[Intel-gfx] [PATCH v2 1/6] drm/i915: Add a new "remapped" gtt_view

[Chris Wilson]

Quoting Ville Syrjälä (2019-01-15 13:43:41)
> On Mon, Jan 14, 2019 at 09:55:10AM +0000, Tvrtko Ursulin wrote:
> > 
> > On 11/01/2019 19:46, Ville Syrjala wrote:
> > > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > 
> > > To overcome display engine stride limits we'll want to remap the
> > > pages in the GTT. To that end we need a new gtt_view type which
> > > is just like the "rotated" type except not rotated.
> > 
> > I think I asked this before, so sorry if you also answered it - what 
> > about rotated setups which go over display engine stride limits?
> 
> We already have the code to do the rotated mapping.

The worry, that I think Tvrtko shared, is whether the simple formula for
the rotated view could accommodate a rotated, remapped view. Oh, of
course it works out, the rotated view is already calculated on a per-CRTC
subset. Worry not.
-Chris