Add async display refresh to overlap CPU work

Introduces non-blocking display refresh methods that allow CPU work (like grayscale rendering) to overlap with the e-ink panel's refresh time. The async path starts the waveform and returns immediately, with the caller responsible for waiting via waitRefreshComplete(). Falls back to blocking refresh when fadingFix is enabled or the panel lacks deferral support.
2026-07-14 04:42:27 -04:00
parent 34e7ed249b
commit 17e4230068
6 changed files with 166 additions and 38 deletions
@@ -65,6 +65,18 @@ void HalDisplay::displayBuffer(HalDisplay::RefreshMode mode, bool turnOffScreen)
  einkDisplay.displayBuffer(convertRefreshMode(mode), turnOffScreen);
 }

+void HalDisplay::displayBufferAsync(HalDisplay::RefreshMode mode) {
+  if (gpio.deviceIsX3() && mode == RefreshMode::HALF_REFRESH) {
+    einkDisplay.requestResync(1);
+  }
+
+  einkDisplay.displayBufferAsyncNoShadow(convertRefreshMode(mode));
+}
+
+void HalDisplay::waitRefreshComplete() { einkDisplay.waitRefreshComplete(); }
+
+bool HalDisplay::supportsAsyncRefresh() const { return einkDisplay.supportsAsyncRefresh(); }
+
 void HalDisplay::refreshDisplay(HalDisplay::RefreshMode mode, bool turnOffScreen) {
  if (gpio.deviceIsX3() && mode == RefreshMode::HALF_REFRESH) {
    einkDisplay.requestResync(1);