Lost mipi-dsi display after recent update

[Learnincurve]

Hi.

I have been running mainline on a Pine64 with mipi-dsi lcd Feiyang display since Focal release.

I default application ran directly on framebuffer without X, with startup log rolling until the application loaded, but after recent update including kernel 6.6.44 the display is completely black, all the way from boot.

I can see that the screen is being identified at boot, but not sure what else to check.

Here are relevant lines from dmesg and modules:

$ dmesg | grep mipi
[   10.113223] sun6i-mipi-dsi 1ca0000.dsi: Attached device fy07024di26a30d

 

$ lsmod | grep fy0702*
panel_feiyang_fy07024di26a30d    12288  0

 

Please can anyone say where should I continue checking?

BR