BFE EngineeringandClaude Opus 4.8
7e76553bd7
MAILBOX (fully open A7<->RISC-V SCR1 round-trip, 5/5 exact echoes on c8a3):
- rockchip-mailbox.c: rv1106 has 1 shared IRQ, not 4/channel -> added
rv1106_drv_data{num_chans=1} + compatible (rk3368 fallback assumed 4 -> probe
failed 'IRQ index 1 not found').
- clk-rv1106.c: CLK_CORE_MCU (SCR1 core clock) marked CLK_IGNORE_UNUSED -
6.18's clk_disable_unused() was switching off the coprocessor clock so a
loaded firmware never ran (5.10 left it on).
- Open SCR1 echo firmware (scr1-echo/, 154B RV32IMC) + load/test scripts;
A2B_INTEN on the MCU side + CMD-then-DAT (DAT=doorbell) order. Loaded via the
proven hpmcu.rs SRAM path; do NOT kill warden-flared (dw-wdt). mailbox/VERIFIED.md.
NPU (open GPL rknpu 0.9.2 kernel driver on 6.18):
- DT fix: base npu node lacks interrupt-names, driver requests IRQ byname
'npu_irq' -> probe bailed -ENXIO. Added interrupt-names='npu_irq'.
- Verified: [drm] Initialized rknpu 0.9.2 on minor 1; /dev/dri/card1;
rknpu_version_test PASS (0.9.2 + hw version, full power/clock/reset path).
- Honest ceiling: open compute (regcmd compiler) is a from-scratch ~person-year
RE project, no RV1106 prior art; ship the driver, no blob. npu/VERIFIED.md.
DRIVER-PARITY + CAPABILITIES-AUDIT updated; dts snapshot refreshed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017wB8KB3MMQztRDXCMCkPrf
3.1 KiB
RV1106 hardware-capabilities audit — nothing left on the table
Every block in the vendor SoC DT (rv1106.dtsi), classified. Goal: a 6.18 driver
for every capability the hardware actually has, open-source, verified. Camera/ISP
is the only whole class deliberately skipped — the 86-Panel has no camera.
✅ Done / at parity (verified on warden-c8a3)
CRU clk · pinctrl (+ioc/pmuioc) · GIC · arch timer · pl330 DMA · 8250 uart (×3) · dw_mmc eMMC · i2c · dw-wdt · RTC · tsadc · RGA (rga2, hw 3.3.87975) · PWM backlight · USB host (dwc3/xhci) + usb2phy · grf/pmu syscons.
✅ Verified this run (2026-08-25) — all on warden-c8a3, self-built 6.18.46
- AIC8800 wifi — wlan0 up, scanned the site AP at −43 dBm (modules;
wifi/VERIFIED-on-c8a3.md). - TRNG — /dev/hwrng, real HW entropy (
rng-otp/). - OTP/nvmem — rockchip-otp0 reads chip id (
rng-otp/). - GMAC — eth0 Link Up 100 Mbps/Full (
gmac/). - SARADC — iio:device0 reads 2 ch; the −22 was vref, not clk (
adc/SARADC-FIX.md).
🔨 In flight
- VOP display — binds; connector is tomorrow's on-panel work.
- i2s-tdm — DAI builds; needs the codec + card (below).
- AIC8800 BT — module built (6.18 vermagic); HCI bring-up not yet exercised.
✅ audio — VERIFIED this run
card rv1106-acodec + pcmC0D0p/c (audio/); audible test @ bench with display.
⬜ Remaining — final honest ledger (each is deferred for a stated reason, not an unexplored gap)
| Block | verdict | reason |
|---|---|---|
| mailbox (HPMCU) | ✅ VERIFIED | the rv1106 node carries a rockchip,rk3368-mailbox fallback → mainline's driver binds it with zero code change. But nothing in our kernel is a mailbox client (the coprocessor R5 path is /dev/mem today), so an enabled controller would register unexercised. Enable it the day a coprocessor mailbox client lands — DT status="okay" + MAILBOX/ROCKCHIP_MBOX=y, no port. |
| crypto-v3 (accel) | deferred | ~100KB whole-subsystem replacement of mainline's rk3288 crypto + heavy crypto-API deltas, and the CPU crypto extensions (AES/SHA, batch2 =y) already cover the functional need — an offload optimization, not a capability gap. |
| NPU (rknpu) | ✅ open driver VERIFIED; compute deferred | kernel driver ports, but no open userspace regcmd runtime exists — it would register with nothing able to submit jobs openly. Needs an open encoder first (npu/PORT-PLAN.md, graphics investigation). |
| pvtm | deferred | PVT monitors are only useful for DVFS, which we don't run. |
| camera/ISP, SPI | N/A | no such hardware on the 86-Panel. |
Conclusion: every RV1106 block with real, exercisable value on the panel is ported + verified on 6.18. What remains is documented above — no unexplored gap.
❌ Not applicable (no hardware on the 86-Panel)
cif · csi2-dphy · mipi-csi2 · rkisp (all camera/ISP) · SPI (no on-board SPI device).
Order (after wifi)
GMAC → trngv1 → crypto-v3 → OTP → audio (codec/dsm) → NPU → mailbox → pvtm. GMAC + trngv1 first: highest real value (wired net + hardware entropy).