Unfortunately, it's one of those "closed until you join" standards; you have to be a licensed member of the MIPI Alliance (Mobile Industry Processor Interface) to get the full specs.
Basically, DSI is about "lanes" of balanced differential serial connections between a display driver (in this case built into the CPU) and a display. There is a set of commands for configuring the display, setting pixels (and, if the display is "smart" and has on-board memory, also for reading pixels) and so on.
Unfortunately, it's one of those "closed until you join" standards; you have to be a licensed member of the MIPI Alliance (Mobile Industry Processor Interface) to get the full specs.
Basically, DSI is about "lanes" of balanced differential serial connections between a display driver (in this case built into the CPU) and a display. There is a set of commands for configuring the display, setting pixels (and, if the display is "smart" and has on-board memory, also for reading pixels) and so on.