diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 627cbd880224..d252f68e5d09 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1272,7 +1272,7 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
 
 	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 	intel_fixed_panel_mode(fixed_mode, adjusted_mode);
-	intel_pch_panel_fitting(pipe_config, conn_state->scaling_mode);
+	intel_pch_panel_fitting(pipe_config, conn_state);
 
 	adjusted_mode->flags = 0;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index dcd6b96de9ac..8ca35ba91731 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2238,9 +2238,10 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 
 static int
 intel_dp_ycbcr420_config(struct intel_dp *intel_dp,
-			 struct drm_connector *connector,
-			 struct intel_crtc_state *crtc_state)
+			 struct intel_crtc_state *crtc_state,
+			 const struct drm_connector_state *conn_state)
 {
+	struct drm_connector *connector = conn_state->connector;
 	const struct drm_display_info *info = &connector->display_info;
 	const struct drm_display_mode *adjusted_mode =
 		&crtc_state->base.adjusted_mode;
@@ -2252,7 +2253,7 @@ intel_dp_ycbcr420_config(struct intel_dp *intel_dp,
 
 	crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420;
 
-	intel_pch_panel_fitting(crtc_state, DRM_MODE_SCALE_FULLSCREEN);
+	intel_pch_panel_fitting(crtc_state, conn_state);
 
 	return 0;
 }
@@ -2315,8 +2316,8 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 	if (lspcon->active)
 		lspcon_ycbcr420_config(&intel_connector->base, pipe_config);
 	else
-		ret = intel_dp_ycbcr420_config(intel_dp, &intel_connector->base,
-					       pipe_config);
+		ret = intel_dp_ycbcr420_config(intel_dp, pipe_config,
+					       conn_state);
 	if (ret)
 		return ret;
 
@@ -2333,11 +2334,9 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 				       adjusted_mode);
 
 		if (HAS_GMCH(dev_priv))
-			intel_gmch_panel_fitting(pipe_config,
-						 conn_state->scaling_mode);
+			intel_gmch_panel_fitting(pipe_config, conn_state);
 		else
-			intel_pch_panel_fitting(pipe_config,
-						conn_state->scaling_mode);
+			intel_pch_panel_fitting(pipe_config, conn_state);
 	}
 
 	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 0a7dc78db307..426dec979992 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2278,17 +2278,19 @@ static bool hdmi_deep_color_possible(const struct intel_crtc_state *crtc_state,
 }
 
 static bool
-intel_hdmi_ycbcr420_config(struct drm_connector *connector,
-			   struct intel_crtc_state *config)
+intel_hdmi_ycbcr420_config(struct intel_crtc_state *crtc_state,
+			   const struct drm_connector_state *conn_state)
 {
+	struct drm_connector *connector = conn_state->connector;
+
 	if (!connector->ycbcr_420_allowed) {
 		DRM_ERROR("Platform doesn't support YCBCR420 output\n");
 		return false;
 	}
 
-	config->output_format = INTEL_OUTPUT_FORMAT_YCBCR420;
+	crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420;
 
-	intel_pch_panel_fitting(config, DRM_MODE_SCALE_FULLSCREEN);
+	intel_pch_panel_fitting(crtc_state, conn_state);
 
 	return true;
 }
@@ -2418,7 +2420,7 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
 		pipe_config->pixel_multiplier = 2;
 
 	if (drm_mode_is_420_only(&connector->display_info, adjusted_mode)) {
-		if (!intel_hdmi_ycbcr420_config(connector, pipe_config)) {
+		if (!intel_hdmi_ycbcr420_config(pipe_config, conn_state)) {
 			DRM_ERROR("Can't support YCBCR420 output\n");
 			return -EINVAL;
 		}
diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c
index 09493505940b..03e8da7797dc 100644
--- a/drivers/gpu/drm/i915/display/intel_lvds.c
+++ b/drivers/gpu/drm/i915/display/intel_lvds.c
@@ -430,12 +430,9 @@ static int intel_lvds_compute_config(struct intel_encoder *intel_encoder,
 	if (HAS_PCH_SPLIT(dev_priv)) {
 		pipe_config->has_pch_encoder = true;
 
-		intel_pch_panel_fitting(pipe_config,
-					conn_state->scaling_mode);
+		intel_pch_panel_fitting(pipe_config, conn_state);
 	} else {
-		intel_gmch_panel_fitting(pipe_config,
-					 conn_state->scaling_mode);
-
+		intel_gmch_panel_fitting(pipe_config, conn_state);
 	}
 
 	/*
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 35125aa97a9f..2981d1751877 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -175,7 +175,7 @@ intel_panel_vbt_fixed_mode(struct intel_connector *connector)
 /* adjusted_mode has been preset to be the panel's fixed mode */
 void
 intel_pch_panel_fitting(struct intel_crtc_state *crtc_state,
-			int fitting_mode)
+			const struct drm_connector_state *conn_state)
 {
 	const struct drm_display_mode *adjusted_mode =
 		&crtc_state->base.adjusted_mode;
@@ -187,7 +187,7 @@ intel_pch_panel_fitting(struct intel_crtc_state *crtc_state,
 	    crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420)
 		return;
 
-	switch (fitting_mode) {
+	switch (conn_state->scaling_mode) {
 	case DRM_MODE_SCALE_CENTER:
 		width = crtc_state->pipe_src_w;
 		height = crtc_state->pipe_src_h;
@@ -224,6 +224,10 @@ intel_pch_panel_fitting(struct intel_crtc_state *crtc_state,
 		}
 		break;
 
+	case DRM_MODE_SCALE_NONE:
+		WARN_ON(adjusted_mode->crtc_hdisplay != crtc_state->pipe_src_w);
+		WARN_ON(adjusted_mode->crtc_vdisplay != crtc_state->pipe_src_h);
+		/* fall through */
 	case DRM_MODE_SCALE_FULLSCREEN:
 		x = y = 0;
 		width = adjusted_mode->crtc_hdisplay;
@@ -231,7 +235,7 @@ intel_pch_panel_fitting(struct intel_crtc_state *crtc_state,
 		break;
 
 	default:
-		MISSING_CASE(fitting_mode);
+		MISSING_CASE(conn_state->scaling_mode);
 		return;
 	}
 
@@ -374,7 +378,7 @@ static void i9xx_scale_aspect(struct intel_crtc_state *crtc_state,
 }
 
 void intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state,
-			      int fitting_mode)
+			      const struct drm_connector_state *conn_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -386,7 +390,7 @@ void intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state,
 	    adjusted_mode->crtc_vdisplay == crtc_state->pipe_src_h)
 		goto out;
 
-	switch (fitting_mode) {
+	switch (conn_state->scaling_mode) {
 	case DRM_MODE_SCALE_CENTER:
 		/*
 		 * For centered modes, we have to calculate border widths &
@@ -422,7 +426,7 @@ void intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state,
 		}
 		break;
 	default:
-		WARN(1, "bad panel fit mode: %d\n", fitting_mode);
+		MISSING_CASE(conn_state->scaling_mode);
 		return;
 	}
 
diff --git a/drivers/gpu/drm/i915/display/intel_panel.h b/drivers/gpu/drm/i915/display/intel_panel.h
index e1804e6e8325..e2fa1543a61f 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.h
+++ b/drivers/gpu/drm/i915/display/intel_panel.h
@@ -26,9 +26,9 @@ void intel_panel_fini(struct intel_panel *panel);
 void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
 			    struct drm_display_mode *adjusted_mode);
 void intel_pch_panel_fitting(struct intel_crtc_state *crtc_state,
-			     int fitting_mode);
+			     const struct drm_connector_state *conn_state);
 void intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state,
-			      int fitting_mode);
+			      const struct drm_connector_state *conn_state);
 void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state,
 				    u32 level, u32 max);
 int intel_panel_setup_backlight(struct drm_connector *connector,
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c
index 6a20c4169a53..9f4f7c670cc8 100644
--- a/drivers/gpu/drm/i915/display/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/display/vlv_dsi.c
@@ -272,11 +272,9 @@ static int intel_dsi_compute_config(struct intel_encoder *encoder,
 		intel_fixed_panel_mode(fixed_mode, adjusted_mode);
 
 		if (HAS_GMCH(dev_priv))
-			intel_gmch_panel_fitting(pipe_config,
-						 conn_state->scaling_mode);
+			intel_gmch_panel_fitting(pipe_config, conn_state);
 		else
-			intel_pch_panel_fitting(pipe_config,
-						conn_state->scaling_mode);
+			intel_pch_panel_fitting(pipe_config, conn_state);
 	}
 
 	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
