4 files changed, 38 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 59e41b505191..277b40b13948 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5790,6 +5790,28 @@ intel_dp_detect_sdp_caps(struct intel_dp *intel_dp)
 		drm_dp_as_sdp_supported(&intel_dp->aux, intel_dp->dpcd);
 }
 
+static bool intel_dp_needs_dpcd_probe(struct intel_dp *intel_dp, bool force_on_external)
+{
+	struct intel_connector *connector = intel_dp->attached_connector;
+
+	if (intel_dp_is_edp(intel_dp))
+		return false;
+
+	if (force_on_external)
+		return true;
+
+	if (intel_dp->is_mst)
+		return false;
+
+	return drm_edid_has_quirk(&connector->base, DRM_EDID_QUIRK_DP_DPCD_PROBE);
+}
+
+void intel_dp_dpcd_set_probe(struct intel_dp *intel_dp, bool force_on_external)
+{
+	drm_dp_dpcd_set_probe(&intel_dp->aux,
+			      intel_dp_needs_dpcd_probe(intel_dp, force_on_external));
+}
+
 static int
 intel_dp_detect(struct drm_connector *_connector,
 		struct drm_modeset_acquire_ctx *ctx,
@@ -5918,6 +5940,8 @@ out_unset_edid:
 	if (status != connector_status_connected && !intel_dp->is_mst)
 		intel_dp_unset_edid(intel_dp);
 
+	intel_dp_dpcd_set_probe(intel_dp, false);
+
 	if (!intel_dp_is_edp(intel_dp))
 		drm_dp_set_subconnector_property(&connector->base,
 						 status,
@@ -5948,6 +5972,8 @@ intel_dp_force(struct drm_connector *_connector)
 		return;
 
 	intel_dp_set_edid(intel_dp);
+
+	intel_dp_dpcd_set_probe(intel_dp, false);
 }
 
 static int intel_dp_get_modes(struct drm_connector *_connector)
@@ -6320,10 +6346,11 @@ intel_dp_hpd_pulse(struct intel_digital_port *dig_port, bool long_hpd)
 	 * complete the DP tunnel BW request for the latter connector/encoder
 	 * waiting for this encoder's DPRX read, perform a dummy read here.
 	 */
-	if (long_hpd)
+	if (long_hpd) {
+		intel_dp_dpcd_set_probe(intel_dp, true);
+
 		intel_dp_read_dprx_caps(intel_dp, dpcd);
 
-	if (long_hpd) {
 		intel_dp->reset_link_params = true;
 		intel_dp_invalidate_source_oui(intel_dp);
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index eff3414c05db..0657f5681196 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -213,5 +213,6 @@ int intel_dp_compute_min_hblank(struct intel_crtc_state *crtc_state,
 				const struct drm_connector_state *conn_state);
 
 int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector);
+void intel_dp_dpcd_set_probe(struct intel_dp *intel_dp, bool force_on_external);
 
 #endif /* __INTEL_DP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c
index 411cf4474776..829a7c0fbe4f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
@@ -834,6 +834,8 @@ void intel_dp_aux_init(struct intel_dp *intel_dp)
 
 	intel_dp->aux.transfer = intel_dp_aux_transfer;
 	cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE);
+
+	intel_dp_dpcd_set_probe(intel_dp, true);
 }
 
 static enum aux_ch default_aux_ch(struct intel_encoder *encoder)
diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
index 74fe398663d6..901fda434af1 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -33,6 +33,7 @@
 #include "intel_display_core.h"
 #include "intel_display_rpm.h"
 #include "intel_display_types.h"
+#include "intel_dp.h"
 #include "intel_hdcp.h"
 #include "intel_hotplug.h"
 #include "intel_hotplug_irq.h"
@@ -906,9 +907,14 @@ void intel_hpd_poll_enable(struct intel_display *display)
  */
 void intel_hpd_poll_disable(struct intel_display *display)
 {
+	struct intel_encoder *encoder;
+
 	if (!HAS_DISPLAY(display))
 		return;
 
+	for_each_intel_dp(display->drm, encoder)
+		intel_dp_dpcd_set_probe(enc_to_intel_dp(encoder), true);
+
 	WRITE_ONCE(display->hotplug.poll_enabled, false);
 
 	spin_lock_irq(&display->irq.lock);