Need to pull in commit from drm-next (earlier in drm-intel-next):
1eca0778f4b3 ("drm/i915: add struct i915_dsm to wrap dsm members together")
In order to merge following patch to drm-intel-gt-next:
https://patchwork.freedesktop.org/patch/530942/?series=114925&rev=6
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
 
         */
        if (IS_ENABLED(CONFIG_FRAMEBUFFER_CONSOLE) &&
            mem == i915->mm.stolen_region &&
-           size * 2 > i915->stolen_usable_size)
+           size * 2 > i915->dsm.usable_size)
                return NULL;
  
 -      obj = i915_gem_object_create_region_at(mem, phys_base, size, 0);
 +      obj = i915_gem_object_create_region_at(mem, phys_base, size,
 +                                             I915_BO_ALLOC_USER |
 +                                             I915_BO_PREALLOC);
        if (IS_ERR(obj))
                return NULL;