[Intel-gfx] [PATCH 1/3] drm: Introduce scaling filter mode property

[Ville Syrjälä]

On Tue, Oct 22, 2019 at 10:12:29AM +0000, Sharma, Shashank wrote:
> Hey Daniel, 
> 
> > -----Original Message-----
> > From: Daniel Vetter <daniel.vetter at ffwll.ch> On Behalf Of Daniel Vetter
> > Sent: Tuesday, October 22, 2019 3:39 PM
> > To: Sharma, Shashank <shashank.sharma at intel.com>
> > Cc: dri-devel at lists.freedesktop.org; intel-gfx at lists.freedesktop.org
> > Subject: Re: [Intel-gfx] [PATCH 1/3] drm: Introduce scaling filter mode property
> > 
> > On Tue, Oct 22, 2019 at 03:29:44PM +0530, Shashank Sharma wrote:
> > > This patch adds a scaling filter mode porperty to allow:
> > > - A driver/HW to showcase it's scaling filter capabilities.
> > > - A userspace to pick a desired effect while scaling.
> > >
> > > This option will be particularly useful in the scenarios where Integer
> > > mode scaling is possible, and a UI client wants to pick filters like
> > > Nearest-neighbor applied for non-blurry outputs.
> > >
> > > There was a RFC patch series published, to discus the request to
> > > enable Integer mode scaling by some of the gaming communities, which
> > > can be found here:
> > > https://patchwork.freedesktop.org/series/66175/
> > >
> > > Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
> > 
> > Two things:
> > 
> > - needs real property docs for this in the kms property chapter
> Got it, 
> > - would be good if we could somehow subsume the panel fitter prop into
> >   this? Or at least document possible interactions with that.
> > 
> Sure, let me see what can I do here. 

The scaling mode prop has nothing really to do with the filter being
used. The scaling mode prop just provides a bad mechanism for
configuring the destination coordinates of the scaler.

Trying to shoehorn these things into one prop would be a mistake IMO.

-- 
Ville Syrjälä
Intel