drm/i915: expose intel_ddi_get_encoder_port()

In preparation for followup work.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_ddi.c

@@ -58,7 +58,7 @@ static const u32 hsw_ddi_translations_fdi[] = {
 	0x00FFFFFF, 0x00040006		/* HDMI parameters */
 };
 
-static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
+enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	int type = intel_encoder->type;

drivers/gpu/drm/i915/intel_drv.h

@@ -712,6 +712,7 @@ extern void intel_write_eld(struct drm_encoder *encoder,
 extern void intel_prepare_ddi(struct drm_device *dev);
 extern void hsw_fdi_link_train(struct drm_crtc *crtc);
 extern void intel_ddi_init(struct drm_device *dev, enum port port);
+extern enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder);
 
 /* For use by IVB LP watermark workaround in intel_sprite.c */
 extern void intel_update_watermarks(struct drm_device *dev);