Dear @piseek,
Could you run the Gpio tool and verify the functionality of the following pins. I am highly suspecting LCD_PON signal, Could you turn GPIO and set to an enabled state. HSYNC, VSYNC, DE signals should be IPU1 functionality.
Display – Signal Name – SODIMM pin
30 LCD_PCLK 56
31 LCD_PON 90
32 LCD_HSYNC 68
33 LCD_VSYNC 82
34 LCD_DATA_ENABLE 44
Set below splash screen configuration
- ss.pclk: 9000000 (PixelClock (in Hz))
- ss.hsw: 0 (Horizontal Sync Width)
- ss.blw: 40 (Begin of Line Width)
- ss.elw: 5 (End of Line Width)
- ss.vsw: 0 (Vertical Sync Width)
- ss.bfw: 8 (Begin of Frame Width)
- ss.efw: 8 (End of Frame Width)
- ss.width: 480 (Display Width)
- ss.height: 272 (Display Height)
- ss.disp_gpio: 90 (Display On/Off SO-DIMM/MXM3 pin (0 means no pin used for this purpose))
Set below registry, you don’t need to touch any other registry
[HKEY_LOCAL_MACHINE\Drivers\Display\Colibri]
"UseSplashSettings"=dword:00000001
Still, if you see the issue then probe PCLK, PON, HSYNC, VSYNC, DATA_ENABLE signals and let us know the results.