I've been looking the same info, I might have something that could help.http://home.comcast.net/~olimar/DS/jumbotron/
"quote from the website"
The closest match I could find to the DS LCD is Sharp LQ030B7DD01. You can find a datasheet Here. Aside from RGB, the only LCD signals I needed to use were DCLK1 and GSP1 (everything is conveniently labeled on the DS PCB). GSP1 is vsync, analogous to SPS in the datasheet. I find hsync by counting clocks (263 per line). If you need the actual hsync signal from the DS, you'll have to find it yourself; I don't know which one it is. The bottom screen data is latched on rising clock edges, top screen is read on the falling clock. I had to buffer a full frame in ram because screen timings didn't quite match up (incidentally, this also made adding the screen capture ability very easy).