Nouveau - Jun 2015 - support for dp 1.2

Guys,

Is there support for display port 1.2 with the nouveau driver and GTX
970?

I have a dell 4K monitor and to run it in 4K mode at 60Hz I need to
configure the monitor to run version 1.2 of the display port protocol.
the nouveau driver works well with display port 1.1 but I only get a
30Hz refresh rate at 4K resolution.

thanks.

On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <adler at stephenadler.com>
wrote:
> Guys,
>
> Is there support for display port 1.2 with the nouveau driver and GTX
> 970?
>
> I have a dell 4K monitor and to run it in 4K mode at 60Hz I need to
> configure the monitor to run version 1.2 of the display port protocol.
> the nouveau driver works well with display port 1.1 but I only get a
> 30Hz refresh rate at 4K resolution.
The DP 1.2 540MHz rate should be supported. However there is presently
no MST support, so if the monitor has 2 internal panels, that won't
pan out so well (yet).

Also note that the GTX 970 requires signed firmware from NVIDIA to use
any acceleration, and we haven't quite yet figured out how to get that
going. This means that all you get is modesetting, no acceleration.
Esp with a 4K screen, using llvmpipe may feel slow if you use a GL
compositor, as many modern desktops do.

  -ilia

On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote:
> On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <
> adler at stephenadler.com> wrote:
> > Guys,
> > 
> > Is there support for display port 1.2 with the nouveau driver and 
> > GTX
> > 970?
> > 
> > I have a dell 4K monitor and to run it in 4K mode at 60Hz I need to
> > configure the monitor to run version 1.2 of the display port 
> > protocol.
> > the nouveau driver works well with display port 1.1 but I only get 
> > a
> > 30Hz refresh rate at 4K resolution.
> 
> The DP 1.2 540MHz rate should be supported. However there is 
> presently
> no MST support, so if the monitor has 2 internal panels, that won't
> pan out so well (yet).
> 
> Also note that the GTX 970 requires signed firmware from NVIDIA to 
> use
> any acceleration, and we haven't quite yet figured out how to get 
> that
> going. This means that all you get is modesetting, no acceleration.
> Esp with a 4K screen, using llvmpipe may feel slow if you use a GL
> compositor, as many modern desktops do.
> 
>   -ilia
> 
Thanks for the quick response. I'm having a hell of a time with the
nvidia driver since I have three 4K monitors which hook up to the GTX
970 card, but in linux it will only drive two of the 3 monitors. The
monitors do have the dual internal panels each running at 1920x2160 or
something like that. For some reason nvidia only drives 4 of the panels
(two monitors) per GPU...

Is the MST support imminent? or off into the future?

Cheers.