faster driverview start (#20507)

old-commit-hash: 32c4cf00c2d6bac059516cc44494808cf5a408ca

selfdrive/ui/paint.cc

@@ -396,6 +396,11 @@ void ui_draw(UIState *s) {
   if (draw_alerts && s->scene.alert_size != cereal::ControlsState::AlertSize::NONE) {
     ui_draw_vision_alert(s);
   }
+
+  if (s->scene.driver_view && !s->vipc_client->connected) {
+    nvgTextAlign(s->vg, NVG_ALIGN_CENTER | NVG_ALIGN_MIDDLE);
+    ui_draw_text(s, s->viz_rect.centerX(), s->viz_rect.centerY(), "Please wait for camera to start", 40 * 2.5, COLOR_WHITE, "sans-bold");
+  }
   nvgEndFrame(s->vg);
   glDisable(GL_BLEND);
 }

selfdrive/ui/qt/home.cc

@@ -52,6 +52,7 @@ void HomeWindow::mousePressEvent(QMouseEvent* e) {
   UIState* ui_state = &glWindow->ui_state;
   if (GLWindow::ui_state.scene.driver_view) {
     Params().write_db_value("IsDriverViewEnabled", "0", 1);
+    GLWindow::ui_state.scene.driver_view = false;
     return;
   }
 

selfdrive/ui/qt/offroad/settings.cc

@@ -15,7 +15,7 @@
 #include "common/params.h"
 #include "common/util.h"
 #include "selfdrive/hardware/hw.h"
-
+#include "home.hpp"
 
 QWidget * toggles_panel() {
   QVBoxLayout *toggles_list = new QVBoxLayout();
@@ -86,7 +86,10 @@ DevicePanel::DevicePanel(QWidget* parent) : QWidget(parent) {
 
   offroad_btns.append(new ButtonControl("Driver Camera", "PREVIEW",
                                    "Preview the driver facing camera to help optimize device mounting position for best driver monitoring experience. (vehicle must be off)",
-                                   [=]() { Params().write_db_value("IsDriverViewEnabled", "1", 1); }));
+                                   [=]() { 
+                                      Params().write_db_value("IsDriverViewEnabled", "1", 1);
+                                      GLWindow::ui_state.scene.driver_view = true; }
+                                    ));
 
   offroad_btns.append(new ButtonControl("Reset Calibration", "RESET",
                                    "openpilot requires the device to be mounted within 4° left or right and within 5° up or down. openpilot is continuously calibrating, resetting is rarely required.", [=]() {

selfdrive/ui/ui.cc

@@ -205,11 +205,6 @@ static void update_sockets(UIState *s) {
   }
   if (sm.updated("driverMonitoringState")) {
     scene.dmonitoring_state = sm["driverMonitoringState"].getDriverMonitoringState();
-    if(!scene.driver_view && !scene.ignition) {
-      read_param(&scene.driver_view, "IsDriverViewEnabled");
-    }
-  } else if ((sm.frame - sm.rcv_frame("driverMonitoringState")) > UI_FREQ/2) {
-    scene.driver_view = false;
   }
   if (sm.updated("sensorEvents")) {
     for (auto sensor : sm["sensorEvents"].getSensorEvents()) {