[Intel-gfx] DP link training and performance issues with HDMI USB-C dongle and Skylake

[Jani Nikula]

On Thu, 23 Jun 2016, Andy Lutomirski <luto at amacapital.net> wrote:
> I have a Dell XPS 13 9350 (Skylake) and a Dell DA200 adapter.  The
> latter is a Thunderbolt device that includes an HDMI port and connects
> over USB Type C.  I believe that it's internally using DP Alternate
> Mode.

> I don't know whether this is a hardware issue, an Alpine Ridge
> firmware issue (mine is out of date because it appears to be
> impossible to update it on Linux for now), or an i915 driver issue.

At least a driver issue. The support is not there yet. Bug at [1].

BR,
Jani.


[1] https://bugs.freedesktop.org/show_bug.cgi?id=93578



-- 
Jani Nikula, Intel Open Source Technology Center