Guides

Concept guides that apply to more than one device. Each states which devices it was verified on.

• Qualcomm boot chain and EDL: PBL, XBL, ABL, secure boot, Sahara/Firehose, entering and leaving EDL, loaders, crash dumps.
• A/B on a single-slot device: turning a single-slot GPT into A/B, slot attributes, fallback, the bootloader side.
• Mainline bring-up method: vendor device tree first, a one-shot test slot, crash logs without a serial console, the bring-up order.
• Boox firmware: downloading, decrypting and inspecting update packages.

Planned:

• Software-driven e-ink panels: how a panel without a hardware display controller is driven (waveforms, frame timing, temperature, the engine's job).