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

DisplayPort MST Code Starts Lining Up For Linux 3.17, Other DRM Changes

Linux Kernel

Published on 08 July 2014 02:16 AM EDT
Written by Michael Larabel in Linux Kernel
2 Comments

The DisplayPort MST support code that's been in the works for several months is starting to land with the Linux 3.17 kernel that will be officially entering development stages next month.

David Airlie at Red Hat has started merging some of his DisplayPort Multi-Stream (DP MST) support code into his drm-next branch for eventual merging into Linux 3.17. David has been hacking on the code for several months and has basic DP MST working on Linux -- the Multi-Stream Transport support is for daisy-chaining multiple DisplayPort connections, as needed by some 4K displays and other setups, and for David's main Linux use-case is the technology is used by some recent Lenovo ThinkPad dock setups. David's testing has been mostly centered around a Haswell-class Lenovo ultrabook with MST-based dock for its external graphics.

The DP MST code has been under review by open-source developers and is starting towards the next stage of mainline integration. So far though for drm-next is the multi-stream helper code that was merged a few hours ago.

On a separate note, worth pointing out for another merge into drm-next is UDL vBlank support and UDL page-flip ioctl support. UDL is the DisplayLink open-source DRM driver for the USB VGA devices. Also worth noting is that universal planes are no longer experimental with this next kernel release cycle.

Stay tuned for more coverage of Linux DRM graphics driver improvements for Linux 3.17 in the weeks ahead.

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. CPUFreq Scaling Tests With AMD's Kaveri On Linux 3.16
  2. Enabling HyperZ Is Still An Easy Way For Faster RadeonSI Performance
  3. AMD Kaveri: Catalyst vs. RadeonSI Gallium3D On Linux
  4. Linux OpenCL Performance With The Newest AMD & NVIDIA Drivers
Latest Linux News
  1. Systemd 216 Piles On More Features, Aims For New User-Space VT
  2. Mesa 10.2.6 Has Plenty Of OpenGL Driver Bug Fixes
  3. Wasteland 2 Gets An Official Release Date
  4. Dead Island For Linux Appears Imminent
  5. LXQt 0.8 Is Being Released Soon
  6. Linux 3.17 Lands Memfd, A KDBUS Prerequisite
  7. Humble Jumbo Bundle 2 Shafts Linux Gamers
  8. Ubuntu 14.10's Feature Freeze Is This Wednesday
  9. New VM Software Claims To Be 4.5x Faster Than QEMU
  10. Kpatch Gets Exposure This Week, kGraft Misses Out
Latest Forum Discussions
  1. Dead Island for Linux (?)
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. AMD Offers Mantle For OpenGL-Next, Pushes Mantle To Workstations
  4. The dangers of Linux kernel development
  5. Next-Gen OpenGL To Be Announced Next Month
  6. OpenGL 4.5 Released With New Features
  7. Updated graphics drivers for Ubuntu 12.04 Precise LTS
  8. Builder: A New Development IDE Being Built For GNOME