[Bug 97244] [DP] [SKL] 5k tiled dual DP (two-pipe, two-port) display sync issues

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97244

--- Comment #36 from Ross Bishop <rossbishop at live.co.uk> ---
(In reply to Tomas Bzatek from comment #35)
> Created attachment 136834 [details]
> RWEverything PCI dump
> 
> Still a problem with drm-tip 2018y-01m-18d-18h-18m-07s
> 
> I was finally able to grab the PCI configuration space from a Windows 7
> system running full resolution - see attached. The dump was created with the
> RWEverything tool. Let me know if you need any other memory region, hope
> this one would be useful.
> 
> Although Dell UP2715K is now EOL, there are some other panels on the market
> requiring dual DP1.2 inputs: HP Z27q, Philips 275P4VYKEB. Although no idea
> what controllers do these panels use.

Nice one Tomas, I was completely lost in attempting to do this.

It's not just the 5K monitors of the past, Dell's Ultrasharp UP3218K is an 8K
tiled monitor currently available and Phillips has previewed the 328P8K which
is set to release this year as well.

So far as I see it, this approach to the cutting edge isn't going to go away
and as these monitors enter the second hand market, they represent excellent
value for money, and are at times the only option to have access to such high
resolutions. The first single port solution (ignoring the LG TB3 monitor which
only works properly with Mac) is only just hitting the market, some 3 or so
years after the first 5K monitors dropped.

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