# eDP Link Training fails

**URL:** <https://forums.developer.nvidia.com/t/edp-link-training-fails/110364>\
**Category:** Jetson Nano\
**Created:** [January 13, 2020, 7:22pm UTC](https://forums.developer.nvidia.com/t/edp-link-training-fails/110364 "2020-01-13T19:22:01Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![timonske](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/timonske/32/21134_2.png) [@timonske](https://forums.developer.nvidia.com/u/timonske)\
**Post date:** [January 14, 2020, 10:24pm UTC](https://forums.developer.nvidia.com/t/edp-link-training-fails/110364/4 "2020-01-14T22:24:44Z")

</div>

Hi Wayne,  
thank for you quick reply!

Yes I remember that you mentioned DT changes for eDP but I understood those to be only regarding the backlight control pins.

Sorry if my wording about the display setup was confusing. I only ever have a single display or lcd panel connected and am only using DP0 right now. The only difference is the connector I use and of course a standard desktop monitor vs an eDP panel. I attached a picture of how it looks like with a DP connector attached, hopefully that clears things up regarding the hardware setup.

I copied over the prod settings from that file but after flashing I still get this message in the bootlog that prod\_c\_hbr is missing.

This is how my sor looks like right now:

```auto
sor {
			status = "okay";
			nvidia,xbar-ctrl = <2 1 0 3 4>;
			dp-display {
				status = "okay";
			};
			prod-settings {
				prod_c_hbr {
					prod = <
						0x00000590 0x00f00000 0x00400000 //SOR_NV_PDISP_SOR_PLL1_0	23:20=LOADADJ	0x04 
						>;
				};
				prod_c_hbr2 {
					prod = <
						0x00000590 0x00f00000 0x00600000 //SOR_NV_PDISP_SOR_PLL1_0	23:20=LOADADJ	0x06 
						>;
				};
				prod_c_rbr {
					prod = <
						0x00000590 0x00f00000 0x00300000 //SOR_NV_PDISP_SOR_PLL1_0	23:20=LOADADJ	0x03
						>;
				};

			};
		};

```

This is the other possible setup for the carrier with a DP connection. The other option is an adapter to eDP as seen in the picture of the first post.

 ![](https://global.discourse-cdn.com/nvidia/original/3X/2/e/2ec9e08078f8e1c2ced953cd757d21dd4d11ae64.jpeg)

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