[Intel-gfx] [PATCH v4 3/8] drm/i915/selftests: Add live vma selftest

[Chris Wilson]

Quoting Ville Syrjala (2019-01-24 19:11:57)
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Add a live selftest to excercise rotated/remapped vmas. We simply
> write through the rotated/remapped vma, and confirm that the data
> appears in the right page when read through the normal vma.
> 
> Not sure what the fallout of making all rotated/remapped vmas
> mappable/fenceable would be, hence I just hacked it in the test.
> 
> v2: Grab rpm reference (Chris)
>     GEM_BUG_ON(view.type not as expected) (Chris)
>     Allow CAN_FENCE for rotated/remapped vmas (Chris)
>     Update intel_plane_uses_fence() to ask for a fence
>     only for normal vmas on gen4+
> v3: Deal with intel_wakeref_t
> v4: Rebase
> 
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris