drm/i915: Fix SSC frequence for IGDNG

commit 339e5a4c78041cd7b473ddf0a81eb06a131127bb upstream.

IGDNG LVDS SSC uses 120Mhz freq. This fixes one
1600x900 LVDS panel black issue on IGDNG with SSC enabled.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index f806fcc54e09d3ad5a6e262b92530d6900a8afb6..698a0edf0ea9b7b703b1dc8da7a8557783834113 100644 (file)
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -217,6 +217,9 @@ parse_general_features(struct drm_i915_private *dev_priv,
                        if (IS_I85X(dev_priv->dev))
                                dev_priv->lvds_ssc_freq =
                                        general->ssc_freq ? 66 : 48;
+                       else if (IS_IGDNG(dev_priv->dev))
+                               dev_priv->lvds_ssc_freq =
+                                       general->ssc_freq ? 100 : 120;
                        else
                                dev_priv->lvds_ssc_freq =
                                        general->ssc_freq ? 100 : 96;