drm/i915/bxt: add bxt_find_best_dpll

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 1cad3dd..d7436cb 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1126,6 +1126,8 @@
 void
 ironlake_check_encoder_dotclock(const struct intel_crtc_state *pipe_config,
 				int dotclock);
+bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state, int target_clock,
+			intel_clock_t *best_clock);
 bool intel_crtc_active(struct drm_crtc *crtc);
 void hsw_enable_ips(struct intel_crtc *crtc);
 void hsw_disable_ips(struct intel_crtc *crtc);