I would like display standard demo on display FRD55 using standard code form emcraft repository (https://www.emcraft.com/som/imx-8m/using-mipi-dsi-to-connect-the-frd-55-display-panel).
After the system boots up display is dark, nothing show (backlight work). I check hardware and every power supply is fine. In logs I have the same information like in tutorial (see in attachment).
I checked frame buffer set and timings have only 0 value. Is it correct ? Below is data from terminal:
geometry 1920 1080 1920 1080 32
timings 0 0 0 0 0 0 0
I tried run lcdtest but effect is the same: display is dark. Below is data from terminal:
The framebuffer can be accessed at the address 0xffffa3851000
I tried upload frame buffer random data but I got receive, that buffor didn’t left space:
root@imx8m-som:~# > sudo cat /dev/urandom > /dev/fb0
cat: write error: No space left on device
Please give me some advice what is wrong,