From 2c77eedbc7d668d128af3bec2633d55e01c9e67c Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 5 Feb 2018 18:53:18 +0000
Subject: [PATCH 190/454] drm/vc4: Don't wait for vblank on fkms cursor
 updates.

We don't use the same async update path between fkms and normal kms,
and the normal kms workaround ended up making us wait.  This became a
larger problem in rpi-4.14.y, as the USB HID update rate throttling
got (accidentally?) dropped.

Signed-off-by: Eric Anholt <eric@anholt.net>
---
 drivers/gpu/drm/vc4/vc4_kms.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -53,7 +53,8 @@ vc4_atomic_complete_commit(struct drm_at
 	 * display lists before we free it and potentially reallocate
 	 * and overwrite the dlist memory with a new modeset.
 	 */
-	state->legacy_cursor_update = false;
+	if (!vc4->firmware_kms)
+		state->legacy_cursor_update = false;
 
 	drm_atomic_helper_commit_hw_done(state);
 
