drm/i915: Move load time PCH detect, DPIO, power domain SW init earlier

These are all SW only init steps not accessing the device and they only
need the platform identification macros to work, which are already
available earlier, so move these init steps earlier.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-3-git-send-email-imre.deak@intel.com

drivers/gpu/drm/i915/i915_dma.c

@@ -1020,7 +1020,12 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	if (ret < 0)
 		goto out_free_priv;
 
+	/* This must be called before any calls to HAS_PCH_* */
+	intel_detect_pch(dev);
+
 	intel_pm_setup(dev);
+	intel_init_dpio(dev_priv);
+	intel_power_domains_init(dev_priv);
 
 	intel_runtime_pm_get(dev_priv);
 
@@ -1045,9 +1050,6 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	if (ret < 0)
 		goto put_bridge;
 
-	/* This must be called before any calls to HAS_PCH_* */
-	intel_detect_pch(dev);
-
 	intel_uncore_init(dev);
 
 	ret = i915_gem_gtt_init(dev);
@@ -1124,16 +1126,12 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 
 	intel_device_info_runtime_init(dev);
 
-	intel_init_dpio(dev_priv);
-
 	if (INTEL_INFO(dev)->num_pipes) {
 		ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes);
 		if (ret)
 			goto out_gem_unload;
 	}
 
-	intel_power_domains_init(dev_priv);
-
 	ret = i915_load_modeset_init(dev);
 	if (ret < 0) {
 		DRM_ERROR("failed to init modeset\n");