Displayport : channel reconfiguration

Hi everyone,

i struggle to make the display port work on a10 sockit.

To be more precise, i use the demo given in rocketboards, so in TX mode at 5.4Gbps, 1920x1080p test pattern gen II and Clocked Video output with colour bars to be displayed.

After AUX channel transactions, i can read that TX channel has been correctly trained (i refer to the screen resolution that has been detected)

--- Quote Start ---

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------ TX Main stream attributes -----

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--- Stream 0 ---

MSA lock : 1

VB-ID : 10 MISC0 : 20 MISC1 : 00

Mvid : 232F Nvid : 8000

Htotal : 2200 Vtotal : 1125

HSP : 0000 HSW : 0044

Hstart : 0192 Vstart : 0041

VSP : 0000 VSW : 0005

Hwidth : 1920 Vheight : 1080

CRC R : 22f0 CRC G : 0a2e CRC B : b7bb

--- Stream 1 ---

MSA lock : 0

VB-ID : 00 MISC0 : 00 MISC1 : 00

Mvid : 0000 Nvid : 0000

Htotal : 0000 Vtotal : 0000

HSP : 0000 HSW : 0000

Hstart : 0000 Vstart : 0000

VSP : 0000 VSW : 0000

Hwidth : 0000 Vheight : 0000

CRC R : 0000 CRC G : 0000 CRC B : 0000

------------------------------------------

-------- TX Link configuration -------

------------------------------------------

Lane count : 1

Link rate : 1620 Mbps

--- Quote End ---

But nothing happens on screen.

And i don't understand why i get only one lane count. 1.6Gbps is not enough to handle 1080p

If you have an idea, please share it. Thanks