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Downstream Track (D-vNN)

Identity

  • Canonical version label: D-vNN.
  • Legacy file label: vNN or downstream-vNN.
  • Kernel: LineageOS downstream Android kernel 4.19.325-cip128-st12-perf.
  • Package roots:
    • artifacts/wsl-pmaports/device-xiaomi-lmi/
    • artifacts/wsl-pmaports/linux-xiaomi-lmi/
  • Primary boot style: Android boot image with downstream DTB/overlay packaging.
  • Rootfs strategy: postmarketOS image stored in userdata with nested GPT loop partitions and 4096-byte rootfs image sectors.
  • Debug baseline: RNDIS USB networking and SSH at 172.16.42.1:22.

Distinctive Features

  • Proven rootfs discovery through /dev/loop0p2 as / and /dev/loop0p1 as /boot.
  • Uses the downstream CNSS/QCA CLD WLAN path, not mainline ath11k_pci.
  • Wi-Fi bring-up depends on stock Android firmware mounts, QRTR nameservice, vendor cnss-daemon, Android property shims, and read-only persist for wlan_mac.bin.
  • Keeps USB/RNDIS as the primary recovery and debug interface.

Progress

Version Feature / change Evidence Status
D-v27 Reproducible downstream boot/rootfs baseline with RNDIS and SSH. notes/archive-summary-2026-06-23.md; notes/repair-phase46-v27-post-reboot-stability-2026-06-23.md Verified persistent baseline.
D-v28 Hardware tools rootfs for display/audio/Wi-Fi/BT probes. artifacts/images/pmos-lmi-v28-hwtools-full-20260623.manifest Built; not the final hardware milestone.
D-v40 Android property shim for vendor cnss-daemon; QRTR nameservice gap identified. notes/wifi-bringup-live-2026-06-24.md Diagnostic step.
D-v41 Static qrtr-ns and vendor cnss-daemon start before WLAN trigger. notes/wifi-bringup-live-2026-06-24.md WLFW service connects; missing WLAN cfg path.
D-v42 Links WCNSS_qcom_cfg.ini; WLAN interfaces appear with fallback MAC. notes/wifi-bringup-live-2026-06-24.md Live WLAN scan succeeds, but MAC path incomplete.
D-v43 Mounts persist read-only and links wlan_mac.bin. artifacts/images/pmos-lmi-v43-downstream-wlan-mac-persist-full-20260624.manifest; notes/wifi-bringup-live-2026-06-24.md Verified Wi-Fi bring-up: wlan0, p2p0, wifi-aware0, scan success, crash_count=0.
D-v44 Service-status cleanup after Wi-Fi success. artifacts/images/pmos-lmi-v44-service-status-cleanup-full-20260624.manifest Built.
D-v45 CNSS status idempotence cleanup. artifacts/images/pmos-lmi-v45-cnss-status-idempotent-full-20260624.manifest Built.
D-v46 Daemon status idempotence cleanup. artifacts/images/pmos-lmi-v46-daemon-status-idempotent-full-20260624.manifest Latest downstream build artifact; no separate runtime verification found.

Current Downstream State

The strongest verified hardware milestone is D-v43: downstream Wi-Fi works well enough to create interfaces and scan. The latest downstream artifact is D-v46, which appears to be a cleanup build on top of that Wi-Fi path.

Open Work

  • Verify D-v46 on hardware if it is intended to replace D-v43.
  • Clean up OpenRC status reporting for lmi-qrtr-ns and lmi-cnss-daemon.
  • Decide NetworkManager MAC policy after the persist MAC path is stable.
  • Continue display, audio, Bluetooth, charging, sensors, and suspend work.

Safety Boundary

Do not write boot, vbmeta, super, dtbo, modem/EFS, calibration, or bootloader state from this track without a fresh exact approval. D-v43 was validated by writing userdata and temporary fastboot boot, preserving that boundary.