BFE Engineering
42fb386f60
Replace every em dash with real punctuation (rewrites, not hyphen swaps) in docs, code comments, scripts, configs, and the port records; convert en dashes, curly quotes, ellipsis glyphs, arrows, and section signs to ASCII; drop machine-writing tell phrases from living docs. ADR titles now use a colon. The M2 bring-up DTS model string carried an em dash into the patch series and its record echoes; fixed at both, and the full series re-verified to apply cleanly onto pristine 6.18.46. One comment in freshness.h deliberately names the em dash glyph the UI renders as the unknown mark; that is data, kept as prose naming it. Verified: cargo tests (sim, config-lint, rs485-bridge), shellcheck, both driver MC/DC harnesses, patches-apply.
44 lines
2.4 KiB
Markdown
44 lines
2.4 KiB
Markdown
# Overnight kernel-enablement run: results (2026-08-24 night -> 08-25)
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Goal: port/enable **every** remaining RV1106 hardware capability on the
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self-built Linux 6.18.46, open-source-first, verify on hardware, so the display's
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last mile can start in the morning. Runs on warden-c8a3 (`_b` slot = our 6.18).
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## Verified on hardware this run
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| Driver | Evidence |
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|---|---|
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| **AIC8800 wifi** (M5) | wlan0 up, `iw scan` found the site AP at -43 dBm + others. Modules (built-in deadlocks the two-stage SDIO bring-up). |
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| **TRNG** | `/dev/hwrng`, `rng_current=rockchip-rng`, real entropy. |
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| **OTP/nvmem** | `rockchip-otp0` reads chip id ("MR1"). |
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| **GMAC** (wired eth) | `eth0: Link is Up - 100 Mbps/Full`. |
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| **SARADC** | `iio:device0` reads 2 channels (adc-keys). |
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| **Audio** | card `rv1106-acodec`, `/dev/snd/pcmC0D0p`+`pcmC0D0c`. Audible test -> bench. |
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(These join the earlier-verified set: clk, pinctrl, GIC, timer, DMA, eMMC, uartx3,
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i2c, wdt, RTC, tsadc, RGA, USB host, PWM backlight. VOP display binds: connector
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is the morning task.)
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## Cross-cutting fixes made this run
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- **XZ compression** (`CONFIG_KERNEL_XZ`): the growing kernel overran U-Boot's
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DTB-at-0xc00000 load boundary (`Sysmem Error`, FLARE-AB fell to _a). zImage
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12.1->8.3 MB, ~4 MB headroom. See `kernel-618-btest-cycle` memory + wifi doc.
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- **Module vs built-in**: wifi must be modules (SDIO two-stage bring-up races the
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mmc probe when built-in: sequential initcall deadlock). Audio/GMAC/etc. are
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built-in and fine.
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- Hardened the c8a3 `_b`-test -> `_a`-recover cycle (compact-hex AVB serial write +
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readback while stable; Pi golden-env fallback for bootcount->loader).
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## Not done: deferred with reasons (see CAPABILITIES-AUDIT.md)
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mailbox (binds via rk3368 fallback but no client to exercise), crypto-v3 (CPU
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crypto extensions already cover it; 100 KB port), NPU (no open userspace),
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pvtm (DVFS-only). Camera/ISP/SPI: no hardware. **No unexplored capability gap.**
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## Morning (needs a human at the bench)
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1. **Display connector**: VOP binds + DRM card0 + panel probes, but no connector
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link yet; needs eyes on the panel (pixels can't be verified over serial).
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2. **Audible audio**: `speaker-test`/`aplay` through the acodec.
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3. Wifi **boot-time auto-load** (modules currently insmod'd by hand): a loader
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that inserts aic8800_bsp->fdrv(->btlpm) from the rootfs.
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Provenance: every ported driver is GPL-2.0 kernel source (`PROVENANCE.md`).
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