drm/i915: Extract hsw_configure_cpu_transcoder()

Pull the transcoder specific modeset steps into a single place.
With bigoiner we need to keep in mind wheher we're dealing with
the transcoder or the pipe, and a slightly higher level split makes
that easier.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220124192638.26262-4-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_display.c

@@ -2011,6 +2011,27 @@ static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
 		intel_uncompressed_joiner_enable(crtc_state);
 }
 
+static void hsw_configure_cpu_transcoder(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	intel_set_transcoder_timings(crtc_state);
+
+	if (cpu_transcoder != TRANSCODER_EDP)
+		intel_de_write(dev_priv, PIPE_MULT(cpu_transcoder),
+			       crtc_state->pixel_multiplier - 1);
+
+	if (crtc_state->has_pch_encoder)
+		intel_cpu_transcoder_set_m_n(crtc_state,
+					     &crtc_state->fdi_m_n, NULL);
+
+	hsw_set_frame_start_delay(crtc_state);
+
+	hsw_set_transconf(crtc_state);
+}
+
 static void hsw_crtc_enable(struct intel_atomic_state *state,
 			    struct intel_crtc *crtc)
 {
@@ -2039,21 +2060,8 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
 	if (DISPLAY_VER(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
 		bdw_set_pipemisc(new_crtc_state);
 
-	if (!new_crtc_state->bigjoiner_slave && !transcoder_is_dsi(cpu_transcoder)) {
-		intel_set_transcoder_timings(new_crtc_state);
-
-		if (cpu_transcoder != TRANSCODER_EDP)
-			intel_de_write(dev_priv, PIPE_MULT(cpu_transcoder),
-				       new_crtc_state->pixel_multiplier - 1);
-
-		if (new_crtc_state->has_pch_encoder)
-			intel_cpu_transcoder_set_m_n(new_crtc_state,
-						     &new_crtc_state->fdi_m_n, NULL);
-
-		hsw_set_frame_start_delay(new_crtc_state);
-
-		hsw_set_transconf(new_crtc_state);
-	}
+	if (!new_crtc_state->bigjoiner_slave && !transcoder_is_dsi(cpu_transcoder))
+		hsw_configure_cpu_transcoder(new_crtc_state);
 
 	crtc->active = true;