DRM Graphics Changes For Linux 3.18 Might End Up Being Smaller
Written by Michael Larabel in Linux Kernel on 26 August 2014 at 01:57 AM EDT. 3 Comments
Handling merge requests for the DRM graphics driver updates will be done differently for the Linux 3.18 kernel, which will result in a few less weeks of development time.

David Airlie of Red Hat, the DRM subsystem maintainer, generally has been allowing new Direct Rendering Manager (DRM) code to be introduced to his drm-next tree up to around the time a given kernel release occurs. After that, within days, it could end up landing in the mainline Linux kernel when the merge window opens ahead of the next -rc1 release. David though is deciding to be a more strict about changes late in the cycle in hopes of leading to better tested code and less fallout from driver problems each kernel development cycle.

Just recently for Linux 3.17 there were two Intel GPU driver features that got reverted due to concerns by Linus Torvalds and it's not too uncommon for him to run into DRM problems. Linus has openly asked in the past what's wrong with the DRM crowd, DRM has been problematic with unbaked code, and expressed other frustrations.

Airlie announced on Monday, "I've been been getting too lax on when I merge stuff to drm-next and I think people are taking advantage of my good nature. So we are going to try something new this cycle, I'm going to use -rc5 of the current kernel as the cut off for major feature merges to the -next. That means that subsystem maintainers should have their -next trees to me by -rc5, with allowances with advance warnings up to -rc6, i.e. maintainer on holidays etc."

With Linux 3.17-rc2 having just been released, that means there's just about three weeks left until David will cut off the new material he's willing to have land within the DRM subsystem update for Linux 3.18.

Among the graphics changes to ideally look forward to so far for Linux 3.18 include AMD R600 UVD support, hopeful Nouveau re-clocking improvements, Radeon Userptr support, and various Intel graphics updates.
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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 Twitter or contacted via MichaelLarabel.com.

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