Hi Wayne,
Here is the result from these registers:
Look the first one has incorrect value. What should I do to debug this? It seems no wrong with my mipi circuit.
After I using this cpmmand nvidia@nvidia-desktop:~$ sudo busybox devmem 0x02440030 32 0x00000450 changing the value manually, there is a screen detected.
nvidia@nvidia-desktop:~$ xrandr
Screen 0: minimum 8 x 8, current 5760 x 2160, maximum 32767 x 32767
HDMI-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 620mm x 350mm
3840x2160 60.01*+ 60.02 59.98 50.01 30.00 29.97 25.00 24.00 23.98
4096x2160 60.02 59.98 50.01 30.00 29.97 25.00 24.00 23.98
2560x1440 144.04
1920x1080 120.08 120.00 100.01 60.00 60.00 59.95 50.00 30.00 29.97 25.00 24.00 23.98
1440x900 59.89
1400x1050 59.98
1280x1024 75.03 60.00
1280x960 60.00
1280x720 60.00 59.94 50.00
1152x864 75.00
1024x768 75.03 70.07 60.01
832x624 75.05
800x600 75.00 72.19 60.32 56.25
720x400 70.04
640x480 75.00 72.81 67.06 59.94
HDMI-1 connected 1920x1080+3840+0 (normal left inverted right x axis y axis) 890mm x 500mm
1920x1080 60.00*+ 59.95 50.00
1280x720 60.00 59.94 50.00
720x480 59.94
640x480 59.94 59.94
Is this output correct? But still there is no display from screen.
Please go to Linux_for_Tegra/bootloader/t186ref and pick up the pinmux file your board is using. Check the pinmux of this 0x0244030.