[linuxkerneldev]

> I meant the waveform data at offset 0x700000 on the internal storage of the Kobo devices

Waveform data is unique to each batch of panels and there are also tuning parameters for each batch of power management circuitry in a board. A Kobo with a 2015 panel will have different waveform data than a 2016 panel. More expensive panels contain the waveform in a flash on the panel which can be read by the host. Cheaper vendors will try to cut cost and just store the waveform in main flash. But that has caused some problem because end user accidentally flashes wrong firmware with a waveform that doesn't match the panel and bam, the panel quality is degraded, maybe even permanently.