1 files changed, 30 insertions, 20 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 8f98e5a8c488..86124b131f4f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -290,6 +290,7 @@ nouveau_display_create(struct drm_device *dev)
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_disp *pdisp = nouveau_disp(drm->device);
 	struct nouveau_display *disp;
+	u32 pclass = dev->pdev->class >> 8;
 	int ret, gen;
 
 	disp = drm->display = kzalloc(sizeof(*disp), GFP_KERNEL);
@@ -360,23 +361,27 @@ nouveau_display_create(struct drm_device *dev)
 	drm_kms_helper_poll_init(dev);
 	drm_kms_helper_poll_disable(dev);
 
-	if (nv_device(drm->device)->card_type < NV_50)
-		ret = nv04_display_create(dev);
-	else
-	if (nv_device(drm->device)->card_type < NV_D0)
-		ret = nv50_display_create(dev);
-	else
-		ret = nvd0_display_create(dev);
-	if (ret)
-		goto disp_create_err;
-
-	if (dev->mode_config.num_crtc) {
-		ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (nouveau_modeset == 1 ||
+	    (nouveau_modeset < 0 && pclass == PCI_CLASS_DISPLAY_VGA)) {
+		if (nv_device(drm->device)->card_type < NV_50)
+			ret = nv04_display_create(dev);
+		else
+		if (nv_device(drm->device)->card_type < NV_D0)
+			ret = nv50_display_create(dev);
+		else
+			ret = nvd0_display_create(dev);
 		if (ret)
-			goto vblank_err;
+			goto disp_create_err;
+
+		if (dev->mode_config.num_crtc) {
+			ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+			if (ret)
+				goto vblank_err;
+		}
+
+		nouveau_backlight_init(dev);
 	}
 
-	nouveau_backlight_init(dev);
 	return 0;
 
 vblank_err:
@@ -395,7 +400,8 @@ nouveau_display_destroy(struct drm_device *dev)
 	nouveau_backlight_exit(dev);
 	drm_vblank_cleanup(dev);
 
-	disp->dtor(dev);
+	if (disp->dtor)
+		disp->dtor(dev);
 
 	drm_kms_helper_poll_fini(dev);
 	drm_mode_config_cleanup(dev);
@@ -530,9 +536,11 @@ nouveau_page_flip_reserve(struct nouveau_bo *old_bo,
 	if (ret)
 		goto fail;
 
-	ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
-	if (ret)
-		goto fail_unreserve;
+	if (likely(old_bo != new_bo)) {
+		ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
+		if (ret)
+			goto fail_unreserve;
+	}
 
 	return 0;
 
@@ -551,8 +559,10 @@ nouveau_page_flip_unreserve(struct nouveau_bo *old_bo,
 	nouveau_bo_fence(new_bo, fence);
 	ttm_bo_unreserve(&new_bo->bo);
 
-	nouveau_bo_fence(old_bo, fence);
-	ttm_bo_unreserve(&old_bo->bo);
+	if (likely(old_bo != new_bo)) {
+		nouveau_bo_fence(old_bo, fence);
+		ttm_bo_unreserve(&old_bo->bo);
+	}
 
 	nouveau_bo_unpin(old_bo);
 }