Change the device tree for DisplayPort on DP1?

Hi,

Here is the result:

dpaux_regs

You have cable connected on the board when you dump this dpaux_regs, right?

yes exactly, I have connected a cable.

Without cable comes exactly the same

Is the output of cat dpaux-regs ok like this? Or is there an error with dpaux?

Not ok. But the reason is still unknown. The internal team is help check.

We don’t have any usecase to enable DP on DP1 before. You are the first one trying to configure this.

Thank you very much! We’ll get it right :-)

And for your previous question. The “nvidia,hpd-gpio” is not in use. This pin is hardcoded in the hardware.

The TX1 TRM document has this as reference.

Based on the pin’s level, a register gets updated to indicate Hotplug status:

DPAUX_DP_AUXSTAT_0

HPD_STATUS

Reports the current state of the HPD line, plugged or unplugged. This field is valid at

all times, not just at the end of a transaction.

This status is based on the value of the GPIO associated with this AUX channel. The connection

between GPIO and AUX channel is hard coded, so they must be kept together when assigning them to

an SOR link

AUX0 GPIO(1)

AUX1 GPIO(19)

AUX2 GPIO(15)

AUX3 GPIO(21)

thank you very much, that explains it well

You notify me,as soon as there is news?

Hi,
I just wanted to ask cautiously if there is a result yet?

Has the team found a solution to our problem yet?

Sorry, not yet.

Okay thanks!