3 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index a6c654e17955..70ae3d57316b 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4383,6 +4383,17 @@ intel_dp_needs_link_retrain(struct intel_dp *intel_dp)
 	if (!intel_dp->link_trained)
 		return false;
 
+	/*
+	 * While PSR source HW is enabled, it will control main-link sending
+	 * frames, enabling and disabling it so trying to do a retrain will fail
+	 * as the link would or not be on or it could mix training patterns
+	 * and frame data at the same time causing retrain to fail.
+	 * Also when exiting PSR, HW will retrain the link anyways fixing
+	 * any link status error.
+	 */
+	if (intel_psr_enabled(intel_dp))
+		return false;
+
 	if (!intel_dp_get_link_status(intel_dp, link_status))
 		return false;
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a7d9ac912125..a62d77b76291 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -2047,6 +2047,7 @@ void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir);
 void intel_psr_short_pulse(struct intel_dp *intel_dp);
 int intel_psr_wait_for_idle(const struct intel_crtc_state *new_crtc_state,
 			    u32 *out_value);
+bool intel_psr_enabled(struct intel_dp *intel_dp);
 
 /* intel_quirks.c */
 void intel_init_quirks(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 54fa17a5596a..ebb255f230b7 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -1147,3 +1147,18 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
 exit:
 	mutex_unlock(&psr->lock);
 }
+
+bool intel_psr_enabled(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	bool ret;
+
+	if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp))
+		return false;
+
+	mutex_lock(&dev_priv->psr.lock);
+	ret = (dev_priv->psr.dp == intel_dp && dev_priv->psr.enabled);
+	mutex_unlock(&dev_priv->psr.lock);
+
+	return ret;
+}