Discover the latest DRM-Next updates for Linux 6.17, including TTM memory management optimizations, Intel i915 backlight control, and new AM65x OLDI bridge support. Learn how these changes impact GPU performance and kernel development.
Key DRM-Next Updates for Linux 6.17 Kernel
The DRM-Next pull request for the upcoming Linux 6.17 kernel cycle includes critical updates for graphics drivers and memory management. These changes, part of the drm-misc-next branch, feature:
TTM memory management eviction improvements (Intel-led optimizations)
Intel i915 driver now using backlight control helpers for eDP displays
AM65x OLDI bridge support added to the TIDSS driver
New display panel support for broader hardware compatibility
Why does this matter? These updates enhance GPU performance, power efficiency, and driver stability—key factors for developers and enterprises relying on Linux graphics stacks.
TTM Memory Management: Intel’s LRU Walk Consolidation
The TTM (Translation Table Maps) memory manager, used by multiple DRM drivers, has received significant optimizations. Intel engineer Thomas Hellström led the effort to:
Unify buffer object (BO) LRU walks – Reducing redundant code paths.
Implement
ttm_lru_walk_for_evict()– Aligning guarded iteration with driver-exposed methods.Add ticketlocking support – Improving thread safety in memory eviction.
"This is a deferred task from the Xe BO shrinker addition. We shouldn’t implement complex locking in two places." — Thomas Hellström
This refactor prepares TTM for future DRM-exec locking integration, simplifying kernel maintenance.
Intel i915 & TIDSS Driver Enhancements
1. Intel i915 eDP Backlight Control
The i915 driver now leverages backlight helpers for embedded DisplayPort (eDP), improving:
Power efficiency in laptops/tablets
Brightness consistency across hybrid graphics setups
2. AM65x OLDI Bridge Support (TIDSS Driver)
Texas Instruments’ TIDSS driver now supports AM65x OLDI bridges, enabling:
Better multi-display configurations
Enhanced automotive/industrial display pipelines
What’s Next for DRM-Next?
These changes will merge into Linux 6.17 once its kernel window opens. Expect further optimizations for:
AMD Radeon & NVIDIA Nouveau drivers
DisplayPort 2.1 readiness
TTM memory compression
FAQ: DRM-Next & Linux 6.17
Q: How do TTM eviction changes affect gaming performance?
A: Smoother VRAM management reduces stutter in memory-intensive workloads.
Q: Will these updates benefit ARM-based GPUs?
A: Indirectly—TTM improvements apply to all drivers using it (e.g., Panfrost, Lima).
Q: When will Linux 6.17 release?
A: Expected Q3 2024, following Linus Torvalds’ merge window.
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