drm/i915/dp: Use check link state work in the HPD IRQ handler

Simplify things by retraining a DP link if a bad link is detected in the
HPD IRQ handler from the encoder's check link state work, similarly to
how this is done after a modeset link training failure.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610164933.2947366-14-imre.deak@intel.com

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

@@ -4974,6 +4974,8 @@ static bool
 intel_dp_check_mst_status(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	struct intel_encoder *encoder = &dig_port->base;
 	bool link_ok = true;
 	bool reprobe_needed = false;
 
@@ -5019,7 +5021,10 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp)
 			drm_dp_mst_hpd_irq_send_new_request(&intel_dp->mst_mgr);
 	}
 
-	return link_ok && !reprobe_needed;
+	if (!link_ok)
+		intel_encoder_link_check_queue_work(encoder, 0);
+
+	return !reprobe_needed;
 }
 
 static void
@@ -5495,9 +5500,7 @@ intel_dp_short_pulse(struct intel_dp *intel_dp)
 	/* Handle CEC interrupts, if any */
 	drm_dp_cec_irq(&intel_dp->aux);
 
-	/* defer to the hotplug work for link retraining if needed */
-	if (intel_dp_needs_link_retrain(intel_dp))
-		return false;
+	intel_dp_check_link_state(intel_dp);
 
 	intel_psr_short_pulse(intel_dp);