Created attachment 122710 [details]
attachment-9966-0.html

I believe you can get this behaviour by setting the scaling mode property
to full. This should be possible with xrandr, or directly via the kms api.
It defaults to no scaling for external screens, as those usually have
better scalers built in.
On Apr 4, 2016 10:44 AM, <bugzilla-daemon@freedesktop.org> wrote:

> Bug ID 94817 <https://bugs.freedesktop.org/show_bug.cgi?id=94817>
> Summary Nearest neighbor scaling?
> Product xorg
> Version unspecified
> Hardware Other
> OS All
> Status NEW
> Severity enhancement
> Priority medium
> Component Driver/nouveau
> Assignee nouveau@lists.freedesktop.org
> Reporter nw9165-3201@yahoo.com
> QA Contact xorg-team@lists.x.org
>
> Hello,
>
> would it be possible that you add a nearest-neighbor scaling mode to the
> driver, so that one could display 1920x1080 natively on a 3840x2160 monitor or
> 1280x720 natively on a 2560x1440 monitor and so on (one pixel becomes four
> pixels)?
>
> There is some information on this topic over there:
> https://forums.geforce.com/default/topic/844905/geforce-drivers/integer-scaling-mode/
>
> Regards
>
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Hi,

actually I have submitted the same feature request for the Intel and AMD drivers and also for the NVIDIA proprietary one as well yesterday. It has resulted in a patch for xrandr that allows to use nearest neighbor scaling now, see:

https://bugs.freedesktop.org/show_bug.cgi?id=94816
https://bugs.freedesktop.org/show_bug.cgi?id=94820
https://bugs.freedesktop.org/show_bug.cgi?id=94819

Anyway, as already being discussed in those three threads, it would be interesting to know if the dedicated hardware scaler inside the GPU could also be used for this instead of using xrandr.

Can anyone comment on this?

Regards

(In reply to nw9165-3201 from comment #2)
> Hi,
> 
> actually I have submitted the same feature request for the Intel and AMD
> drivers and also for the NVIDIA proprietary one as well yesterday. It has
> resulted in a patch for xrandr that allows to use nearest neighbor scaling
> now, see:
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=94816
> https://bugs.freedesktop.org/show_bug.cgi?id=94820
> https://bugs.freedesktop.org/show_bug.cgi?id=94819
> 
> Anyway, as already being discussed in those three threads, it would be
> interesting to know if the dedicated hardware scaler inside the GPU could
> also be used for this instead of using xrandr.
> 
> Can anyone comment on this?
> 
> Regards

The thing I suggested earlier will use hw for scaling. Run 'xrandr --props' to find the exact property. IOW the feature already exists.