Y2LINUX-GPU-01 — manual deployment receipt

> **Historical record.** The dates, candidate identity, "current" claims, > next steps and permissions below belong to this recorded boundary. See > [current state](../CURRENT_PLATFORM_STATE.md) for the latest physically observed result.

Owner deployed; hardware rendering passed, deep suspend failed qualification. Source commit 7c43557a38fac6bbdb0ab5628cffe131ebda6360. One integrated BOOTIMG/Y2ROOT candidate is at /home/luca/Dokumente/Code/Y2Linux/out/y2linux-gpu-01. The assistant has not flashed it. GPU #34 stays open; Y2Linux is not yet ready to begin Reborn. Physical result and targeted suspend corrections. The table below preserves the pre-deployment receipt; its pending identity fields are resolved by that evidence. GPU-01 image bytes/hashes are unchanged.

The pre-deployment fallback baseline was CONNECTIVITY-10 with CONNECTIVITY-07 root, accepted M4, and preserved Y2DATA. The owner keeps remaining M5 connection/audio tests pending. Reborn and M6/OTA implementation are outside this candidate.

Required platform receipt

Item	GPU-01 implementation / evidence / remaining physical gate
1. Source	`7c43557a38fac6bbdb0ab5628cffe131ebda6360`; identical kernel/root build receipts.
2. Exact GPU	Mali-400 MP2: own stock GP, L2, two active PP cores and three MMU resources, reconciled with the actual Y2 stock kernel.
3. Revision	Not yet read. GPU is off on CONNECTIVITY-10. Normal Lima probe and `y2-gpu-check` will print GP/PP version registers; no revision is invented. MMU behavior/self-tests will be recorded; no separate MMU revision register is established.
4. MMIO	GPU `0x13010000/0x10000`: GP +0, L2 +0x1000, GP MMU +0x3000, PP0/1 MMU +0x4000/+0x5000, PP0/1 +0x8000/+0xa000. MFGCFG gate `0x13000000/0x10`. Existing SPM `0x10006000`, domain control +0x214.
5. IRQs	GIC hwirq 202–207 / DT SPI 170–175, active-low: GP, GP-MMU, PP0, PP0-MMU, PP1, PP1-MMU. Existing sysirq owns polarity.
6. Clocks	Existing CCF: MMPLL → MFG selector 1/top gate bit 23 at TOPCKGEN +0x50 → G3D MFGCFG bit 0. Bus uses existing `mm_smi_common`; its inherited rate remains unresolved, without retuning.
7. Reset/domain	Existing sole SPM owner exports MFG genpd. Stock dual power ACK, clock isolation, domain reset and SRAM ACK sequence. Source clock spans the entire domain transition; Lima owns G3D usage. No independent guessed reset or duplicate register owner.
8. Frequency	One inherited 500.5 MHz register-derived rate, nominal stock 500 MHz. This Y2's retained LK devinfo[3] bit 19 is physically 0, selecting the stock MMPLL branch. No PLL retuning, overclock or guessed DVFS table. Other loader PLL/mux states fail activation.
9. Voltage	Preserve inherited supply. No established dedicated GPU regulator; no `mali-supply` or voltage/OPP write. Stock profiling's nominal 1.2 V is not a measured rail voltage.
10. Kernel/Lima	Linux 6.18, `CONFIG_DRM_LIMA=y`, `DRM_GEM_SHMEM_HELPER=y`, `DRM_SCHED=y`, `PM_GENERIC_DOMAINS=y`, `PM_GENERIC_DOMAINS_OF=y`, `PM_GENERIC_DOMAINS_SLEEP=y`. Standard `arm,mali-400` binding with `mediatek,mt6582-mali`. Small Lima probe PM-reference fix enables initial idle.
11. Mesa	24.0.9, pinned by Buildroot 2025.02.17 and source hashes.
12. Mesa Lima	Actual Meson `gallium-drivers=[lima,kmsro]`, `llvm=disabled`, `osmesa=false`, `vulkan-drivers=[]`; no software rasterizer.
13. EGL	`egl=enabled`, GBM platform selected through the standard EGL extension/API. Actual EGL vendor/version/config ID await the hardware run.
14. GLES	`gles1=enabled`, `gles2=enabled`; qualification explicitly creates GLES 2.0. Exact GL version/renderer/extensions and texture limits await GPU-01.
15. GBM/libdrm	`gbm=enabled`, libdrm 2.4.124, ARM hard-float. `glx=disabled`, no X11/Wayland desktop platforms. Actual `lima_dri.so` and `mediatek_dri.so` installed.
16. Memory/MMU	Lima GEM/shmem, standard DMA/PRIME, 32-bit DMA contract and `[0,2^32)` GPU VA, 4-KiB MMU pages; noncoherent ARM DMA API. No GPU carveout, CMA addition or changed RAM exclusions. KMS scanout needs small contiguous buffers; large allocations/fragmentation limits remain physical measurements.
17. Presentation	Existing Mediatek KMS allocates linear XRGB8888 scanout; Mesa kmsro exports dma-buf and Lima imports/renders into it. Native 480×360, one outstanding page flip, completion before buffer reuse. No CPU presentation copy. Physical sharing/presentation is still a qualification gate.
18. Runtime PM	Mainline Lima 200-ms autosuspend and job lifetime references; G3D gate then MFG domain off, source gated only after ACKs. Initial no-client idle is requested. ACK faults are bounded and refuse unsafe GPU access without a global reboot.
19. Suspend	Lima force-suspend/resume plus genpd; quiesce jobs before existing M4 deep suspend. Test live static EGL context, then no-client suspend, same-session wake and rendering again. Existing charging suspend policy remains authoritative.
20. Buildroot changes	Add Mesa Lima/kmsro, EGL/GLES/GBM and `y2-gpu-check`/`y2-gpu-collect`; retain connectivity, ALSA and existing production services. Libraries/tools are in Y2ROOT; kernel/DT/display module are in BOOTIMG. No OTA implementation.

Hardware detail, source provenance, license policy and provisional Reborn API: production GPU contract. The physical clock/bin capture did not power the GPU. Its read-only observation modules left only external-module taint 4096 in the earlier inspection boot. Owner-deployed GPU-01 starts with taint 0.

21–24. Images, preservation and fallback

Paths below are relative to /home/luca/Dokumente/Code/Y2Linux/out/y2linux-gpu-01.

Role	File	Bytes	SHA256
New BOOTIMG	`BOOTIMG.img`	6203392	`c8a27f021ddea92ffb9e97beaa3c327c53f1141b2d7e47d8f63060ea7c02adce`
New Y2ROOT	`Y2ROOT.img`	536870912	`b4a57fe7defd1132ab635d5496076df80e8af2880ebe04eb32282213bf44a5cf`
CONNECTIVITY-10 fallback BOOTIMG	`fallback/BOOTIMG.img`	6150144	`d7fbb0808db953a7c8d26f3846815b7b5fbc67caa1b86248d7f992dba51f30a7`
CONNECTIVITY-07 fallback Y2ROOT	`fallback/Y2ROOT.img`	536870912	`c5031c2e87e02258d9da16a424ba727001d367ce76aa3366b5c70f6bef2d68fd`

Y2DATA is preserved in place. No Y2DATA image, formatting, seed or migration is provided. USRDATA is unchecked with filename NONE. Wi-Fi preferences, Bluetooth bonds, machine/radio identity and user files retain their existing storage. Retained data metadata describes the existing layout/template contract, not a claim that mutable live data equals its original seed hash.

The fallback pair is the established CONNECTIVITY-10/07 physical baseline; restoring these exact copies remains an operator action, not a newly tested rollback. Both fallback images use their own preserving scatter. No prior image is overwritten. Original FM/M4 recovery artifacts remain where retained.

Host validation

Linux ARM build and emitted BOOTIMG/rescue/DT/kernel bounds passed.
92 regression tests passed (56 production/core/storage/audio + 36
power/connectivity/GPU), including domain ACK fault injection and emitted DT IRQ/MMIO/reservation mutation rejection; no skipped GPU DT test.
dtschema 2026.6 validates the patched Lima binding and the emitted GPU
node. DTB SHA256: c988d2d9316ca3cb8529ae39e576c502d0d2b2f373acc2667c9ea86282b69c6b.
ARM/QEMU checks passed for the renderer's dynamic linking, help and bounded
arguments, telemetry shell syntax and existing ABI/ALSA tools. These are not hardware EGL/rendering results.
Package/root validation passed: clean ext4, label/UUID, new graphics ARM ELF
and hard-float ABI, raw ext4/tar agreement, no software renderer, preserved radio/SSH identity paths, exact fallback bytes and preserving scatter.
9 isolated package rejection cases passed, covering data payload/selection,
schema/identity reset, protected writes, source mismatch, fallback lies and unestablished firmware redistribution. All package hashes verify.

Detailed build receipts distinguish these host results from the still-pending physical milestone. Graphics license/source receipts are also shipped under metadata/graphics-licenses.

25. Exact manual installation

Check the package on the host:

   cd /home/luca/Dokumente/Code/Y2Linux/out/y2linux-gpu-01
   sha256sum -c SHA256SUMS

Shut down the Y2 by the established owner procedure. Use the previously
proven SP Flash Tool v5.2032.00 and matching MTK_AllInOne_DA.bin, with the established USB/power entry sequence.
Load this package's MT6582_preserve_data_scatter.txt and select
Download Only. Review the rows after loading:

SPFT row	Selection	File
BOOTIMG	checked	package `BOOTIMG.img`
ANDROID	checked	package `Y2ROOT.img`
USRDATA and every other row	unchecked	NONE

Keep PRELOADER, partition tables, protected/calibration partitions, LK, recovery and media unchecked. No Format, Firmware Upgrade or raw address entry. Use the unchanged scatter coordinates and raw image files.

Perform the manual Download operation, then boot normal Linux. This updates
both BOOTIMG and Y2ROOT; do not mix GPU-01 with the old root. Keep the existing initialized Y2DATA. No SD installation or data reset is needed.
Report “GPU-01 running”. The expected kernel is
6.18.0-y2linux-gpu-01, root marker /etc/y2linux/build-id is Y2LINUX-GPU-01, and existing SSH authorization/host identity is preserved. Qualification proceeds over the existing pinned connection after that report.

If a fallback is needed, load fallback/MT6582_preserve_data_scatter.txt in Download Only and select only its BOOTIMG and ANDROID files. Preserve USRDATA and all other rows exactly as above. A green SPFT result is transport evidence, not a claim of GPU qualification.

26. One coherent physical qualification

After the owner reports deployment, use the ordered procedure in the GPU contract:

Record markers, boot ID, taint, Lima GP/PP revisions, MMU/L2 probe, render node
and initial no-client idle. Check both MFG power bits and clock references.
Run y2-gpu-check --seconds 20; record EGL/GL identity, hardware Mali renderer,
actual EGL config/texture limits and owner-visible colors, texture, alpha, geometry and animation at 480×360. Check page-flip/vblank completion.
Repeat five clean starts/exits, bounded TERM and one KILL/restart. Inspect
retained memory, display restoration, scheduler errors and application recovery.
Run --static --seconds 300; verify no continuing GPU work and runtime/domain
idle. USR1 requests exactly one redraw using the existing context.
Run --seconds 120 --fps 30 with y2-gpu-collect 125 in parallel. Record
frame-time percentiles, CPU/RSS, CPU/PMIC temperature, clock state and charging watchdog/health. No GPU temperature or battery power number is fabricated.
During rendering check all controls and existing quiet ALSA/CS43131 playback,
including audible quality, XRUNs and DMA/clock errors.
Quiesce to static, perform the existing deep-suspend/RTC-or-Power-wake procedure,
confirm same boot ID, then USR1 redraw. Repeat with no GPU client. Respect existing M4 charging inhibition/unplug policy; do not bypass a suspend refusal.
Verify KMS/panel/backlight and the existing offline-charge display path with
the targeted M4 procedure. Avoid a whole M4 requalification unless a regression is actually observed.
Check the established Wi-Fi scan/concurrent Bluetooth-power baseline during
rendering and zero radio errors/recoveries; restore original radio state. **Association/WPA2/DHCP/network reconnect, real peer pairing/SBC/AVRCP and sustained/full Wi-Fi-traffic + Bluetooth-audio + GPU tests remain pending by owner choice.** Do not reopen connectivity architecture.
Inspect kernel, storage/filesystem, thermal and power errors; record actual
passes/limits and fill the final Reborn DRM/KMS + GBM + EGL + GLES contract.

Stop at an actual failure for a targeted fix. No broad GPU re-audit after deployment. GPU #34 closes only on real Lima/Mesa rendering, presentation, power/resume and coexistence evidence. Reborn is not started by this handoff.