diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
index 96daec6..c64876e 100644
--- a/Source/WebKit/ChangeLog
+++ b/Source/WebKit/ChangeLog
@@ -1,3 +1,31 @@
+2022-01-26  Alexander Mikhaylenko  <alexm@gnome.org>
+
+        [GTK] REGRESSION: Touch scrolling is broken
+        https://bugs.webkit.org/show_bug.cgi?id=235436
+
+        Reviewed by Chris Lord.
+
+        Remove webkitWebViewBaseSetWheelHasPreciseDeltas(), instead add a parameter
+        to webkitWebViewBaseSynthesizeWheelEvent() that specifies whether the event
+        should have precise deltas or not.
+
+        Correct the touch swipe velocity, since it won't get multiplied by
+        pixelsPerLineStep().
+
+        * UIProcess/API/gtk/PageClientImpl.cpp:
+        (WebKit::PageClientImpl::navigationGestureDidBegin):
+        * UIProcess/API/gtk/WebKitWebViewBase.cpp:
+        (webkitWebViewBaseZoomBegin):
+        (webkitWebViewBaseTouchDragBegin):
+        (webkitWebViewBaseTouchDragUpdate):
+        (webkitWebViewBaseTouchSwipe):
+        (webkitWebViewBaseSynthesizeWheelEvent):
+        (webkitWebViewBaseSetWheelHasPreciseDeltas): Deleted.
+        * UIProcess/API/gtk/WebKitWebViewBaseInternal.h:
+        * UIProcess/API/gtk/WebKitWebViewBasePrivate.h:
+        * UIProcess/Automation/gtk/WebAutomationSessionGtk.cpp:
+        (WebKit::WebAutomationSession::platformSimulateWheelInteraction):
+
 2022-01-25  Chris Dumez  <cdumez@apple.com>
 
         REGRESSION (iOS 15.2): Loading gets stuck after back-navigation involving COOP header
diff --git a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
index b89538b..5156fcf 100644
--- a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
+++ b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
@@ -474,7 +474,7 @@
 
 void PageClientImpl::navigationGestureDidBegin()
 {
-    webkitWebViewBaseSynthesizeWheelEvent(WEBKIT_WEB_VIEW_BASE(m_viewWidget), 0, 0, 0, 0, WheelEventPhase::Began, WheelEventPhase::NoPhase);
+    webkitWebViewBaseSynthesizeWheelEvent(WEBKIT_WEB_VIEW_BASE(m_viewWidget), 0, 0, 0, 0, WheelEventPhase::Began, WheelEventPhase::NoPhase, true);
 }
 
 void PageClientImpl::navigationGestureWillEnd(bool, WebBackForwardListItem&)
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp
index 559a89b..b251c62 100644
--- a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp
@@ -284,7 +284,6 @@
     TouchEventsMap touchEvents;
     IntSize contentsSize;
     std::optional<MotionEvent> lastMotionEvent;
-    bool wheelHasPreciseDeltas { false };
     bool isBlank;
     bool shouldNotifyFocusEvents { true };
 
@@ -1842,7 +1841,7 @@
 
     auto* event = gtk_gesture_get_last_event(gesture, sequence);
 
-    webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, 0, 0, x, y, WheelEventPhase::Began, WheelEventPhase::NoPhase);
+    webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, 0, 0, x, y, WheelEventPhase::Began, WheelEventPhase::NoPhase, true);
 }
 
 static void webkitWebViewBaseZoomChanged(WebKitWebViewBase* webViewBase, gdouble scale, GtkGesture* gesture)
@@ -1922,7 +1921,7 @@
     auto* sequence = gtk_gesture_single_get_current_sequence(GTK_GESTURE_SINGLE(gesture));
     auto* event = gtk_gesture_get_last_event(gesture, sequence);
 
-    webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, 0, 0, startX, startY, WheelEventPhase::Began, WheelEventPhase::NoPhase);
+    webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, 0, 0, startX, startY, WheelEventPhase::Began, WheelEventPhase::NoPhase, true);
 }
 
 static void webkitWebViewBaseTouchDragUpdate(WebKitWebViewBase* webViewBase, double offsetX, double offsetY, GtkGesture* gesture)
@@ -1949,26 +1948,26 @@
             webkitWebViewBaseSynthesizeMouseEvent(webViewBase, MouseEventType::Motion, 0, 0, x, y, modifiers, 1, mousePointerEventType());
             webkitWebViewBaseSynthesizeMouseEvent(webViewBase, MouseEventType::Press, GDK_BUTTON_PRIMARY, 0, x, y, modifiers, 0, mousePointerEventType());
         } else
-            webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, 0, 0, x, y, WheelEventPhase::Began, WheelEventPhase::NoPhase);
+            webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, 0, 0, x, y, WheelEventPhase::Began, WheelEventPhase::NoPhase, true);
     }
 
     if (priv->isLongPressed)
         webkitWebViewBaseSynthesizeMouseEvent(webViewBase, MouseEventType::Motion, GDK_BUTTON_PRIMARY, GDK_BUTTON1_MASK, x + offsetX, y + offsetY, modifiers, 0, mousePointerEventType());
     else {
-        double deltaX = (priv->dragOffset.x() - offsetX) / Scrollbar::pixelsPerLineStep();
-        double deltaY = (priv->dragOffset.y() - offsetY) / Scrollbar::pixelsPerLineStep();
+        double deltaX = priv->dragOffset.x() - offsetX;
+        double deltaY = priv->dragOffset.y() - offsetY;
         priv->dragOffset.set(offsetX, offsetY);
 
         ViewGestureController* controller = webkitWebViewBaseViewGestureController(webViewBase);
         if (controller && controller->isSwipeGestureEnabled()) {
-            FloatSize delta(deltaX, deltaY);
+            FloatSize delta(deltaX / Scrollbar::pixelsPerLineStep(), deltaY / Scrollbar::pixelsPerLineStep());
             int32_t eventTime = static_cast<int32_t>(gtk_event_controller_get_current_event_time(GTK_EVENT_CONTROLLER(gesture)));
             PlatformGtkScrollData scrollData = { .delta = delta, .eventTime = eventTime, .source = GDK_SOURCE_TOUCHSCREEN, .isEnd = false };
             if (controller->handleScrollWheelEvent(&scrollData))
                 return;
         }
 
-        webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, -deltaX, -deltaY, x, y, WheelEventPhase::Changed, WheelEventPhase::NoPhase);
+        webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, -deltaX, -deltaY, x, y, WheelEventPhase::Changed, WheelEventPhase::NoPhase, true);
     }
 }
 
@@ -2011,7 +2010,7 @@
                 return;
         }
 
-        webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, -velocityX / Scrollbar::pixelsPerLineStep(), velocityY / Scrollbar::pixelsPerLineStep(), x, y, WheelEventPhase::NoPhase, WheelEventPhase::Began);
+        webkitWebViewBaseSynthesizeWheelEvent(webViewBase, event, -velocityX, -velocityY, x, y, WheelEventPhase::NoPhase, WheelEventPhase::Began, true);
     }
 }
 
@@ -3000,12 +2999,12 @@
     RELEASE_ASSERT_NOT_REACHED();
 }
 
-void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase* webViewBase, double deltaX, double deltaY, int x, int y, WheelEventPhase phase, WheelEventPhase momentumPhase)
+void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase* webViewBase, double deltaX, double deltaY, int x, int y, WheelEventPhase phase, WheelEventPhase momentumPhase, bool hasPreciseDeltas)
 {
-    webkitWebViewBaseSynthesizeWheelEvent(webViewBase, nullptr, deltaX, deltaY, x, y, phase, momentumPhase);
+    webkitWebViewBaseSynthesizeWheelEvent(webViewBase, nullptr, deltaX, deltaY, x, y, phase, momentumPhase, hasPreciseDeltas);
 }
 
-void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase* webViewBase, const GdkEvent* event, double deltaX, double deltaY, int x, int y, WheelEventPhase phase, WheelEventPhase momentumPhase)
+void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase* webViewBase, const GdkEvent* event, double deltaX, double deltaY, int x, int y, WheelEventPhase phase, WheelEventPhase momentumPhase, bool hasPreciseDeltas)
 {
     WebKitWebViewBasePrivate* priv = webViewBase->priv;
     if (priv->dialog)
@@ -3013,16 +3012,11 @@
 
     FloatSize wheelTicks(deltaX, deltaY);
     FloatSize delta(wheelTicks);
-    if (!priv->wheelHasPreciseDeltas)
+    if (!hasPreciseDeltas)
         delta.scale(static_cast<float>(Scrollbar::pixelsPerLineStep()));
 
     priv->pageProxy->handleWheelEvent(NativeWebWheelEvent(const_cast<GdkEvent*>(event), { x, y }, widgetRootCoords(GTK_WIDGET(webViewBase), x, y),
-        delta, wheelTicks, toWebKitWheelEventPhase(phase), toWebKitWheelEventPhase(momentumPhase), priv->wheelHasPreciseDeltas));
-}
-
-void webkitWebViewBaseSetWheelHasPreciseDeltas(WebKitWebViewBase* webViewBase, bool hasPreciseDeltas)
-{
-    webViewBase->priv->wheelHasPreciseDeltas = hasPreciseDeltas;
+        delta, wheelTicks, toWebKitWheelEventPhase(phase), toWebKitWheelEventPhase(momentumPhase), true));
 }
 
 void webkitWebViewBaseMakeBlank(WebKitWebViewBase* webViewBase, bool makeBlank)
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBaseInternal.h b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBaseInternal.h
index 04de840..aa03441 100644
--- a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBaseInternal.h
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBaseInternal.h
@@ -44,6 +44,5 @@
 WK_EXPORT void webkitWebViewBaseSynthesizeKeyEvent(WebKitWebViewBase*, KeyEventType, unsigned keyVal, unsigned modifiers, ShouldTranslateKeyboardState);
 
 enum class WheelEventPhase { NoPhase, Began, Changed, Ended, Cancelled, MayBegin };
-WK_EXPORT void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase*, double deltaX, double deltaY, int x, int y, WheelEventPhase, WheelEventPhase momentumPhase);
-WK_EXPORT void webkitWebViewBaseSetWheelHasPreciseDeltas(WebKitWebViewBase*, bool);
+WK_EXPORT void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase*, double deltaX, double deltaY, int x, int y, WheelEventPhase, WheelEventPhase momentumPhase, bool);
 
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h
index 187df5e..9a1b30d 100644
--- a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h
@@ -114,7 +114,7 @@
 void webkitWebViewBaseSetInputMethodContext(WebKitWebViewBase*, WebKitInputMethodContext*);
 WebKitInputMethodContext* webkitWebViewBaseGetInputMethodContext(WebKitWebViewBase*);
 void webkitWebViewBaseSynthesizeCompositionKeyPress(WebKitWebViewBase*, const String& text, std::optional<Vector<WebCore::CompositionUnderline>>&&, std::optional<WebKit::EditingRange>&&);
-void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase*, const GdkEvent*, double deltaX, double deltaY, int x, int y, WheelEventPhase, WheelEventPhase momentumPhase);
+void webkitWebViewBaseSynthesizeWheelEvent(WebKitWebViewBase*, const GdkEvent*, double deltaX, double deltaY, int x, int y, WheelEventPhase, WheelEventPhase momentumPhase, bool hasPreciseDeltas);
 
 void webkitWebViewBaseMakeBlank(WebKitWebViewBase*, bool);
 void webkitWebViewBasePageGrabbedTouch(WebKitWebViewBase*);
diff --git a/Source/WebKit/UIProcess/Automation/gtk/WebAutomationSessionGtk.cpp b/Source/WebKit/UIProcess/Automation/gtk/WebAutomationSessionGtk.cpp
index 5612dd5..10b853d 100644
--- a/Source/WebKit/UIProcess/Automation/gtk/WebAutomationSessionGtk.cpp
+++ b/Source/WebKit/UIProcess/Automation/gtk/WebAutomationSessionGtk.cpp
@@ -335,7 +335,7 @@
     auto* viewWidget = reinterpret_cast<WebKitWebViewBase*>(page.viewWidget());
     FloatSize scrollDelta(delta);
     scrollDelta.scale(1 / static_cast<float>(Scrollbar::pixelsPerLineStep()));
-    webkitWebViewBaseSynthesizeWheelEvent(viewWidget, -scrollDelta.width(), -scrollDelta.height(), locationInViewport.x(), locationInViewport.y(), WheelEventPhase::NoPhase, WheelEventPhase::NoPhase);
+    webkitWebViewBaseSynthesizeWheelEvent(viewWidget, -scrollDelta.width(), -scrollDelta.height(), locationInViewport.x(), locationInViewport.y(), WheelEventPhase::NoPhase, WheelEventPhase::NoPhase, false);
 }
 #endif // ENABLE(WEBDRIVER_WHEEL_INTERACTIONS)
 
diff --git a/Tools/ChangeLog b/Tools/ChangeLog
index 07e014f..d1cd49d 100644
--- a/Tools/ChangeLog
+++ b/Tools/ChangeLog
@@ -1,3 +1,21 @@
+2022-01-26  Alexander Mikhaylenko  <alexm@gnome.org>
+
+        [GTK] REGRESSION: Touch scrolling is broken
+        https://bugs.webkit.org/show_bug.cgi?id=235436
+
+        Reviewed by Chris Lord.
+
+        Stop using webkitWebViewBaseSetWheelHasPreciseDeltas(), instead pass the correct parameter into
+        webkitWebViewBaseSynthesizeWheelEvent().
+
+        * WebKitTestRunner/EventSenderProxy.h:
+        * WebKitTestRunner/gtk/EventSenderProxyGtk.cpp:
+        (WTR::EventSenderProxy::~EventSenderProxy):
+        (WTR::EventSenderProxy::mouseScrollBy):
+        (WTR::EventSenderProxy::continuousMouseScrollBy):
+        (WTR::EventSenderProxy::mouseScrollByWithWheelAndMomentumPhases):
+        (WTR::EventSenderProxy::setWheelHasPreciseDeltas):
+
 2022-01-25  Chris Dumez  <cdumez@apple.com>
 
         REGRESSION (iOS 15.2): Loading gets stuck after back-navigation involving COOP header
diff --git a/Tools/WebKitTestRunner/EventSenderProxy.h b/Tools/WebKitTestRunner/EventSenderProxy.h
index d34a86d..adb9c3d23 100644
--- a/Tools/WebKitTestRunner/EventSenderProxy.h
+++ b/Tools/WebKitTestRunner/EventSenderProxy.h
@@ -152,6 +152,9 @@
 #if PLATFORM(COCOA)
     int m_eventNumber { 0 };
 #endif
+#if PLATFORM(GTK)
+    bool m_hasPreciseDeltas { false };
+#endif
 #if PLATFORM(WPE)
     uint32_t m_buttonState { 0 };
     Vector<struct wpe_input_touch_event_raw> m_touchEvents;
diff --git a/Tools/WebKitTestRunner/gtk/EventSenderProxyGtk.cpp b/Tools/WebKitTestRunner/gtk/EventSenderProxyGtk.cpp
index 2683ee8..01cf43f 100644
--- a/Tools/WebKitTestRunner/gtk/EventSenderProxyGtk.cpp
+++ b/Tools/WebKitTestRunner/gtk/EventSenderProxyGtk.cpp
@@ -77,7 +77,6 @@
 
 EventSenderProxy::~EventSenderProxy()
 {
-    webkitWebViewBaseSetWheelHasPreciseDeltas(toWebKitGLibAPI(m_testController->mainWebView()->platformView()), false);
 }
 
 static unsigned eventSenderButtonToGDKButton(unsigned button)
@@ -298,7 +297,7 @@
         return;
 
     webkitWebViewBaseSynthesizeWheelEvent(toWebKitGLibAPI(m_testController->mainWebView()->platformView()),
-        horizontal, vertical, m_position.x, m_position.y, WheelEventPhase::NoPhase, WheelEventPhase::NoPhase);
+        horizontal, vertical, m_position.x, m_position.y, WheelEventPhase::NoPhase, WheelEventPhase::NoPhase, m_hasPreciseDeltas);
 }
 
 void EventSenderProxy::continuousMouseScrollBy(int horizontal, int vertical, bool paged)
@@ -310,7 +309,7 @@
     }
 
     webkitWebViewBaseSynthesizeWheelEvent(toWebKitGLibAPI(m_testController->mainWebView()->platformView()),
-        horizontal / pixelsPerScrollTick, vertical / pixelsPerScrollTick, m_position.x, m_position.y, WheelEventPhase::NoPhase, WheelEventPhase::NoPhase);
+        horizontal / pixelsPerScrollTick, vertical / pixelsPerScrollTick, m_position.x, m_position.y, WheelEventPhase::NoPhase, WheelEventPhase::NoPhase, m_hasPreciseDeltas);
 }
 
 void EventSenderProxy::mouseScrollByWithWheelAndMomentumPhases(int horizontal, int vertical, int phase, int momentum)
@@ -354,12 +353,12 @@
     }
 
     webkitWebViewBaseSynthesizeWheelEvent(toWebKitGLibAPI(m_testController->mainWebView()->platformView()),
-        horizontal, vertical, m_position.x, m_position.y, eventPhase, eventMomentumPhase);
+        horizontal, vertical, m_position.x, m_position.y, eventPhase, eventMomentumPhase, m_hasPreciseDeltas);
 }
 
 void EventSenderProxy::setWheelHasPreciseDeltas(bool hasPreciseDeltas)
 {
-    webkitWebViewBaseSetWheelHasPreciseDeltas(toWebKitGLibAPI(m_testController->mainWebView()->platformView()), hasPreciseDeltas);
+    m_hasPreciseDeltas = hasPreciseDeltas;
 }
 
 void EventSenderProxy::leapForward(int milliseconds)