On 29/09/15 17:10, Dr. H. Nikolaus Schaller wrote:
but it does not work. Monitor reports no signal, status is „disconnected“ (independently of having the monitor connected before boot or after). I also can’t read the edid through /sys - so I think the driver is powered down.
Hmm, that hints to a HPD problem. This was on your custom board, not omap5 uevm? Have you verified the HPD pin? And the +5V that goes to the HDMI connector, supplied by the board?
If those are ok, then I guess easiest way is to add debug prints to the drivers/video/fbdev/omap2/displays-new/encoder-tpd12s015.c (presuming your board has tpd12s015/16), related to 'hpd_gpio'. Or, I guess you can see the value from debugfs's gpio file, if that's enabled in your kernel.
So how can I enable the HDMI port? And it appears that a single X11 screen shares both potential outputs.
Can this be solved by xorg.conf or is it something else?
I'm no expert on X, so I don't know. But I think xrandr can be used to configure the outputs, and there were lots of options for them.
Tomi