[Intel-gfx] [PATCH v3 4/5] drm/i915: cpu-map based dumb buffers

[Chris Wilson]

Quoting Abdiel Janulgue (2019-10-15 09:37:23)
> +int
> +i915_gem_mmap_dumb(struct drm_file *file,
> +                 struct drm_device *dev,
> +                 u32 handle,
> +                 u64 *offset)
> +{
> +       struct drm_i915_private *i915 = to_i915(dev);
> +       enum i915_mmap_type mmap_type = HAS_MAPPABLE_APERTURE(i915) ?
> +               I915_MMAP_TYPE_GTT : I915_MMAP_TYPE_WC;

Is there any reason to prefer GTT at all?
-Chris