drm/i915: change intel_ddc_get_modes() function parameters

This one replaces original param for intel_ddc_get_modes() with
DRM connector and i2c bus adapter instead. With explicit params,
we won't require that a single driver structure must hold connector
and DDC bus reference, which ease the conversion to splitted encoder/
connector model.

It also clears up for some cases that we would steal other DDC bus
for mode probe, like VGA analog DDC probe for DVI-I. Also it fixed
a bug in old DVI-I probe handling, that failed to restore origin
analog GPIO port.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/intel_lvds.c

@@ -639,7 +639,7 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
 	int ret = 0;
 
 	if (dev_priv->lvds_edid_good) {
-		ret = intel_ddc_get_modes(intel_encoder);
+		ret = intel_ddc_get_modes(connector, intel_encoder->ddc_bus);
 
 		if (ret)
 			return ret;
@@ -1066,7 +1066,7 @@ void intel_lvds_init(struct drm_device *dev)
 	 */
 	dev_priv->lvds_edid_good = true;
 
-	if (!intel_ddc_get_modes(intel_encoder))
+	if (!intel_ddc_get_modes(connector, intel_encoder->ddc_bus))
 		dev_priv->lvds_edid_good = false;
 
 	list_for_each_entry(scan, &connector->probed_modes, head) {