support for dp 1.2

support for dp 1.2

[Stephen Adler]

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.

_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau

Re: support for dp 1.2

[Ilia Mirkin]

On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <adler@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
_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau

Re: support for dp 1.2

[Stephen Adler]

On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote:
> On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <
> adler@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.




_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau

Re: support for dp 1.2

[Ilia Mirkin]

On Tue, Jun 16, 2015 at 3:53 PM, Stephen Adler <adler@stephenadler.com> wrote:
> On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote:
>> On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <
>> adler@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...

Kepler+ GPUs only have 4 CRTC's, so you can only scan out 4 things at
a time [pre-Kepler have only 2 CRTC's]. However perhaps you can have a
single CRTC split an image up into 2 encoders, I don't really know how
that works, esp in the context of DP-MST, where it's really a single
encoder.

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

It's on the horizon... a horizon, of course, being an imaginary line
that keeps moving further away as you attempt to approach it :) Here's
Ben's tree from a year ago (which BTW has no support for your GPU at
all):

http://cgit.freedesktop.org/~darktama/nouveau/log/?h=devel-mst

AFAIK he's been putting it off, trying to combine it with a conversion
to atomic modesetting.

  -ilia
_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau

Re: support for dp 1.2

[Stephen Adler]

On Tue, 2015-06-16 at 16:00 -0400, Ilia Mirkin wrote:
> On Tue, Jun 16, 2015 at 3:53 PM, Stephen Adler <
> adler@stephenadler.com> wrote:
> > On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote:
> > > On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <
> > > adler@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...
> 
> Kepler+ GPUs only have 4 CRTC's, so you can only scan out 4 things at
> a time [pre-Kepler have only 2 CRTC's]. However perhaps you can have 
> a
> single CRTC split an image up into 2 encoders, I don't really know 
> how
> that works, esp in the context of DP-MST, where it's really a single
> encoder.
> 
> > 
> > Is the MST support imminent? or off into the future?
> 
> It's on the horizon... a horizon, of course, being an imaginary line
> that keeps moving further away as you attempt to approach it :) 
> Here's
> Ben's tree from a year ago (which BTW has no support for your GPU at
> all):
> 
> http://cgit.freedesktop.org/~darktama/nouveau/log/?h=devel-mst
> 
> AFAIK he's been putting it off, trying to combine it with a 
> conversion
> to atomic modesetting.
> 
>   -ilia
> 

Thanks Ilia, you certianly seem to know what your talking about...
So... how about this question? Would you be familiar with the Base
Mosaic and/or SLI mosaic configurations for the nvidia driver?
specifically if they work with geforce cards? I know they work with
quadro cards. (At least the base mosaic does with the quadro cards.)

I may just get me another card to solve the 3 monitor problem.

thanks for all the feed back!

Steve.

_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau

Re: support for dp 1.2

[Ilia Mirkin]

On Tue, Jun 16, 2015 at 4:15 PM, Stephen Adler <adler@stephenadler.com> wrote:
> On Tue, 2015-06-16 at 16:00 -0400, Ilia Mirkin wrote:
>> On Tue, Jun 16, 2015 at 3:53 PM, Stephen Adler <
>> adler@stephenadler.com> wrote:
>> > On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote:
>> > > On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <
>> > > adler@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...
>>
>> Kepler+ GPUs only have 4 CRTC's, so you can only scan out 4 things at
>> a time [pre-Kepler have only 2 CRTC's]. However perhaps you can have
>> a
>> single CRTC split an image up into 2 encoders, I don't really know
>> how
>> that works, esp in the context of DP-MST, where it's really a single
>> encoder.
>>
>> >
>> > Is the MST support imminent? or off into the future?
>>
>> It's on the horizon... a horizon, of course, being an imaginary line
>> that keeps moving further away as you attempt to approach it :)
>> Here's
>> Ben's tree from a year ago (which BTW has no support for your GPU at
>> all):
>>
>> http://cgit.freedesktop.org/~darktama/nouveau/log/?h=devel-mst
>>
>> AFAIK he's been putting it off, trying to combine it with a
>> conversion
>> to atomic modesetting.
>>
>>   -ilia
>>
>
> Thanks Ilia, you certianly seem to know what your talking about...
> So... how about this question? Would you be familiar with the Base
> Mosaic and/or SLI mosaic configurations for the nvidia driver?
> specifically if they work with geforce cards? I know they work with
> quadro cards. (At least the base mosaic does with the quadro cards.)
>
> I may just get me another card to solve the 3 monitor problem.

Nope, sorry. Not really familiar with what the blob drivers offer in
that regard. I will say that if the actual HW supports your
configuration (e.g. it works fine in Windows with the exact same
cables / connectors / etc), chances are you can file a bug with them
somehow, not sure what the response rate is though.

I do know that things will go much smoother if all your monitors are
hooked up to a single GPU than to multiple GPU's.

  -ilia
_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau

Re: support for dp 1.2

[Dave Airlie]

On 17 June 2015 at 05:53, Stephen Adler <adler@stephenadler.com> wrote:
> On Tue, 2015-06-16 at 15:47 -0400, Ilia Mirkin wrote:
>> On Tue, Jun 16, 2015 at 3:33 PM, Stephen Adler <
>> adler@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?

even with MST 4 crtc, will only run 2 4k monitors.

Dave.
_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/nouveau