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kernel: RGA 2D accelerator ported (open-source vendor driver) — verified

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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
This commit is contained in:
BFE Engineering
2026-08-24 23:00:38 -06:00
co-authored by Claude Opus 4.8
parent 749f73568a
commit fda84b4c27
3 changed files with 33 additions and 1 deletions
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kernel/rv1106-enablement/DRIVER-PARITY.md
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@@ -36,7 +36,7 @@ c8a3, not just compiled.
| AIC8800 wifi (bsp/fdrv) | aic8800_* | **out-of-tree** | ⬜ M5 |
| AIC8800 BT (btlpm) | aic8800_btlpm | **out-of-tree** | ⬜ M5 |
| NPU (rknpu, ff660000) | rknpu, ff660000.npu | **out-of-tree** | ⬜ M6 — plan: `npu/PORT-PLAN.md` |
| RGA 2D (rga2) | rga2 | rockchip | ⬜ M6 |
| RGA 2D (rga2) | rga2 | ported (vendor char-dev) | ✅ /dev/rga, hw 3.3.87975 |
| I2S audio (i2s-tdm) | i2s | rv1126 fallback | 🔨 DAI built; needs acodec+card |
| FIQ debugger (ttyFIQ0) | fiq_glue | rockchip | ⬜ optional (we use ttyS2) |