drm/i915: Fix RC6 suspend/resume

We restored RC6 twice on resume, even with modesetting off.  Instead,
only restore it once and skip RC6 initialization entirely in non-KMS mode.

Signed-off-by: Andy Lutomirski <luto@mit.edu>
Tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c21dede6461c..089b1df5448b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4593,7 +4593,7 @@ void intel_init_clock_gating(struct drm_device *dev)
          * GPU can automatically power down the render unit if given a page
          * to save state.
          */
-        if (I915_HAS_RC6(dev)) {
+        if (I915_HAS_RC6(dev) && drm_core_check_feature(dev, DRIVER_MODESET)) {
                 struct drm_gem_object *pwrctx;
                 struct drm_i915_gem_object *obj_priv;
                 int ret;