[PATCH v3 13/21] drm/i915/dp: Use check link state work in the HPD IRQ handler

[Imre Deak]

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.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 6e9c85a94d27e..1f4798be58eb5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4959,6 +4959,8 @@ 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;
 
@@ -5004,7 +5006,10 @@ 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
@@ -5480,9 +5485,7 @@ 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);
 
-- 
2.43.3