beeline-fast2-pmos-port

Pre-porting reconnaissance for Beeline Fast 2 — a Russian carrier-branded handset, hardware-relative of the Lenovo A2010 family, running on MediaTek MT6735M. Targets a postmarketOS / Alpine Linux port — primary intent is a low-power web-server / always-on Linux box.

This repo contains only sanitized hardware description harvested from a unit running the 4PDA-community AICP custom ROM (already rooted). No per-device IDs, no proprietary firmware blobs.

TL;DR

SoC	MediaTek MT6735M (Cortex-A53 x4)
RAM / Storage	1 GiB / 8 GB eMMC (Toshiba 008G30)
Display	ILI9806E MIPI-DSI, 480×854 FWVGA, ~5.0"
Stock Android	5.1.1 (this unit runs 4PDA AICP / cm_A2010)
Mainline kernel SoC support	partial (gitlab.com/mt6735-mainline/linux — UART, MMC, clocks, no GPU/modem)
Mainline board support	no
Bootloader	MediaTek (preloader → LK), no slots, GPT layout
Hardware family	rebrand-relative of Lenovo A2010 / A2010-a / A5006
Target architecture	aarch64 (Cortex-A53 is ARMv8; stock MTK BSP ran armv7 to cut Android-5 memory cost, but mainline mt6735-mainline/linux is aarch64)
pmOS port status	not started — this repo is step 0

Why this device

• 4× Cortex-A53 @ 1.0 GHz, 1 GiB RAM — passively-cooled headless Linux candidate
• 8 GB eMMC tight but enough for nginx/Caddy + small payload
• Already rooted (AICP build) — no extra unlock dance
• MTK mainline has a community effort to track, so kernel work is partly bootstrapped

What's in this repo

device_info.md              Sanitized full device write-up (drop into pmOS wiki).
extracted_dts/
  beeline_fast2_mt6735m.dts Decompiled DTS extracted from boot.img kernel append
                            (single FDT at offset 0x5ae550, 23 349 bytes,
                            model=MT6735M, compatible=mediatek,MT6735).

What is NOT in this repo

• Full eMMC image (mmcblk0_full.img, 7.5 GiB)
• proinfo, nvram, nvdata, protect1/2, secro, keystore, oemkeystore, tee1/2, seccfg, frp, metadata — per-device identity & calibration
• mmcblk0boot0 (MTK preloader, may be batch-specific DDR config)
• userdata, system, boot, recovery — stock-AICP code, can be re-extracted from any unit with this ROM

If you have a Fast 2 / A2010 / A5006 (same SoC family) and want to port, extract those from your own device with dd.

Bring-up checklist for a porter

1. Unlock / root — many MTK devices are simple, but some have ARB. AICP installer typically handled this. If your unit is on stock, use SP Flash Tool with a stock scatter to get to a state where adb root works (userdebug build).
2. UART console — ttyMT0 @ 921600 8N1 (note the unusual high baud!). MTK UART is normally exposed on test-pads or a USB-pin combo. printk.disable_uart=1 in stock cmdline → set to 0 for porting.
3. Build initial pmOS image based on mt6735-mainline/linux kernel + DTS from extracted_dts/.
4. fastboot boot pmos.img won't work cleanly on MTK fastboot — instead, flash to boot partition with a scatter (SP Flash Tool) or via dd from a chroot. Always keep a known-good boot.img backup before flashing.
5. USB-OTG networking will work via g_ether / g_ncm once kernel is up.
6. WiFi (MT6630-class chip) and modem — out of scope for the planned use case.

References

• MediaTek MT6735 mainline kernel: https://gitlab.com/mt6735-mainline/linux
• Lenovo A2010 downstream kernel (3.18): https://github.com/muralivijay/android_kernel_lenovo_a2010
• postmarketOS Wiki, Category:MediaTek
• 4PDA AICP for A2010 family: https://4pda.to/forum/index.php?showtopic=756039
• SP Flash Tool (official MTK flasher)

License

The DTS file in extracted_dts/ is derived from the device's running boot image (AICP/cm). Its copyright belongs to the original authors (MediaTek / Lenovo / AICP contributors). It is reproduced here for hardware-description / interoperability purposes only.

Sanitized device documentation (device_info.md, this README.md) is released under CC0 / public domain by the contributor.