drm: check syncobj timeline support before advertising protocol (#11117)

Prevents crashes on systems where DRM driver lacks syncobj timeline
support (e.g., Apple Silicon with Honeykrisp driver). Applications
like Zed and WezTerm would crash with 'Timeline failed importing'
when trying to use explicit sync.

Fixes #8158 #8803

---------

Co-authored-by: mvonarx <matthias.vonarx@sitrox.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/helpers/sync/SyncTimeline.cpp b/src/helpers/sync/SyncTimeline.cpp
index 1b089caa..614a7c5b 100644
--- a/src/helpers/sync/SyncTimeline.cpp
+++ b/src/helpers/sync/SyncTimeline.cpp
@@ -1,12 +1,16 @@
 #include "SyncTimeline.hpp"
 #include "../../defines.hpp"
 #include "../../managers/eventLoop/EventLoopManager.hpp"
+#include "../../Compositor.hpp"
 
 #include <xf86drm.h>
 #include <sys/eventfd.h>
 using namespace Hyprutils::OS;
 
 SP<CSyncTimeline> CSyncTimeline::create(int drmFD_) {
+    if (!g_pCompositor->supportsDrmSyncobjTimeline())
+        return nullptr;
+
     auto timeline     = SP<CSyncTimeline>(new CSyncTimeline);
     timeline->m_drmFD = drmFD_;
     timeline->m_self  = timeline;
@@ -20,6 +24,9 @@ SP<CSyncTimeline> CSyncTimeline::create(int drmFD_) {
 }
 
 SP<CSyncTimeline> CSyncTimeline::create(int drmFD_, CFileDescriptor&& drmSyncobjFD) {
+    if (!g_pCompositor->supportsDrmSyncobjTimeline())
+        return nullptr;
+
     auto timeline         = SP<CSyncTimeline>(new CSyncTimeline);
     timeline->m_drmFD     = drmFD_;
     timeline->m_syncobjFD = std::move(drmSyncobjFD);