[Bug 93980] blank screen at 4k at 60Hz DP 1.2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93980

--- Comment #7 from Alin M Elena <alinm.elena at gmail.com> ---
Thanks for the update! So for the moment I shall keep and eye open. 

Alin

On Thursday, 4 February 2016 17:13:53 GMT you wrote:
> https://bugs.freedesktop.org/show_bug.cgi?id=93980
> 
> --- Comment #6 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
> (In reply to Alin M Elena from comment #5)
> 
> > Current CD clock frequency: 450000 kHz
> 
> Yep, that's too low for you 4k at 60 mode. We'd need to bump to 540 MHz at
> least. Unfortunately we don't support dynamic cdclk change on SKL yet.
> There are some patches in flight somewhere to get it done, but last time I
> looked it still needed more work. In the meantime we should really change
> things to report the current cdclk as the max cdclk when we don't actually
> support changing the cdclk, and we need to merge these [1] patches to
> filter out modes we can't drive.
> 
> [1] http://patchwork.freedesktop.org/series/3009/

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