From 78498c8987a8fddf2e8486f20c68ac2717a50f08 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Sat, 6 Jul 2024 18:11:31 +0200
Subject: [PATCH] dont crash on multigpu lol

---
 src/helpers/Monitor.cpp           | 4 ++--
 src/helpers/sync/SyncTimeline.cpp | 5 ++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/helpers/Monitor.cpp b/src/helpers/Monitor.cpp
index a43b6e2e5..b8e5a0d63 100644
--- a/src/helpers/Monitor.cpp
+++ b/src/helpers/Monitor.cpp
@@ -31,8 +31,8 @@ CMonitor::~CMonitor() {
 void CMonitor::onConnect(bool noRule) {
 
     if (output->supportsExplicit) {
-        inTimeline  = CSyncTimeline::create(g_pCompositor->m_iDRMFD);
-        outTimeline = CSyncTimeline::create(g_pCompositor->m_iDRMFD);
+        inTimeline  = CSyncTimeline::create(output->getBackend()->drmFD());
+        outTimeline = CSyncTimeline::create(output->getBackend()->drmFD());
     }
 
     listeners.frame      = output->events.frame.registerListener([this](std::any d) { Events::listener_monitorFrame(this, nullptr); });
diff --git a/src/helpers/sync/SyncTimeline.cpp b/src/helpers/sync/SyncTimeline.cpp
index 1a7286e00..d3c1b4161 100644
--- a/src/helpers/sync/SyncTimeline.cpp
+++ b/src/helpers/sync/SyncTimeline.cpp
@@ -176,7 +176,10 @@ bool CSyncTimeline::importFromSyncFileFD(uint64_t dst, int fd) {
 }
 
 bool CSyncTimeline::transfer(SP<CSyncTimeline> from, uint64_t fromPoint, uint64_t toPoint) {
-    ASSERT(from->drmFD == drmFD);
+    if (drmFD != from->drmFD) {
+        Debug::log(ERR, "CSyncTimeline::transfer: cannot transfer timelines between gpus");
+        return false;
+    }
 
     if (drmSyncobjTransfer(drmFD, handle, toPoint, from->handle, fromPoint, 0)) {
         Debug::log(ERR, "CSyncTimeline::transfer: drmSyncobjTransfer failed");