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bfe-core1106-sdk/kernel/rv1106-enablement/DRIVER-PARITY.md
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BFE EngineeringandClaude Fable 5 973a414f07 review: iteration-2 fixes (fragment assertion, evidence paths, hardening)
- build-kernel.sh fragment assertion: survives a missing trailing newline
  (the read footgun, reproduced) and treats an absent symbol on a disable
  line as FATAL, symmetric with the enable arm.
- fetch-kernel-tarball.sh checks the pin before downloading; both fetchers
  add --retry-connrefused.
- mkimage rejects '.'/'..' state keys.
- ui-shot: VM liveness checked before every QMP call, console.log preserved
  as evidence on every failure path, repaint deadline widened to 90s with
  the contended-runner rationale documented.
- rs485-bridge: overflow discards back off one gap and rate-limit their log
  line, mirroring the accept-loop fix; clippy nit fixed.
- .gitignore ignores *.elf/*.map so the untracked artifacts cannot silently
  return; CI shellcheck glob now covers build/ and the rootfs boot scripts
  (directives added for the deliberate in-guest source paths).
- Docs: NPU parity row matches its sibling verification docs; line-pinned
  audit cross-references unpinned; CROSS_COMPILE documented in the build
  header; payload README lists warden-ui; ci-cd tense settled.

Verified: guards negative-tested (bad state keys, no-newline fragment);
boot smoke, portal scenario, ui-shot all PASS; 53 tests green; shellcheck
clean across the widened glob; clippy zero.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018HUayid7W5w7jBdb9Rrj1K
2026-08-30 08:34:47 -06:00

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# RV1106 6.18 driver parity vs the 5.10 vendor kernel
Goal: every driver the panel's 5.10 kernel runs must work at ≥ parity on our
self-built 6.18. Source of truth = the running 5.10 system on warden-c8a3
(`lsmod` + `/proc/interrupts`, captured 2026-08-24). Verify each on hardware via
the A/B `_b`-slot loop (`../docs/m2-boot-on-c8a3.md`); [x] means confirmed on
c8a3, not just compiled.
| Driver / node | 5.10 evidence | mainline? | 6.18 status |
|---|---|---|---|
| CRU clock (clk-rv1106) | — | ported | [x] M2 |
| pinctrl-rockchip (rv1106) | — | ported | [x] M2 |
| GIC-400 / arch_timer | arch_timer | mainline | [x] M2 |
| dw_mmc (eMMC) | dw-mci | mainline | [x] M3 |
| 8250 uart2 (console) | ttyS2 | mainline | [x] M2 |
| GPIO (rockchip, ×5 banks) | gpio-rockchip | mainline | [x] batch1 (chips 04) |
| DMA (pl330, ff420000) | ff420000.dma-controller | mainline | [x] batch1 |
| uart1 / uart4 | ttyS1, ttyS4 | mainline | [x] batch1 |
| I2C (dw-apb, ff460000=i2c3) | ff460000.i2c | mainline | [x] batch1 (i2c-3) |
| watchdog (dw-wdt, ff5a0000) | ff5a0000.watchdog | mainline | [x] batch1 (watchdog0) |
| tsadc thermal (ff3c8000) | rockchip_thermal | ported (data+init+macros) | [x] soc-thermal reads 39.8°C |
| SARADC (ff3c0000) | ff3c0000.saradc | ported (2-ch v2 data) | [x] iio:device0 reads 2ch (adc-keys); fixed -22 via vref-supply |
| TRNG (rng@ff448000) | rockchip,trngv1 | mainline (rk3588 IP) | [x] /dev/hwrng, real entropy (`rng-otp/`) |
| OTP/nvmem (ff3d0000) | rockchip,rv1106-otp | ported (px30_otp_read) | [x] rockchip-otp0, reads chip id |
| GMAC (ffa80000) | rockchip,rv1106-gmac | ported (dwmac-rk rv1106_ops) | [x] eth0 Link Up 100M/Full (`gmac/`) |
| GPIO_SYSFS (legacy /sys/class/gpio) | — | mainline (config) | [ ] goodix script needs it |
| PWM (rockchip) | — | mainline (=m) | [ ] batch2 =y (backlight) |
| RTC (rv1106-rtc) | — | ported (vendor driver) | [x] /dev/rtc0 registers + reads |
| USB2 phy (inno, rv1106) | rockchip_usb2phy_* | ported (data, no tuning) | [x] probes → USB up |
| USB host (DWC3→xhci, ffb00000) | xhci-hcd:usb1 | mainline | [x] xhci host registered |
| USB OTG gadget (DWC3, eth0) | eth0 | mainline dwc3 | [wip] host works; eth0 needs dr_mode=peripheral |
| crypto (aes/ccm/ctr/arc4) | modules | mainline | [ ] batch2 (config =y) |
| PSCI node (removed) | — | — | [x] deleted (no secure monitor → SMC fault) |
| VOP display (ff990000) | ff990000.vop | ported (rv1126 sibling) | [wip] binds+DRM+card0; connector WIP |
| PWM backlight (pwm1) | — | mainline (rk3328 fallback) | [x] backlight up (brightness) |
| RGB666 720×720 panel | — | panel-dpi | [wip] probes; bus_format + connector WIP |
| GT911 touch (goodix) | goodix, gt911 | mainline | [ ] M4 (needs GPIO_SYSFS [x] + node) |
| GPIO_SYSFS / crypto / CFG80211 | — | mainline (config) | [x] =y (batch2) |
| AIC8800 wifi (bsp/fdrv) | aic8800_* | **out-of-tree** | [x] M5 — wlan0 up, scanned the site AP at 43dBm (modules, `wifi/VERIFIED-on-c8a3.md`) |
| AIC8800 BT (btlpm) | aic8800_btlpm | **out-of-tree** | [wip] module built (6.18 vermagic); HCI bring-up not yet exercised |
| NPU (rknpu, ff660000) | rknpu, ff660000.npu | **out-of-tree** | [x] open GPL driver VERIFIED on hardware — `/dev/dri/card1`, `rknpu_version_test` PASS (power/clock/reset path exercised); open *compute* (regcmd) remains a from-scratch RE project (`npu/VERIFIED.md`, `npu/OPEN-NPU-PLAN.md`) |
| RGA 2D (rga2) | rga2 | ported (vendor char-dev) | [x] /dev/rga, hw 3.3.87975 |
| I2S audio (i2s-tdm) | i2s | rv1126 fallback (=y) | [x] cpu DAI registers (part of the card below) |
| Audio codec (acodec) | rockchip,rv1106-codec | ported (rv1106_codec.c) | [x] card `rv1106-acodec`, pcmC0D0p/c (`audio/`); audible test @ bench |
| HPMCU mailbox (ff5c0000) | rockchip,rv1106-mailbox | rk3368 fallback +rv1106 num_chans=1 | [x] A7<->SCR1 round-trip, 5/5 exact (`mailbox/VERIFIED.md`) |
| PVTM (core+pmu ring-osc) | rockchip,rv1106-*-pvtm | ported (vendor, no mainline) | [x] both probe; debugfs reads (`pvtm/`) |
| FIQ debugger (ttyFIQ0) | fiq_glue | rockchip | [ ] optional (we use ttyS2) |
Legend: [x] verified on hardware · [wip] built, not yet verified · [ ] not started.