drm: add AQ_MGPU_NO_EXPLICIT

hyprwm · Aug 5, 2024 · 8a8afd3 · 8a8afd3
1 parent 6f5adc0
commit 8a8afd3
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diff --git a/docs/env.md b/docs/env.md
@@ -5,6 +5,7 @@ Unless specified otherwise, a variable is enabled if and only if it's set to `1`
 ### DRM
 
 `AQ_NO_ATOMIC` -> Disables drm atomic modesetting
+`AQ_MGPU_NO_EXPLICIT` -> Disables explicit syncing on mgpu buffers
 
 ### Debugging
 

diff --git a/src/backend/drm/DRM.cpp b/src/backend/drm/DRM.cpp
@@ -1483,7 +1483,8 @@ bool Aquamarine::CDRMOutput::commitState(bool onlyTest) {
             }
 
             // replace the explicit in fence if the blitting backend returned one, otherwise discard old. Passed fence from the client is wrong.
-            if (blitResult.syncFD.has_value())
+            static auto NO_EXPLICIT = envEnabled("AQ_MGPU_NO_EXPLICIT");
+            if (blitResult.syncFD.has_value() && !NO_EXPLICIT)
                 state->setExplicitInFence(blitResult.syncFD.value());
             else
                 state->setExplicitInFence(-1);