1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 6dd622d733b9..e4fba39631a5 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -790,7 +790,12 @@ init_vbt_defaults(struct drm_i915_private *dev_priv)
 
         /* Default to using SSC */
         dev_priv->vbt.lvds_use_ssc = 1;
-        dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev, 1);
+        /*
+         * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
+         * clock for LVDS.
+         */
+        dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
+                        !HAS_PCH_SPLIT(dev));
         DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->vbt.lvds_ssc_freq);
 
         for (port = PORT_A; port < I915_MAX_PORTS; port++) {