drm/i915/dp: Reorder intel_dp_compute_config() a bit

Consolidate the double pfit call, and reorder things so that
intel_dp_output_format() and intel_dp_compute_link_config() are
back-to-back. They are intimately related, and will need to be
called twice to properly handle the "4:2:0 also" modes.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220322120015.28074-6-ville.syrjala@linux.intel.comReviewed-by: Uma Shankar <uma.shankar@intel.com>

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

@@ -1883,15 +1883,6 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 	if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && encoder->port != PORT_A)
 		pipe_config->has_pch_encoder = true;
 
-	pipe_config->output_format = intel_dp_output_format(&intel_connector->base,
-							    adjusted_mode);
-
-	if (pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
-		ret = intel_panel_fitting(pipe_config, conn_state);
-		if (ret)
-			return ret;
-	}
-
 	pipe_config->has_audio = intel_dp_has_audio(encoder, pipe_config, conn_state);
 
 	fixed_mode = intel_panel_fixed_mode(intel_connector, adjusted_mode);
@@ -1899,10 +1890,6 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 		ret = intel_panel_compute_config(intel_connector, adjusted_mode);
 		if (ret)
 			return ret;
-
-		ret = intel_panel_fitting(pipe_config, conn_state);
-		if (ret)
-			return ret;
 	}
 
 	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
@@ -1918,10 +1905,20 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 	if (intel_dp_hdisplay_bad(dev_priv, adjusted_mode->crtc_hdisplay))
 		return -EINVAL;
 
+	pipe_config->output_format = intel_dp_output_format(&intel_connector->base,
+							    adjusted_mode);
+
 	ret = intel_dp_compute_link_config(encoder, pipe_config, conn_state);
 	if (ret < 0)
 		return ret;
 
+	if ((intel_dp_is_edp(intel_dp) && fixed_mode) ||
+	    pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
+		ret = intel_panel_fitting(pipe_config, conn_state);
+		if (ret)
+			return ret;
+	}
+
 	pipe_config->limited_color_range =
 		intel_dp_limited_color_range(pipe_config, conn_state);