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Old 11-06-2013, 08:17 PM   #1
farious
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Join Date: Nov 2013
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Lightbulb DisplayLink protocol reversal

Hi,

I'm a student from Instituto Superior Técnico in Lisbon and I'm working on a project regarding a DisplayLink.
The objective is to retrieve an image given the USB communication between the Host and the DisplayLink.

I found some work in that area, but it was on the reverse problem: given an image produce the necessary usb packets to send to the DisplayLink in order to display the image correctly.

Do you know of any software\script\source that enables the decompression of the image?
I already managed to decrypt the usb packages, but now I got a bunch of low-level communications and I'm getting a hard time to get some sense out of it.

Is there any document describing the protocol used? Can I ask DisplayLink? (if so, how?)

I think that what I want to achieve is like an DisplayLink "emulator".

I hope this is the correct place to post this question.

Kind regards,

Fábio
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Old 11-11-2013, 05:31 AM   #2
noleti
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Join Date: Nov 2012
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Hi Fabio,
I guess your best help would be a look at the open source display link driver for linux, and get the protocol from the code. libdlo and udlfb are the right keywords there I guess. Good luck!
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decompresion, reverse, usb protocol

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