diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c
index 3b8b84177085..6ce8c10fe975 100644
--- a/drivers/gpu/drm/i915/display/intel_gmbus.c
+++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
@@ -931,13 +931,6 @@ struct i2c_adapter *intel_gmbus_get_adapter(struct drm_i915_private *dev_priv,
 	return &dev_priv->gmbus[pin].adapter;
 }
 
-void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed)
-{
-	struct intel_gmbus *bus = to_intel_gmbus(adapter);
-
-	bus->reg0 = (bus->reg0 & ~(0x3 << 8)) | speed;
-}
-
 void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit)
 {
 	struct intel_gmbus *bus = to_intel_gmbus(adapter);
diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.h b/drivers/gpu/drm/i915/display/intel_gmbus.h
index b96212b85425..8edc2e99cf53 100644
--- a/drivers/gpu/drm/i915/display/intel_gmbus.h
+++ b/drivers/gpu/drm/i915/display/intel_gmbus.h
@@ -41,7 +41,6 @@ int intel_gmbus_output_aksv(struct i2c_adapter *adapter);
 
 struct i2c_adapter *
 intel_gmbus_get_adapter(struct drm_i915_private *dev_priv, unsigned int pin);
-void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed);
 void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
 bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter);
 void intel_gmbus_reset(struct drm_i915_private *dev_priv);