OMAP-L138: LIDD display configuration

Part Number:OMAP-L138

Hello,

I'm using LIDD interface for L138 chip to drive the display. Currently I have an issue that LCD_HSYNC line is causing some noises so I'm wondering if there is a way to make it always low or high?

Currently the LIDD_CTRL setting for mode (bit [2:0]) is set to 100.  When I change it to 011, the display is not working anymore. TRM does have a description of LCD_HSYNC in overall architecture section: "The RASTER_TIMING_0 register fully defines the behavior of this signal".  Since I'm using LIDD so I'm not sure if this applies. 

Thanks for helping.