[Intel-gfx] [PATCH v9 6/6] drm/i915: expose rcs topology through query uAPI

[Chris Wilson]

Quoting Lionel Landwerlin (2018-01-18 14:45:31)
> +static int query_slice_info(struct drm_i915_private *dev_priv,
> +                           struct drm_i915_query_item *query_item)
> +{
> +       const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
> +       struct drm_i915_query_slice_info slice_info;
> +
> +       if (query_item->flags != 0)
> +               return -EINVAL;
> +
> +       if (sseu->max_slices == 0)
> +               return -ENODEV;

So conclusion was to cancel all queries and not report a 0-length result
for unsupported? :)
-Chris