From dd5fa07672eb01a4d90dfa39a4c54eaa0e086386 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 5 Feb 2018 18:53:18 +0000
Subject: [PATCH] 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
@@ -222,7 +222,8 @@ static int vc4_atomic_commit(struct drm_
 	 * drm_atomic_helper_setup_commit() from auto-completing
 	 * commit->flip_done.
 	 */
-	state->legacy_cursor_update = false;
+	if (!vc4->firmware_kms)
+		state->legacy_cursor_update = false;
 	ret = drm_atomic_helper_setup_commit(state, nonblock);
 	if (ret)
 		return ret;
