From a0a98d0b3171a4db956af5fbf256e66671c71866 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Thu, 9 Sep 2021 11:31:01 +0200
Subject: [PATCH] platforms/drm: only delete outputs if not pre-existing

When there aren't enough CRTCs to drive all the outputs this could
delete existing outputs.
---
 src/plugins/platforms/drm/drm_gpu.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/plugins/platforms/drm/drm_gpu.cpp b/src/plugins/platforms/drm/drm_gpu.cpp
index e2a8b82224..946664047d 100644
--- a/src/plugins/platforms/drm/drm_gpu.cpp
+++ b/src/plugins/platforms/drm/drm_gpu.cpp
@@ -340,8 +340,10 @@ bool DrmGpu::commitCombination(const QVector<DrmPipeline *> &pipelines)
         return true;
     } else {
         for (const auto &pipeline : qAsConst(pipelines)) {
-            Q_EMIT outputDisabled(pipeline->output());
-            delete pipeline->output();
+            if (!m_outputs.contains(pipeline->output())) {
+                Q_EMIT outputDisabled(pipeline->output());
+                delete pipeline->output();
+            }
         }
         return false;
     }