1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 23126023aeba..5e5a72fca5fb 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -111,6 +111,13 @@ static void intel_lvds_get_config(struct intel_encoder *encoder,
 
         pipe_config->adjusted_mode.flags |= flags;
 
+        /* gen2/3 store dither state in pfit control, needs to match */
+        if (INTEL_INFO(dev)->gen < 4) {
+                tmp = I915_READ(PFIT_CONTROL);
+
+                pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE;
+        }
+
         dotclock = pipe_config->port_clock;
 
         if (HAS_PCH_SPLIT(dev_priv->dev))