eInk screen blacks fading when refreshing other parts of the screen

[ekerebel]

Hello,

I have a custom board, based on the iMX6SLL, with an eInk screen and the TPS65185 PMIC.

The screen displays correctly but the blacks quickly fades when other parts of the screen are being refreshed.

See in the video attached, the top right corner gets displayed numbers over a black background. Initially, the black turns out OK but soon becomes grey.

I am using the waveform shared by eInk, the VCOM and temperature are set properly.

The display works fine when testing the same software on the iMX6SLL EVK + EPDC adapter board (w/ MAX17135).

[ekerebel · Accepted solution]

I have resolved my problem, the wrong TPS6518x rev id was being used in the driver, resulting in VCOM not being set properly