Using dsi only one data lane with two data lane Touchscreen

[ELee.9]

Hi, I'm trying to use only one dsi data lane with OTM8009A which has two data lanes.

My MCU is STM32F769I-Eval and manuals said that this MCU has two dsi data lanes.

However, I want to use only one data lane because my custom board has only one dsi data lane.

I tried to change settings with Examples within F7Cube.

In LCD_DSI_Videomode_SingleBuffer, DSI Settings value is in there, so I change NumberOfLanes value two to one, but LCD Display doesn't work.

Is there any way to use only one data lane?

Thanks.

[MM..1 · Accepted solution]

If display dont have this choice NO. Otherwise send init commands to display for setup one lane mode.

[ELee.9]

That means, If I couldn't modify the number of data lanes in display(in this case, OTM8009A), display will not work?

OTM8009A has two data lanes, and If I change the number of data lanes in STM32 to one, I think It will work strangely, but screen is only black.

When I change the number of data lanes in STM32 to two, It works properly.

[MM..1]

Simply you need change on both sides of bus...