diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 5c6058c..921926f 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -726,6 +726,10 @@
 	a.full = rfixed_const(100);
 	rdev->pm.sclk.full = rfixed_const(rdev->clock.default_sclk);
 	rdev->pm.sclk.full = rfixed_div(rdev->pm.sclk, a);
+
+	if (rdev->flags & RADEON_IS_IGP)
+		rdev->mc.igp_sideport_enabled = radeon_atombios_sideport_present(rdev);
+
 	return 0;
 }