Sorry, I can't tell you specifics about the Toshiba board and our source code/binaries is not published externally.
But I can prob direct you on hints though.
Here is something to work of off, its a similar chipset: https://github.com/ultragtx/kernel-glass/tree/master/drivers/video/omap2/displays
Looks like the RPI guys finally releasing their source for the driver: https://patchwork.kernel.org/patch/9723275/
We wrote our own I2C library to interface with the Toshiba to configure it correctly. We wrote a DSI dtsi configuration and matched it with our LCD configuration and set it all up through the I2C library. This is pretty crucial, the LVDS will be weird if isn't configured to match the DTSI.
Also, depending on the LCD you're using, you may need to have another driver for it. We have a SPI interface/driver to also configure the LCD independently of the bridge and DTSI files. This isn't really necessary but we had some weird color data quirks and tweaked it on the LCD side rather than hacking the Qualcomm driver.
One hint that wasn't documented was that the Toshiba bridge comes up in sleep mode and requires the I2C wake up command to put it into active mode. Otherwise, the display never turns on. That took me a while of probing and scoping to figure that out:s