drm/i915: overlay: extract some duplicated code

I've suspected some bug there wrt to suspend, but that was not
the case. Clean up the code anyway.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index f1bf0b0c204c5e1a2001e0bb595d1ae2fb1769ce..b97c5c562aa1445cd575b96b3ec9b73ad19d01f6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -375,12 +375,28 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        if (ret != 0)
                return ret;
 
-       overlay->active = 0;
        overlay->hw_wedged = 0;
        overlay->last_flip_req = 0;
        return ret;
 }
 
+static void intel_overlay_off_tail(struct intel_overlay *overlay)
+{
+       struct drm_gem_object *obj;
+
+       /* never have the overlay hw on without showing a frame */
+       BUG_ON(!overlay->vid_bo);
+       obj = overlay->vid_bo->obj;
+
+       i915_gem_object_unpin(obj);
+       drm_gem_object_unreference(obj);
+       overlay->vid_bo = NULL;
+
+       overlay->crtc->overlay = NULL;
+       overlay->crtc = NULL;
+       overlay->active = 0;
+}
+
 /* recover from an interruption due to a signal
  * We have to be careful not to repeat work forever an make forward progess. */
 int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
@@ -438,17 +454,7 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
                                return ret;
 
                case SWITCH_OFF_STAGE_2:
-                       BUG_ON(!overlay->vid_bo);
-                       obj = overlay->vid_bo->obj;
-
-                       i915_gem_object_unpin(obj);
-                       drm_gem_object_unreference(obj);
-                       overlay->vid_bo = NULL;
-
-                       overlay->crtc->overlay = NULL;
-                       overlay->crtc = NULL;
-
-                       overlay->active = 0;
+                       intel_overlay_off_tail(overlay);
                        break;
                default:
                        BUG_ON(overlay->hw_wedged != NEEDS_WAIT_FOR_FLIP);
@@ -831,7 +837,6 @@ int intel_overlay_switch_off(struct intel_overlay *overlay)
 {
        int ret;
        struct overlay_registers *regs;
-       struct drm_gem_object *obj;
        struct drm_device *dev = overlay->dev;
 
        BUG_ON(!mutex_is_locked(&dev->struct_mutex));
@@ -855,16 +860,7 @@ int intel_overlay_switch_off(struct intel_overlay *overlay)
        if (ret != 0)
                return ret;
 
-       /* never have the overlay hw on without showing a frame */
-       BUG_ON(!overlay->vid_bo);
-       obj = overlay->vid_bo->obj;
-
-       i915_gem_object_unpin(obj);
-       drm_gem_object_unreference(obj);
-       overlay->vid_bo = NULL;
-
-       overlay->crtc->overlay = NULL;
-       overlay->crtc = NULL;
+       intel_overlay_off_tail(overlay);
 
        return 0;
 }