drm/i915: Disable runtime-pm using lowlevel functions if !HAS_RC6

If we cannot setup rc6, we cannot let the GPU suspend itself as it
cannot save its state (to a powercontext). As such, we must disable
runtime-pm, but we should do so using the low-level pm-runtime function
which leaves our own debugging functions intact (and continue to detect
errors in our runtime-pm handling should we ever be able to enable rc6).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180812223642.24865-3-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/intel_pm.c

@@ -26,6 +26,7 @@
  */
 
 #include <linux/cpufreq.h>
+#include <linux/pm_runtime.h>
 #include <drm/drm_plane_helper.h>
 #include "i915_drv.h"
 #include "intel_drv.h"
@@ -8181,7 +8182,7 @@ void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
 	 */
 	if (!sanitize_rc6(dev_priv)) {
 		DRM_INFO("RC6 disabled, disabling runtime PM support\n");
-		intel_runtime_pm_get(dev_priv);
+		pm_runtime_get(&dev_priv->drm.pdev->dev);
 	}
 
 	mutex_lock(&dev_priv->pcu_lock);
@@ -8233,7 +8234,7 @@ void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
 		valleyview_cleanup_gt_powersave(dev_priv);
 
 	if (!HAS_RC6(dev_priv))
-		intel_runtime_pm_put(dev_priv);
+		pm_runtime_put(&dev_priv->drm.pdev->dev);
 }
 
 /**