Graphics: A Frame's Journey
summary
Modern Linux display pipelines are broken into DRM/KMS for timing and output, Wayland for multiplexing, and GL/Vulkan + EGL/WSI for rendering, with dma-buf for buffer sharing; GBM isn't "Generic Buffer Manager". Atomic mode-setting exposes a test-only interface and drivers are often probed 50+ test commits per frame to brute-force valid configs. fbdev is obsolete, GPUs are extremely parallel but power-hungry and costly for short bursty work, and practical tools include KMS quads, kmscube, drm_info, wayland-info and wl_hacks.
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chapters (6)
- 0:00Start
- 12:59DRM/KMS basics
- 22:04KMS dumb buffers
- 23:12DRM/KMS runtime use
- 25:39Wayland basics
- 37:23EGL & OpenGL (ES) basics
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