diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 5c30d4488141..333624fcebd7 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1261,17 +1261,33 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector,
 	return MODE_OK;
 }
 
-bool intel_dp_need_joiner(struct intel_dp *intel_dp,
-			  struct intel_connector *connector,
-			  int hdisplay, int clock)
+static
+bool intel_dp_needs_bigjoiner(struct intel_dp *intel_dp,
+			      struct intel_connector *connector,
+			      int hdisplay, int clock)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 
-	if (!intel_dp_has_joiner(intel_dp))
-		return false;
+	return clock > i915->display.cdclk.max_dotclk_freq || hdisplay > 5120;
+}
 
-	return clock > i915->display.cdclk.max_dotclk_freq || hdisplay > 5120 ||
-	       connector->force_joined_pipes == 2;
+int intel_dp_compute_joiner_pipes(struct intel_dp *intel_dp,
+				  struct intel_connector *connector,
+				  int hdisplay, int clock)
+{
+	switch (connector->force_joined_pipes) {
+	case 2:
+		return connector->force_joined_pipes;
+	default:
+		MISSING_CASE(connector->force_joined_pipes);
+		fallthrough;
+	case 0:
+		if (intel_dp_has_joiner(intel_dp) &&
+		    intel_dp_needs_bigjoiner(intel_dp, connector, hdisplay, clock))
+			return 2;
+	}
+
+	return 0;
 }
 
 bool intel_dp_has_dsc(const struct intel_connector *connector)
@@ -1309,6 +1325,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 	u8 dsc_slice_count = 0;
 	enum drm_mode_status status;
 	bool dsc = false, joiner = false;
+	int num_joined_pipes;
 
 	status = intel_cpu_transcoder_mode_valid(dev_priv, mode);
 	if (status != MODE_OK)
@@ -1329,11 +1346,14 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 		target_clock = fixed_mode->clock;
 	}
 
-	if (intel_dp_need_joiner(intel_dp, connector,
-				 mode->hdisplay, target_clock)) {
+	num_joined_pipes = intel_dp_compute_joiner_pipes(intel_dp, connector,
+							 mode->hdisplay, target_clock);
+
+	if (num_joined_pipes == 2) {
 		joiner = true;
 		max_dotclk *= 2;
 	}
+
 	if (target_clock > max_dotclk)
 		return MODE_CLOCK_HIGH;
 
@@ -2523,15 +2543,17 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 	struct link_config_limits limits;
 	bool dsc_needed, joiner_needs_dsc;
+	int num_joined_pipes;
 	int ret = 0;
 
 	if (pipe_config->fec_enable &&
 	    !intel_dp_supports_fec(intel_dp, connector, pipe_config))
 		return -EINVAL;
 
-	if (intel_dp_need_joiner(intel_dp, connector,
-				 adjusted_mode->crtc_hdisplay,
-				 adjusted_mode->crtc_clock))
+	num_joined_pipes = intel_dp_compute_joiner_pipes(intel_dp, connector,
+							 adjusted_mode->crtc_hdisplay,
+							 adjusted_mode->crtc_clock);
+	if (num_joined_pipes == 2)
 		pipe_config->joiner_pipes = GENMASK(crtc->pipe + 1, crtc->pipe);
 
 	joiner_needs_dsc = intel_dp_joiner_needs_dsc(i915, pipe_config->joiner_pipes);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 1b9aaddd8c35..bc9a82d82df2 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -153,9 +153,9 @@ int intel_dp_dsc_sink_max_compressed_bpp(const struct intel_connector *connector
 u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
 				int mode_clock, int mode_hdisplay,
 				bool bigjoiner);
-bool intel_dp_need_joiner(struct intel_dp *intel_dp,
-			  struct intel_connector *connector,
-			  int hdisplay, int clock);
+int intel_dp_compute_joiner_pipes(struct intel_dp *intel_dp,
+				  struct intel_connector *connector,
+				  int hdisplay, int clock);
 
 static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 15541932b809..383b3e38df52 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -568,6 +568,7 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 		&pipe_config->hw.adjusted_mode;
 	struct link_config_limits limits;
 	bool dsc_needed, joiner_needs_dsc;
+	int num_joined_pipes;
 	int ret = 0;
 
 	if (pipe_config->fec_enable &&
@@ -577,9 +578,10 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return -EINVAL;
 
-	if (intel_dp_need_joiner(intel_dp, connector,
-				 adjusted_mode->crtc_hdisplay,
-				 adjusted_mode->crtc_clock))
+	num_joined_pipes = intel_dp_compute_joiner_pipes(intel_dp, connector,
+							 adjusted_mode->crtc_hdisplay,
+							 adjusted_mode->crtc_clock);
+	if (num_joined_pipes == 2)
 		pipe_config->joiner_pipes = GENMASK(crtc->pipe + 1, crtc->pipe);
 
 	pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
@@ -1426,6 +1428,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 	u16 dsc_max_compressed_bpp = 0;
 	u8 dsc_slice_count = 0;
 	int target_clock = mode->clock;
+	int num_joined_pipes;
 
 	if (drm_connector_is_unregistered(connector)) {
 		*status = MODE_ERROR;
@@ -1465,8 +1468,9 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 	 *   corresponding link capabilities of the sink) in case the
 	 *   stream is uncompressed for it by the last branch device.
 	 */
-	if (intel_dp_need_joiner(intel_dp, intel_connector,
-				 mode->hdisplay, target_clock)) {
+	num_joined_pipes = intel_dp_compute_joiner_pipes(intel_dp, intel_connector,
+							 mode->hdisplay, target_clock);
+	if (num_joined_pipes == 2) {
 		joiner = true;
 		max_dotclk *= 2;
 	}
