Can use Gpios to simulate Hsync and Vsync signal of LCM ?

Hi:

My board is based on AM3359 and Android4.0.3. Because we miss Hsync and Vsync signal pins on my board when design, we have to think a other way for driver our LCD. Our HW ENG want to use a interrupt pin to sample a 6MHz Pixel Clk signal, then count then Hsync and Vsync timing in the IRQ handler function, and output they via two other GPIO to LCD. Now we concern this scenario can not be implemented, is that the GPIO of AM3359 can handle this scenario?

BR

Wu, Zhi-Rong