platforms/drm: Remove unused parameter in DrmCrtc constructor

src/plugins/platforms/drm/drm_gpu.cpp

@@ -171,7 +171,7 @@ bool DrmGpu::updateOutputs()
         const uint32_t currentCrtc = resources->crtcs[i];
         auto it = std::find_if(m_crtcs.constBegin(), m_crtcs.constEnd(), [currentCrtc] (DrmCrtc *c) { return c->id() == currentCrtc; });
         if (it == m_crtcs.constEnd()) {
-            auto c = new DrmCrtc(this, currentCrtc, m_backend, i);
+            auto c = new DrmCrtc(this, currentCrtc, i);
             if (!c->init()) {
                 delete c;
                 continue;

src/plugins/platforms/drm/drm_object_crtc.cpp

@@ -17,11 +17,10 @@
 namespace KWin
 {
 
-DrmCrtc::DrmCrtc(DrmGpu *gpu, uint32_t crtcId, DrmBackend *backend, int resIndex)
-    : DrmObject(gpu, crtc_id)
+DrmCrtc::DrmCrtc(DrmGpu *gpu, uint32_t crtcId, int resIndex)
+    : DrmObject(gpu, crtcId)
     , m_crtc(drmModeGetCrtc(gpu->fd(), crtcId))
     , m_resIndex(resIndex)
-    , m_backend(backend)
 {
 }
 

src/plugins/platforms/drm/drm_object_crtc.h

@@ -25,7 +25,7 @@ class DrmGpu;
 class DrmCrtc : public DrmObject
 {
 public:
-    DrmCrtc(DrmGpu *gpu, uint32_t crtcId, DrmBackend *backend, int resIndex);
+    DrmCrtc(DrmGpu *gpu, uint32_t crtcId, int resIndex);
 
     bool init() override;
 
@@ -64,7 +64,6 @@ private:
     QSharedPointer<DrmBuffer> m_currentBuffer;
     QSharedPointer<DrmBuffer> m_nextBuffer;
     DrmDumbBuffer *m_blackBuffer = nullptr;
-    DrmBackend *m_backend;
 };
 
 }