diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 6d2a5457c2c8..dd23dcfbde17 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -700,6 +700,16 @@ int radeon_asic_init(struct radeon_device *rdev)
 		rdev->asic->set_memory_clock = NULL;
 	}
 
+	/* set the number of crtcs */
+	if (rdev->flags & RADEON_SINGLE_CRTC)
+		rdev->num_crtc = 1;
+	else {
+		if (ASIC_IS_DCE4(rdev))
+			rdev->num_crtc = 6;
+		else
+			rdev->num_crtc = 2;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index ff5f09953c0a..d65931d2e77a 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1003,15 +1003,6 @@ int radeon_modeset_init(struct radeon_device *rdev)
 		radeon_combios_check_hardcoded_edid(rdev);
 	}
 
-	if (rdev->flags & RADEON_SINGLE_CRTC)
-		rdev->num_crtc = 1;
-	else {
-		if (ASIC_IS_DCE4(rdev))
-			rdev->num_crtc = 6;
-		else
-			rdev->num_crtc = 2;
-	}
-
 	/* allocate crtcs */
 	for (i = 0; i < rdev->num_crtc; i++) {
 		radeon_crtc_init(rdev->ddev, i);
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index 3cfd60fd0083..68519b406ca6 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -67,9 +67,10 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
 
 	/* Disable *all* interrupts */
 	rdev->irq.sw_int = false;
-	for (i = 0; i < 2; i++) {
+	for (i = 0; i < rdev->num_crtc; i++)
 		rdev->irq.crtc_vblank_int[i] = false;
-	}
+	for (i = 0; i < 6; i++)
+		rdev->irq.hpd[i] = false;
 	radeon_irq_set(rdev);
 	/* Clear bits */
 	radeon_irq_process(rdev);
@@ -95,22 +96,19 @@ void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
 	}
 	/* Disable *all* interrupts */
 	rdev->irq.sw_int = false;
-	for (i = 0; i < 2; i++) {
+	for (i = 0; i < rdev->num_crtc; i++)
 		rdev->irq.crtc_vblank_int[i] = false;
+	for (i = 0; i < 6; i++)
 		rdev->irq.hpd[i] = false;
-	}
 	radeon_irq_set(rdev);
 }
 
 int radeon_irq_kms_init(struct radeon_device *rdev)
 {
 	int r = 0;
-	int num_crtc = 2;
 
-	if (rdev->flags & RADEON_SINGLE_CRTC)
-		num_crtc = 1;
 	spin_lock_init(&rdev->irq.sw_lock);
-	r = drm_vblank_init(rdev->ddev, num_crtc);
+	r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
 	if (r) {
 		return r;
 	}