From 149801520a0a7954b860acc1043bf0b87f57065b Mon Sep 17 00:00:00 2001
From: kossLAN <kosslan@kosslan.dev>
Date: Mon, 6 Apr 2026 22:19:32 -0400
Subject: [PATCH] backend: fix bug that mistakeningly selected wrong render
 device

---
 src/backend.rs              | 3 +++
 src/backends/metal/video.rs | 4 ++++
 src/state.rs                | 3 +++
 3 files changed, 10 insertions(+)

diff --git a/src/backend.rs b/src/backend.rs
index af63d868..f30582ad 100644
--- a/src/backend.rs
+++ b/src/backend.rs
@@ -585,6 +585,9 @@ pub trait BackendDrmDevice {
     fn direct_scanout_enabled(&self) -> bool {
         false
     }
+    fn gfx_fast_ram_access(&self) -> bool {
+        false
+    }
     fn create_lease(
         self: Rc<Self>,
         lessee: Rc<dyn BackendDrmLessee>,
diff --git a/src/backends/metal/video.rs b/src/backends/metal/video.rs
index 64cc7c12..eea31b5b 100644
--- a/src/backends/metal/video.rs
+++ b/src/backends/metal/video.rs
@@ -189,6 +189,10 @@ impl BackendDrmDevice for MetalDrmDevice {
             .unwrap_or(self.backend.state.direct_scanout_enabled.get())
     }
 
+    fn gfx_fast_ram_access(&self) -> bool {
+        self.ctx.get().gfx.fast_ram_access()
+    }
+
     fn create_lease(
         self: Rc<Self>,
         lessee: Rc<dyn BackendDrmLessee>,
diff --git a/src/state.rs b/src/state.rs
index ea68b130..7bcac2b6 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -637,6 +637,9 @@ impl State {
                 {
                     continue;
                 }
+                if dev.dev.gfx_fast_ram_access() {
+                    continue;
+                }
                 dev.make_render_device();
                 if self.render_ctx.is_some() {
                     break;