Is MCIMX7SABRE possible for dual boot of EInk Display and HDMI display?
Android 7.1.1
Kernel 4.1.15
If possible, please tell me about U-Boot environment variables.
mx7 couldn't support hdmi directly, you should use the chip like Sii902x, if you use this, yes, mx7 can support dual display, the command depends what epdc and hdmi you use, for detailed command, you can refer to the release note.