drm/i915: Polish intel_get_lvds_encoder()

Pass dev_priv to intel_get_lvds_encoder() and polish the
implementation a bit.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190318202653.15217-2-ville.syrjala@linux.intel.comReviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/i915/intel_dp.c

@@ -7073,7 +7073,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	 * eDP and LVDS bail out early in this case to prevent interfering
 	 * with an already powered-on LVDS power sequencer.
 	 */
-	if (intel_get_lvds_encoder(&dev_priv->drm)) {
+	if (intel_get_lvds_encoder(dev_priv)) {
 		WARN_ON(!(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
 		DRM_INFO("LVDS was detected, not registering eDP\n");
 

drivers/gpu/drm/i915/intel_drv.h

@@ -2116,7 +2116,7 @@ void intel_read_infoframe(struct intel_encoder *encoder,
 bool intel_lvds_port_enabled(struct drm_i915_private *dev_priv,
 			     i915_reg_t lvds_reg, enum pipe *pipe);
 void intel_lvds_init(struct drm_i915_private *dev_priv);
-struct intel_encoder *intel_get_lvds_encoder(struct drm_device *dev);
+struct intel_encoder *intel_get_lvds_encoder(struct drm_i915_private *dev_priv);
 bool intel_is_dual_link_lvds(struct drm_device *dev);
 
 /* intel_overlay.c */

drivers/gpu/drm/i915/intel_lvds.c

@@ -742,20 +742,21 @@ static const struct dmi_system_id intel_dual_link_lvds[] = {
 	{ }	/* terminating entry */
 };
 
-struct intel_encoder *intel_get_lvds_encoder(struct drm_device *dev)
+struct intel_encoder *intel_get_lvds_encoder(struct drm_i915_private *dev_priv)
 {
-	struct intel_encoder *intel_encoder;
+	struct intel_encoder *encoder;
 
-	for_each_intel_encoder(dev, intel_encoder)
-		if (intel_encoder->type == INTEL_OUTPUT_LVDS)
-			return intel_encoder;
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		if (encoder->type == INTEL_OUTPUT_LVDS)
+			return encoder;
+	}
 
 	return NULL;
 }
 
 bool intel_is_dual_link_lvds(struct drm_device *dev)
 {
-	struct intel_encoder *encoder = intel_get_lvds_encoder(dev);
+	struct intel_encoder *encoder = intel_get_lvds_encoder(to_i915(dev));
 
 	return encoder && to_lvds_encoder(&encoder->base)->is_dual_link;
 }