Intel DQ77KB board eDP support in BIOS

[RTogh]

Hello

I'm trying to use the eDP port of DQ77KB, to connect it internally to a standard 20 pin DP receiver.

Question 1:

first of all, in BIOS settings, I cannot enable the eDP as the flat panel interface. in video settings-> IGD flat panel settings, I can see only "LVDS" and "Disable" options. how can I enable the eDP interface?

Question 2:

I did not find any eDP to DP cable, so I'm planning to make one, using the ACES88441 connector and a custom cable to connect the 4 digital Lanes to my DP receiver. Do you have any recommendation that this pin-out is correct and eDP and DP are compatible?

Pin OnPin OnDesceDPDP312Lane 3 N410Lane 3 P511GND69Lane 2 N77Lane 2 P88GND96Lane 1 N104Lane 1 P115GND123Lane 0 N131Lane 0 P142GND1515AUX P1617AUX N1716GND2718Hot Plug

[RTogh]

Any comment is highly appriciated.

[Silvia_L_Intel1]

Hello Toghraee,

Regarding question # 1, the eDP comes enable by default on BIOS.

About question # 2 we are checking if we have any information relate to this pin-out you are trying to make. At this point the information we have is on the technical product specification on page 62.

Regards.

[RTogh]

Hi Sylvia

many thanks for your reply.

I have tried different pinouts and also checked the edp lane output on my intel dq77kb with an oscilloscope. but it didnt show any signal.

I really need the advise for intel edp to dp pinout, especially for dp pin 19, 20 which is for power and power_return.

I have also connected the hotplug pin, but no result.

he same dp moniyor works fine when I connec it to normal dp pirt on intel dw77kb.

intel documents on efp is very few please help me to achive this project.

thanks

toghraee

[Silvia_L_Intel1]

We are going to check with the engineering team if they have any information about the correct pin-out.

As soon as I got an answer I will let you know.

Regards.

[RTogh]

Hi Sylvia

Thank you , I'm waiting for your information.

appreciated.

[Craig_W_Intel · Accepted solution]

Hi, Toghraee,

On DQ77KB, eDP shares the LVDS port, so whatever you set LVDS in the BIOS affects eDP as well.

Intel has posted instructions on building an eDP to DP cable in the whitepaper on validating eDP:

http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/validation-methodology-pape... http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/validation-methodology-pape.... Refer to pages 12-13 under the section "HW and SW Uniqueness". I believe this is what you are looking for. Let us know if you have any issues accessing the above link.

Craig