1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index 1841145a7c4..8e0a8759e42 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -83,8 +83,12 @@ void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
 int radeon_irq_kms_init(struct radeon_device *rdev)
 {
         int r = 0;
+        int num_crtc = 2;
 
-        r = drm_vblank_init(rdev->ddev, 2);
+        if (rdev->flags & RADEON_SINGLE_CRTC)
+                num_crtc = 1;
+
+        r = drm_vblank_init(rdev->ddev, num_crtc);
         if (r) {
                 return r;
         }