diff --git a/drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c
index 5f26090b0c98..89585b31b985 100644
--- a/drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c
@@ -310,7 +310,7 @@ static void ipu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 		dev_warn(ipu_crtc->dev, "8-pixel align hactive %d -> %d\n",
 			 sig_cfg.mode.hactive, new_hactive);
 
-		sig_cfg.mode.hfront_porch = new_hactive - sig_cfg.mode.hactive;
+		sig_cfg.mode.hfront_porch -= new_hactive - sig_cfg.mode.hactive;
 		sig_cfg.mode.hactive = new_hactive;
 	}
 
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
index 102e1fc7ee38..be4ec5bb5223 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
@@ -569,6 +569,7 @@ static const struct of_device_id s6d7aa0_of_match[] = {
 	},
 	{ /* sentinel */ }
 };
+MODULE_DEVICE_TABLE(of, s6d7aa0_of_match);
 
 static struct mipi_dsi_driver s6d7aa0_driver = {
 	.probe = s6d7aa0_probe,
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 7139a522b2f3..54e3083076b7 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -519,7 +519,8 @@ static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
 
 	if (bo->pin_count) {
 		*locked = false;
-		*busy = false;
+		if (busy)
+			*busy = false;
 		return false;
 	}