B-LCD40-DSI1 including OTM8009A data lane setting

[ELee.9]

Hi, I'm doing a project using STM32F769I-Eval.

In this kit, there is a LCD module called B-LCD40-DSI1 including dsi module(OTM8009A).

First, I looked up the example LCD_DSI_CmdMode_SingleBuffer in STM32CUBE_F7. After,

I connected LCD with DSI communication. I set DSI data lanes to two, and it works pefectly. But when I changed it to one, the display didn't work perfectly. It only worked in Low Power Mode, because this mode originally works with one lane. I think I should change lane setting in display module too.

So, I wonder if I can change this setting to one.

Is there any way to change lane setting in OTM8009A or B-LCD40-DSI1?

Or is there any example using one data lane with OTM8009A or B-LCD40-DSI1?

Thanks.

[Tesla DeLorean]

You'd need to configure the appropriate clocking of the LTDC and DSI to be coherent with the rate at which data is thrown off, without exceeding the bandwidth of a single lane.

And the OTM8009A would need its settings/expectations to be a single lane, bandwidth of STM32 probably going to limit you to 5:6:5 with a single lane

480 x 800 24 bpp or 16 bpp @ 60 Hz

https://www.orientdisplay.com/pdf/OTM8009A.pdf

Not spent time on it here, would expect a couple of man-days of fiddling and testing once some workable LTDC / DSI clocking and PLL parameters are derived.

[ELee.9]

Thanks for the reply.

I've tested so many clock timings, bandwidth, clocks and lcd settings, it didn't work all.

I think I should change data lane number settings in B-LCD40-DSI1 or OTM8009A. So I checked OTM8009A datasheet, the​ LANSEL value is mentioned. So I want to change it to one, but I can't find any way to change it.

Do you know how to do it?

Thank you.

[SONGTAOSI]

Hi, I'm really interested in this topic.

Did you finally work sucessfully using one data lane with B-LCD40-DSI1?Could you please tell me how to do?

Thanks.