OPPO Kernel Craftsman

Nov 25, 2022 · Fundamentals

An Overview of Linux Direct Rendering Manager (DRM): History, Architecture, and Simple Example

Linux’s Direct Rendering Manager (DRM) replaces the legacy framebuffer by providing a kernel subsystem that unifies GPU and display control through libdrm, KMS, and GEM, tracing its evolution from 1999 DRI origins to atomic APIs, and illustrating usage via a step‑by‑step modeset example.