Hello guys,
so, today I've make a adapter cable for video output, like described in
this thread (tip = shield and first ring is video signal) and conntected them to my Rock64 and my DELL 2007FP.
After power on........ nothing. So picture on the monitor....
Do I have to setup something else?
I'm using Debian Stretch 0.6.44. If I connect the board per HDMI, I get the signal.
All logs (u-boot, printenv and boot) are attached.
Many thanks.
After googling aroung, I've checked the /sys/class/drm directory. So here is just HDMI-1:
Quote:root@rock64:~# cd /sys/class/drm/
root@rock64:/sys/class/drm# ll
total 0
drwxr-xr-x 2 root root 0 Jul 15 17:51 .
drwxr-xr-x 64 root root 0 Jul 15 17:51 ..
lrwxrwxrwx 1 root root 0 Jul 15 17:51 card0 -> ../../devices/platform/display-subsystem/drm/card0
lrwxrwxrwx 1 root root 0 Jul 15 17:51 card0-HDMI-A-1 -> ../../devices/platform/display-subsystem/drm/card0/card0-HDMI-A-1
lrwxrwxrwx 1 root root 0 Jul 15 17:51 controlD64 -> ../../devices/platform/display-subsystem/drm/controlD64
lrwxrwxrwx 1 root root 0 Jul 15 17:51 renderD128 -> ../../devices/platform/display-subsystem/drm/renderD128
-r--r--r-- 1 root root 4096 Jul 15 17:51 version
root@rock64:/sys/class/drm#
So, I think here is my problem, here should be "card0-Composite-1" or something like that... It looks like Rock64 didn't recognize CVBS output...
Any ideas?
(07-15-2018, 11:57 AM)Osiander Wrote: [ -> ]After googling aroung, I've checked the /sys/class/drm directory. So here is just HDMI-1:
Quote:root@rock64:~# cd /sys/class/drm/
root@rock64:/sys/class/drm# ll
total 0
drwxr-xr-x 2 root root 0 Jul 15 17:51 .
drwxr-xr-x 64 root root 0 Jul 15 17:51 ..
lrwxrwxrwx 1 root root 0 Jul 15 17:51 card0 -> ../../devices/platform/display-subsystem/drm/card0
lrwxrwxrwx 1 root root 0 Jul 15 17:51 card0-HDMI-A-1 -> ../../devices/platform/display-subsystem/drm/card0/card0-HDMI-A-1
lrwxrwxrwx 1 root root 0 Jul 15 17:51 controlD64 -> ../../devices/platform/display-subsystem/drm/controlD64
lrwxrwxrwx 1 root root 0 Jul 15 17:51 renderD128 -> ../../devices/platform/display-subsystem/drm/renderD128
-r--r--r-- 1 root root 4096 Jul 15 17:51 version
root@rock64:/sys/class/drm#
So, I think here is my problem, here should be "card0-Composite-1" or something like that... It looks like Rock64 didn't recognize CVBS output...
Any ideas?
If both HDMI and CVBS plug in at the same time, I thinks the video route to HDMI output. Just unplug the HDMI cable form ROCK64 board and keep the AV cable plugin, there may be CVBS output.
No, the problem is different, under /sys/class/drm there is no device for composite output (should be called composite, TV or something similar). I didn't do that.
But, in the meantime, I'm a bit further along. After I modified the DTS file (added an &tve), there is now also a device for composite output:
Code:
root@rock64:~# tree /sys/class/drm/
/sys/class/drm/
|-- card0 -> ../../devices/platform/display-subsystem/drm/card0
|-- card0-HDMI-A-1 -> ../../devices/platform/display-subsystem/drm/card0/card0-HDMI-A-1
|-- card0-TV-1 -> ../../devices/platform/display-subsystem/drm/card0/card0-TV-1
|-- controlD64 -> ../../devices/platform/display-subsystem/drm/controlD64
|-- renderD128 -> ../../devices/platform/display-subsystem/drm/renderD128
-- version
The status of the device is connected:
And I also have that the modes are correct, Rock64 supports for composite only these two:
Code:
root@rock64:# cat /sys/class/drm/card0-TV-1/modes
720x576i50
720x480i60
And I also see that the correct mode is selected (720x576i50):
Code:
root@rock64:# cat /sys/class/drm/card0-TV-1/mode
720x576i50
root@rock64:#
But, I still can't get a picture on the TV. Only the composite cable is connected, no HDMI.
I attached the DTS file and dmesg output.