I've been using the Sainsmart 3.2" and 3.5" TFT LCD (http://www.sainsmart.com/sainsmart-3-5-inch-tft-lcd-320-480-touch-screen-display-for-raspberry-pi-2-b-b.html) with my Raspberry Pi 2's. I recently bought the Pi 3 and can't seem to get the screen working.
I used these instructions to get it working on the Pi 2: http://www.circuitbasics.com/setup-lcd-touchscreen-raspberry-pi/
It seems to fail at the point I download notro's drivers from github (they download successfully, but on reboot, all I see on the hdmi display is the colored test square, and the SPI display is still backlight white with no image). It fails on this step even if I mix up the order.
sudo REPO_URI=https://github.com/notro/rpi-firmware rpi-update
Has anyone been able to get an SPI display working with these drivers or is there something else I need to be doing? I am using Raspbian Jessie.