Nouveau - Apr 2016 - [Bug 94817] New: Nearest neighbor scaling?

https://bugs.freedesktop.org/show_bug.cgi?id=94817

            Bug 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 at lists.freedesktop.org
          Reporter: nw9165-3201 at yahoo.com
        QA Contact: xorg-team at 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

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20160404/d57e381c/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=94817

nw9165-3201 at yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|Other                       |All

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20160404/f33c0cef/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=94817

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
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 at 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 at lists.freedesktop.org
> Reporter nw9165-3201 at yahoo.com
> QA Contact xorg-team at 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
>
> ------------------------------
> You are receiving this mail because:
>
>    - You are the assignee for the bug.
>
>
> _______________________________________________
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/nouveau
>
>
-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20160405/db0ba43a/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=94817

--- Comment #2 from nw9165-3201 at yahoo.com ---
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

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20160405/211d6397/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=94817

Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |NOTABUG
             Status|NEW                         |RESOLVED

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(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.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20160405/46e23e59/attachment.html>