drm/i915: Fix ordering of sanitize ppgtt and sanitize execlists

The i915.enable_ppgtt option depends upon the state of
i915.enable_execlists option - so we need to sanitize execlists first.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461932305-14637-2-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index f69330c..c91387f1 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -968,6 +968,19 @@
 			 info->has_subslice_pg ? "y" : "n");
 	DRM_DEBUG_DRIVER("has EU power gating: %s\n",
 			 info->has_eu_pg ? "y" : "n");
+
+	i915.enable_execlists =
+		intel_sanitize_enable_execlists(dev, i915.enable_execlists);
+
+	/*
+	 * i915.enable_ppgtt is read-only, so do an early pass to validate the
+	 * user's requested state against the hardware/driver capabilities.  We
+	 * do this now so that we can print out any log messages once rather
+	 * than every time we check intel_enable_ppgtt().
+	 */
+	i915.enable_ppgtt =
+		intel_sanitize_enable_ppgtt(dev, i915.enable_ppgtt);
+	DRM_DEBUG_DRIVER("ppgtt mode: %i\n", i915.enable_ppgtt);
 }
 
 static void intel_init_dpio(struct drm_i915_private *dev_priv)