NoahandClaude Opus 5
4a5481b6a5
The guard alone did not fix flare-edge#160: with dr_mode="otg" and the live re-init skipped, the controller still died 14s after carrier-on under load (carrier 54.1s, first Tx timeout 63.4s, HC died 68.4s). That means either the OTG event path is not the trigger, or the harm comes from somewhere else in it. dr_mode="host" removes far more than this one call: it also skips dwc3_otgregs_init() and hands port-power control to xHCI instead of the OTG block. IRQ 47 is shared between dwc3-otg and xhci-hcd, so /proc/interrupts cannot say whether OTG events fire at all. CONFIG_DYNAMIC_DEBUG is off, so dev_dbg is compiled out and invisible. So this build logs, ratelimited and always compiled: - every OTG hardware event with its OEVT value, role and restart flag - each time the guard skips a re-init on a live host Run under load, that answers whether the OTG path is even active during the failure window, instead of guessing a third patch. Also worth measuring: load accelerates this dramatically -- 452-587s idle versus 9-14s under line-rate traffic -- so idle soaks are not comparable to load tests and earlier comparisons need re-reading with that in mind. Refs flare-edge#160 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MVGTC78dgCGfRANNKjoPea
bfe-core1106-sdk
A modern, open development environment for the Luckfox Pico 86 Panel (Rockchip RV1106), replacing the vendor SDK, and honest about what runs on real silicon versus what is simulated.
| Vendor SDK | This repo | |
|---|---|---|
| Kernel | 5.10.160, twice-forked, frozen | 6.18.46: a reviewable, subsystem-split patch series onto pristine upstream; full peripheral set (display, touch, wifi, audio, NPU, ...) hardware-verified on a bench panel |
| Build | ~2 GB tree, absolute paths baked in, Kconfig options silently dropped | one hermetic script: sha256-pinned source fetch, fail-closed patch apply and config fragments |
| Off-device testing | none; every change means flashing a panel | register-level hardware models (sim/) plus a QEMU device VM booting the real kernel, real daemons, and the real UI with display + touch |
| Config safety | memory-map mistakes reach hardware (one bricked a bench unit) | static gates (tools/config-lint) catch them before any flash |
| CI | none | hosted pipeline: tests, coverage, benchmarks, patch-apply gate, kernel build with an in-CI QEMU boot smoke |
| Flashing tools | closed (upgrade_tool) |
open (rkdeveloptool) |
| License | mixed | GPL-2.0-only, with a per-driver provenance ledger |
Quick Start
Requirements: gcc-arm-linux-gnueabihf, qemu-system-arm, curl, cpio,
mkfs.ext4, a bare python on PATH (Debian/Ubuntu: python-is-python3),
gcc >= 14 (driver harnesses), and Rust (for the simulators' tests).
# 1. Build the kernel: fetch pinned pristine 6.18.46, apply patches/, emit
# zImage + rv1106-warden.dtb. WORK must sit outside any git checkout.
WORK=$HOME/kbuild-out CROSS_COMPILE=arm-linux-gnueabihf- bash build/build-kernel.sh
# 2. Boot it in the QEMU device simulator (no hardware needed):
bash qemu/mkinitramfs.sh
bash qemu/mkimage.sh
bash qemu/run.sh --kernel $HOME/kbuild-out/linux-6.18.46/arch/arm/boot/zImage --shell
# 3. Run the test suites:
for d in sim tools/config-lint qemu/rs485-bridge; do
(cd "$d" && cargo test)
done
for d in drivers/*/test; do make -C "$d" check; done # driver harnesses (gcc >= 14)
Add WARDEN_KCONFIG_FRAGMENT=qemu/configs/virt.fragment to step 1 for the
kernel variant with the simulator's extra devices; qemu/README.md has the
scenario tests (portal, OTA apply, display + touch, watchdog).
Layout
| Directory | Contents |
|---|---|
patches/ |
the RV1106 forward-port onto pristine linux-6.18.46, subsystem-split |
build/ |
hermetic kernel build: pinned fetch -> apply patches -> zImage + dtb; vendor.manifest pins the third-party trees this platform builds against (LVGL, the vendor RV1106 SDK) to exact commits, and fetch-vendor.sh obtains and verifies them |
qemu/ |
device simulator: QEMU -M virt boots the real kernel and real userspace |
sim/ |
register-level hardware models (Rust): membus, HPMCU, CRU, Modbus, RGA, NPU |
drivers/ |
hardened hardware-facing drivers: HAL seams, test harnesses |
kernel/ |
forward-port provenance and bring-up records (patches/ is canonical) |
tools/ |
config-lint (static memory-map gates) and dev tooling |
docs/ |
architecture, ADRs (decisions/), CI/CD |
Architecture
One thin hardware abstraction seam per block (a trait in Rust, a function
table in C): firmware logic talks to the seam; the seam binds a real backend
on the device or a simulated backend on the host. The driver test harnesses
measure against the same seam the simulator implements, so the two reinforce
each other. Full detail: docs/architecture.md.
| Simulator | Runs | Proves |
|---|---|---|
sim/ |
register-level Rust models | driver and supervisor logic, with fault injection |
qemu/ |
the real kernel + userspace on -M virt |
boot, init, daemons, networking, OTA, watchdog, display + touch |
lvglsim (downstream) |
the LVGL UI on SDL | rendering and UI flows |
With the production UI binary in qemu/payload/, run.sh --display on opens
the panel's 720x720 screen in a window, mouse clicks landing as touch:
device and UI in one VM. Emulation results are never on-silicon evidence;
the simulators narrow which claims need a panel.
Principles
- Open: open tools over closed ones; GPL-2.0-only.
- Hard: every seam has a fault-injection path; recovery code is tested against failure, not just success.
- Modern: the newest kernel the hardware can run, current toolchains, Rust for new host-testable code, reproducible builds.
License
GPL-2.0-only, repo-wide (LICENSE; a per-file SPDX identifier governs
where present). patches/ and kernel/ are derivative of the Linux kernel
and GPL-2.0 vendor code; per-driver origin is tracked in
kernel/rv1106-enablement/PROVENANCE.md. Contributions are accepted under
the same license (inbound = outbound).