BFE EngineeringandClaude Opus 4.8
fda84b4c27
Ported the vendor multicore RGA char-dev driver (drivers/video/rockchip/rga3/, CONFIG_ROCKCHIP_MULTI_RGA) to 6.18 — WardenOS's librga uses /dev/rga, not V4L2. On warden-c8a3: rga2 probe successful, hw_version 3.3.87975, /dev/rga + /dev/dma_heap present. This is the CPU-savings 2D accelerator (LVGL UI offload). 6 mechanical 5.10->6.18 API fixes (platform remove->void, hrtimer_init-> hrtimer_setup, iommu_map* gfp arg, get_user_pages_remote vmas arg, MAX_ORDER compat, MODULE_IMPORT_NS string). CMA via the default 64 MiB pool + DMABUF_HEAPS_CMA (a custom linux,cma DT node hangs boot). Recipe + deltas in rga/PORT-DONE.md. All open source (vendor C source). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017wB8KB3MMQztRDXCMCkPrf
1.5 KiB
1.5 KiB
RGA port — DONE, verified on hardware (2026-08-24)
Ported the vendor char-dev RGA driver (drivers/video/rockchip/rga3/, the
multicore CONFIG_ROCKCHIP_MULTI_RGA driver — WardenOS's librga uses /dev/rga,
not V4L2) to 6.18. Open source (vendor C source). On warden-c8a3:
rga: rga2, irq = 55, match scheduler
rga: rga2 hardware loaded successfully, hw_version:3.3.87975
rga: rga2 probe successfully → /dev/rga present, /dev/dma_heap present
Build tree wiring
drivers/video/rockchip/{Kconfig,Makefile} created (source rga3/); wired into
drivers/video/{Kconfig,Makefile}. CONFIG_ROCKCHIP_MULTI_RGA=y.
&rga2 { status="okay"; }. For /dev/dma_heap/cma: use the kernel's default 64 MiB
CMA + CONFIG_DMABUF_HEAPS{,_CMA,_SYSTEM}=y — do NOT add a linux,cma DT node
(a mis-aligned/duplicate one hangs the boot at reserved-memory init).
5.10 → 6.18 API deltas fixed (all mechanical)
platform_driver.remove:int→void(rga_drv_remove, drop the returns).hrtimer_init(&t,…)+t.function=fn→hrtimer_setup(&t, fn, CLOCK_MONOTONIC, HRTIMER_MODE_REL)— the scheduler tick; verified under the live probe.iommu_map/iommu_map_sg: added the newgfparg (GFP_KERNEL).get_user_pages_remote: dropped the removedvmasarg.MAX_ORDER(removed) → compat#define MAX_ORDER (MAX_PAGE_ORDER + 1)inrga3/include/rga_drv.h(preserves the old exclusive semantics everywhere).MODULE_IMPORT_NS(<token>)→MODULE_IMPORT_NS("DMA_BUF")(string form).