EDM-G-IMX8MP + LVDS display

[miro-p]

There are no instructions on how to build an imx-image-desktop image for the EDM-G-IMX8MP on the WB motherboard with 10" LVDS display

[wigcheng]

We had Ubuntu instruction on our development wiki:

Release Notes:
https://developer.technexion.com/docs/ubuntu-2004-gnome-release-notes

User Guide:
https://developer.technexion.com/docs/building-ubuntu-2004-gnome

10"LVDS? That is a overlay file only, just need change u-boot argument.

Thanks.

[miro-p]

Hi,
thanks for the information.

I paused u-boot and checked if overlay file for 10" LVDS display is present

u-boot=> fatls mmc 1
24887304 Image
8208 hello_world.bin
3879 imx8mp-edm-g-wb-hdmi2mipi-tc358743-dual.dtbo
2094 imx8mp-edm-g-wb-hdmi2mipi-tc358743-single-cam1.dtbo
2841 imx8mp-edm-g-wb-lvds-vl10112880.dtbo
2155 imx8mp-edm-g-wb-lvds-vl15613676.dtbo
2184 imx8mp-edm-g-wb-lvds-vl215192108.dtbo
etc...

u-boot=> setenv dtoverlay "lvds-vl10112880"

u-boot=> saveenv
Saving Environment to MMC... Writing to MMC(1)... OK

u-boot=> boot

Booting from mmc ...
85942 bytes read in 2 ms (41 MiB/s)
Overlaying lvds-vl10112880...
2841 bytes read in 1 ms (2.7 MiB/s)
Moving Image from 0x40480000 to 0x40600000, end=41ec0000
Flattened Device Tree blob at 43000000
Booting using the fdt blob at 0x43000000
Using Device Tree in place at 0000000043000000, end 0000000043020fff
fail to get display timings
probe video device failed, ret -22

Starting kernel ...

HDMI output is functional, but VL101-12880YL-C13 LVDS display still doesn't work.

[miro-p]

Hi,
I checked HW and I found that there was a problem with 12V backlight voltage. After resolving of HW issue display started to work.
Could you advise how to set correct resolution? I tried kanshi, wdisplays, wlr-randr. All attempts ended with "compositor doesn't support wlr-output-management-unstable-v1"