From 6012e409a61cf4100455c2db664fe6e058a57165 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Sat, 26 Feb 2022 23:53:52 +0100
Subject: [PATCH] backends/drm: fix multi-gpu

The import code was added but not actually used
---
 src/backends/drm/egl_gbm_layer.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/backends/drm/egl_gbm_layer.cpp b/src/backends/drm/egl_gbm_layer.cpp
index aeee43f1ed..2325139067 100644
--- a/src/backends/drm/egl_gbm_layer.cpp
+++ b/src/backends/drm/egl_gbm_layer.cpp
@@ -140,7 +140,14 @@ bool EglGbmLayer::endRendering(const QRegion &damagedRegion)
         m_shadowBuffer->render(m_pipeline->pending.sourceTransformation);
     }
     GLRenderTarget::popRenderTarget();
-    const auto buffer = m_gbmSurface->swapBuffersForDrm(damagedRegion);
+    QSharedPointer<DrmBuffer> buffer;
+    if (m_pipeline->gpu() == m_eglBackend->gpu()) {
+        buffer = m_gbmSurface->swapBuffersForDrm(damagedRegion);
+    } else {
+        if (m_gbmSurface->swapBuffers(damagedRegion)) {
+            buffer = importBuffer();
+        }
+    }
     if (buffer) {
         m_currentBuffer = buffer;
         m_currentDamage = damagedRegion;