From 1d77f896dfd994123dcadb3396ab73be377240b7 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Tue, 24 Oct 2023 18:52:38 +0200
Subject: [PATCH] backends/drm: use libdrm function for checking if a device is
 kms capable

---
 src/backends/drm/drm_backend.cpp | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/backends/drm/drm_backend.cpp b/src/backends/drm/drm_backend.cpp
index e3c8c81733..d502ae48c8 100644
--- a/src/backends/drm/drm_backend.cpp
+++ b/src/backends/drm/drm_backend.cpp
@@ -185,14 +185,11 @@ DrmGpu *DrmBackend::addGpu(const QString &fileName)
         return nullptr;
     }
 
-    // try to make a simple drm get resource call, if it fails it is not useful for us
-    drmModeRes *resources = drmModeGetResources(fd);
-    if (!resources) {
+    if (!drmIsKMS(fd)) {
         qCDebug(KWIN_DRM) << "Skipping KMS incapable drm device node at" << fileName;
         m_session->closeRestricted(fd);
         return nullptr;
     }
-    drmModeFreeResources(resources);
 
     struct stat buf;
     if (fstat(fd, &buf) == -1) {