Add async display refresh support to HalDisplay

Introduces non-blocking refresh capability with displayBufferAsync() that starts panel waveform and returns immediately, plus waitRefreshComplete() to block until refresh finishes. Panels without async support fall back to blocking refresh. Requires framebuffer to remain untouched during refresh and differential baseline rebuild before next update.
2026-07-13 16:20:20 -04:00
parent bae29fc6ba
commit e66de575a1
6 changed files with 169 additions and 34 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);