drm/i915/fbdev: Call intel_unpin_fb_obj() on release

When releasing the intel_fbdev, we should unpin the framebuffer that we
pinned during construction.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1461833819-3991-1-git-send-email-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/intel_display.c

@@ -2310,7 +2310,7 @@ err_pm:
 	return ret;
 }
 
-static void intel_unpin_fb_obj(struct drm_framebuffer *fb, unsigned int rotation)
+void intel_unpin_fb_obj(struct drm_framebuffer *fb, unsigned int rotation)
 {
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
 	struct i915_ggtt_view view;

drivers/gpu/drm/i915/intel_drv.h

@@ -1163,6 +1163,7 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
 				    struct drm_modeset_acquire_ctx *ctx);
 int intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
 			       unsigned int rotation);
+void intel_unpin_fb_obj(struct drm_framebuffer *fb, unsigned int rotation);
 struct drm_framebuffer *
 __intel_framebuffer_create(struct drm_device *dev,
 			   struct drm_mode_fb_cmd2 *mode_cmd,

drivers/gpu/drm/i915/intel_fbdev.c

@@ -287,7 +287,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
 out_destroy_fbi:
 	drm_fb_helper_release_fbi(helper);
 out_unpin:
-	i915_gem_object_ggtt_unpin(obj);
+	intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
 out_unlock:
 	mutex_unlock(&dev->struct_mutex);
 	return ret;
@@ -551,6 +551,11 @@ static void intel_fbdev_destroy(struct drm_device *dev,
 
 	if (ifbdev->fb) {
 		drm_framebuffer_unregister_private(&ifbdev->fb->base);
+
+		mutex_lock(&dev->struct_mutex);
+		intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
+		mutex_unlock(&dev->struct_mutex);
+
 		drm_framebuffer_remove(&ifbdev->fb->base);
 	}
 }