From ffeee5c91b854e73f7f20d2396b01af54dd78ee1 Mon Sep 17 00:00:00 2001
From: Willem Melching <willem.melching@gmail.com>
Date: Tue, 19 Jan 2021 14:56:56 +0100
Subject: [PATCH] qt ui: sync fps with camera

old-commit-hash: 978d0c8964fb3cc0c3c1a9241b6c4bb1fdbad5c9
---
 selfdrive/ui/qt/home.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/selfdrive/ui/qt/home.cc b/selfdrive/ui/qt/home.cc
index 2315af4e50..d388490d64 100644
--- a/selfdrive/ui/qt/home.cc
+++ b/selfdrive/ui/qt/home.cc
@@ -251,6 +251,10 @@ void GLWindow::timerUpdate() {
   if (ui_state.started != onroad) {
     onroad = ui_state.started;
     emit offroadTransition(!onroad);
+
+    // Change timeout to 0 when onroad, this will call timerUpdate continously.
+    // This puts visionIPC in charge of update frequency, reducing video latency
+    timer->start(onroad ? 0 : 1000 / UI_FREQ);
   }
 
   handle_display_state(&ui_state, false);