I have an armStoneA9r2 with quad core. I'm using a 1080p60 LVDS display. The display is operated in split mode.
Display Datasheet: https://www.data-modul.com/sit…pecification_12024698.pdf
Display Settings:
- Timing Einstellungen:
- root@fsimx6:~# fbset -i
- mode "1920x1080-60"
- # D: 141.864 MHz, H: 66.603 kHz, V: 60.003 Hz
- geometry 1920 1080 1920 1080 32
- timings 7049 0 0 0 0 210 30
- rgba 8/16,8/8,8/0,8/24
- endmode
- Frame buffer device information:
- Name : ldb0
- Address : 0x3c100000
- Size : 8294400
- Type : PACKED PIXELS
- Visual : TRUECOLOR
- XPanStep : 1
- YPanStep : 1
- YWrapStep : 1
- LineLength : 7680
- Accelerator : No
When I start the board, the 4 Tux come, when it switch to the splash screen, the screen goes black and it stays black. Everything else continues to work.
The clock lines of the two LVDS signals continue to clock.
If I reduce the clock frequency of the display, so that the refresh rate is also reduced, then everything works as it should. The splash screen comes up and the GUI is displayed. However, sometimes the display goes black at some point.
For example, if I run /opt/g2d_samples/g2d_overlay_test , it runs through a maximum of one or two times, after which no graphical output works anymore. The display stays black.
The only interesting thing I find in the dmesg output is:
- dmesg | grep ipu
- imx-ipuv3 2400000.ipu: IPU DMFC ONLY-DP HIGH RESOLUTION: 5B(0~3), 5F(4~7)
- imx-ipuv3 2800000.ipu: IPU DMFC ONLY-DP HIGH RESOLUTION: 5B(0~3), 5F(4~7)
- imx-ipuv3 2800000.ipu: WARNING: adapt panel end blank lines
- imx-ipuv3 2800000.ipu: IPU Warning - IPU_INT_STAT_10 = 0x00080000
- imx-ipuv3 2800000.ipu: WARNING: adapt panel end blank lines
- imx-ipuv3 2800000.ipu: IPU Warning - IPU_INT_STAT_10 = 0x00080000
However, I am unsure whether the output has anything to do with my problem, as this dmesg output comes when the graphical output is still working.
Does anyone have any idea where the problem can come from?
The CPU should be able to make 1080p60 with LVDS?