linux Kernel

Published on 01 June 2012 04:09 AM EDT
Written by Michael Larabel in Linux Kernel
5 Comments

A developer while working to create a Renesas SH Mobile DRM driver ended up writing a fairly thorough DRM kernel framework documentation for those looking to write these kernel GPU drivers.

Linux and open-source in general seems to have a problem with lacking high-quality developer documentation, but for the open-source GPU drivers when it comes to DRM, X.Org, and Mesa/Gallium3D it's even worse. There isn't much documentation at all so developers are really just forced to dive into the code, figure out the APIs, and hope it all works out. Or at least base their driver off a simple driver to get started.

Laurent Pinchart while writing a Renesas DRM driver ended up writing a fairly thorough DRM framework guide. It doesn't provide 100% coverage of the kernel's Direct Rendering Manager, but it appears better than some of the limited documentation that has been written in the past.

To ensure the documentation doesn't get out of date, he proposes that any patch from a developer that changes the API must be accompanied by updated documentation or else it won't be merged.

Those wishing to look at the documentation can find it on the mailing list. While this document was published on Wednesday, two days later no other upstream DRM developers have commented on it...

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 News
  1. Fedora 22 Is Being Released Next Tuesday
  2. OpenWRT 15.05 Preparing Improved Security & Better Networking
  3. Using The New LLVM/Clang OpenMP Support
  4. Zapcc Claims To Be A "Much Faster C++ Compiler"
  5. Godot 1.1 Engine Release Brings New 2D Engine
  6. Intel VA-API Driver 1.6 Is Coming
  7. Canonical Is Reportedly Considering An IPO
  8. GNOME 3.18 - GTK3 Now Supports RandR 1.5
  9. Fedora 22 Risks Being Delayed Beyond Next Week
  10. Systemd 220 Has Finally Been Released
  11. LibreOffice 5.0 Beta 1 Released
  12. Allwinner Publishes New CedarX Open-Source Code
Latest Articles & Reviews
  1. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
  2. The State Of Various Firefox Features
  3. Intel Iris Graphics Performance With Mesa 10.6
  4. Fedora Workstation 22 Is Looking Great, Running Fantastic
Most Viewed News This Week
  1. The Linux 4.0 Kernel Currently Has An EXT4 Corruption Issue
  2. AMDGPU Open-Source Driver Code Continues Maturing
  3. Oculus Rift Suspends Linux Development To Focus On Windows
  4. Microsoft Open-Sources The Windows Communication Foundation
  5. LibreOffice 5.0 Open-Source Office Suite Has Been Branched
  6. Another HTTPS Vulnerability Rattles The Internet
  7. Linux 4.1-rc4 Kernel Arrives A Day Late
  8. Wayland / Weston 1.8 Release Candidate Arrives