diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index 09ec8b0eafee..126efbf89898 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -452,7 +452,7 @@ static void venc_runtime_put(struct venc_device *venc)
 	WARN_ON(r < 0 && r != -ENOSYS);
 }
 
-static const struct venc_config *venc_timings_to_config(struct videomode *vm)
+static const struct venc_config *venc_timings_to_config(const struct videomode *vm)
 {
 	switch (venc_get_videomode(vm)) {
 	default:
@@ -582,28 +582,16 @@ static void venc_set_timings(struct omap_dss_device *dssdev,
 			     const struct videomode *vm)
 {
 	struct venc_device *venc = dssdev_to_venc(dssdev);
-	struct videomode actual_vm;
 
 	DSSDBG("venc_set_timings\n");
 
 	mutex_lock(&venc->venc_lock);
 
-	switch (venc_get_videomode(vm)) {
-	default:
-		WARN_ON_ONCE(1);
-	case VENC_MODE_PAL:
-		actual_vm = omap_dss_pal_vm;
-		break;
-	case VENC_MODE_NTSC:
-		actual_vm = omap_dss_ntsc_vm;
-		break;
-	}
-
 	/* Reset WSS data when the TV standard changes. */
-	if (memcmp(&venc->vm, &actual_vm, sizeof(actual_vm)))
+	if (memcmp(&venc->vm, vm, sizeof(*vm)))
 		venc->wss_data = 0;
 
-	venc->vm = actual_vm;
+	venc->vm = *vm;
 
 	dispc_set_tv_pclk(venc->dss->dispc, 13500000);
 
@@ -617,8 +605,13 @@ static int venc_check_timings(struct omap_dss_device *dssdev,
 
 	switch (venc_get_videomode(vm)) {
 	case VENC_MODE_PAL:
-	case VENC_MODE_NTSC:
+		*vm = omap_dss_pal_vm;
 		return 0;
+
+	case VENC_MODE_NTSC:
+		*vm = omap_dss_ntsc_vm;
+		return 0;
+
 	default:
 		return -EINVAL;
 	}