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

A NVIDIA Tegra 2 DRM/KMS Driver Tips Up

NVIDIA

Published on 11 April 2012 10:50 AM EDT
Written by Michael Larabel in NVIDIA
6 Comments

Besides a binary driver update from the GeForce/Quadro camp coming out today, a basic DRM/KMS driver for NVIDIA's ARM-based Tegra 2 SOC has appeared this morning.

This Linux Direct Rendering Manager for the NVIDIA Tegra 2 is created by a third party (the German-based Avionic Design), but the main developer has been in contact with NVIDIA Corp and they "seem to be willing to work together on a solution that satisfies both their requirements and those of the community."

Thierry Reding of Avionic Design was the one that published the initial Tegra DRM driver to the DRI development list.
This series adds a basic DRM driver for NVIDIA Tegra 2 processors. It currently only supports the RGB output and I've successfully tested it against the fbcon kernel module and the xf86-video-modesetting driver. The code uses the Tegra's IOMMU/GART to remap non-contiguous memory. This means that currently video memory is limited to 32 MB, the size of the GART aperture.

Note that this is very early work-in-progress and there is a lot of room for improvement and cleanup. You'll also note that there is still a whole lot of debugging output, most of which is disabled by default.

However I explicitly wanted to post this early to get feedback and to discuss options on how to get this included in the mainline kernel. I have been in contact with some people at NVIDIA and they seem to be willing to work together on a solution that satisfies both their requirements and those of the community.

Thierry
So besides only supporting the Tegra 2 SoC right now and not the newer Tegra 3 or the original Tegra, it's un-accelerated at this point and only provides basic mode-setting support. For X.Org usage it's working with xf86-video-modesetting as the generic DDX driver that works with the generic Linux kernel KMS interfaces. However, at least NVIDIA's willing to work with the community for their Tegra Linux support, which is a much more open stance than the NVIDIA desktop side has been with Nouveau.

I've also heard some talk that there exists a form of the Nouveau driver that does work for Tegra, but haven't heard anything official come down via the Nouveau project or any concerted effort materialize.

Last week at the 2012 Linux Foundation Summit was when I heard NVIDIA might pursue a proper DRM/KMS driver for Tegra as from embedded customers there's been interest in possibly using Wayland, but right now their Tegra driver isn't compatible with this next-generation display driver. (However, for the GeForce driver there's no signs of change any time soon.)

It will be interesting to watch this DRM/KMS driver mature; let's just hope it reaches a mainline state quicker than the VIA DRM/KMS driver and its still out-of-tree state. This Tegra DRM driver now joins the Samsung Exynos and Texas Instruments OMAP as ARM SoC platforms with open Linux DRM drivers. As I've been hinting at on Twitter, another noteworthy open-source GPU code drop is expected this week and it's unrelated to Tegra, so stay tuned to Phoronix.

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. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  2. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  3. OCZ Vector 150 SSD On Linux
  4. Noctua i4 CPU Cooler: Great For Cooling High-End LGA-2011v3 CPUs
Latest Linux Articles
  1. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  2. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  3. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
  4. 6-Way Winter 2014 Linux Distribution Comparison
Latest Linux News
  1. Jolla's Sailfish OS Update 10 Is Now Available
  2. HP To Launch Linux++ Operating System Next Year
  3. Civilization: Beyond Earth Launches For Linux
  4. NIR Has Been Revised As A New IR For Mesa
  5. New 64-bit Linux Kernel Vulnerabilities Disclosed This Week
  6. PostgreSQL 9.4 Brings JSONB & Many Other New Features
  7. That Nasty Linux Kernel Lockup Bug Is Still Unresolved
  8. KDE's Krita Loses Its Main Backer
  9. Inline Data Support Comes To CephFS With Linux 3.19
  10. VC4 Gallium3D Adds DMA-BUF Support, Yields Working DRI3
Latest Forum Discussions
  1. Bench specific mount point
  2. XLennart: A Game For Systemd Haters With Nothing Better To Do
  3. Tool for measuring FPS in games
  4. Need some hand holding with upgrading xserver
  5. Ubuntu Developers Still Thinking What To Do About Adobe Flash Support
  6. Microsoft buying Mojang
  7. Updated and Optimized Ubuntu Free Graphics Drivers
  8. Premium subscription "login" times out much faster than forum