From ecc04e8ba7469fb01c5a066bf1c48d5cd58d1a18 Mon Sep 17 00:00:00 2001
From: mavonarx <75391689+mavonarx@users.noreply.github.com>
Date: Wed, 23 Jul 2025 23:11:07 +0200
Subject: 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>
---
 src/Compositor.hpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/Compositor.hpp')

diff --git a/src/Compositor.hpp b/src/Compositor.hpp
index b4a0c51c..23d1c365 100644
--- a/src/Compositor.hpp
+++ b/src/Compositor.hpp
@@ -152,6 +152,7 @@ class CCompositor {
     NColorManagement::SImageDescription getPreferredImageDescription();
     bool                                shouldChangePreferredImageDescription();
 
+    bool                                supportsDrmSyncobjTimeline() const;
     std::string                         m_explicitConfigPath;
 
   private:
@@ -165,6 +166,8 @@ class CCompositor {
     void             removeLockFile();
     void             setMallocThreshold();
 
+    bool             m_bDrmSyncobjTimelineSupported = false;
+
     uint64_t         m_hyprlandPID    = 0;
     wl_event_source* m_critSigSource  = nullptr;
     rlimit           m_originalNofile = {};
-- 
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