Add a connector debugfs entry showing if link retraining is disabled.
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
.../drm/i915/display/intel_dp_link_training.c | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index 4da550d6e0ffc..1bc4ef84ff3bc 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -1898,6 +1898,25 @@ DEFINE_DEBUGFS_ATTRIBUTE(i915_dp_force_link_retrain_fops,
i915_dp_force_link_retrain_show,
i915_dp_force_link_retrain_write, "%llu\n");
+static int i915_dp_link_retrain_disabled_show(struct seq_file *m, void *data)
+{
+ struct intel_connector *connector = to_intel_connector(m->private);
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
+ struct intel_dp *intel_dp = intel_connector_to_intel_dp(connector);
+ int err;
+
+ err = drm_modeset_lock_single_interruptible(&i915->drm.mode_config.connection_mutex);
+ if (err)
+ return err;
+
+ seq_printf(m, "%s\n", str_yes_no(intel_dp->link.retrain_disabled));
+
+ drm_modeset_unlock(&i915->drm.mode_config.connection_mutex);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(i915_dp_link_retrain_disabled);
+
void intel_dp_link_training_debugfs_add(struct intel_connector *connector)
{
struct dentry *root = connector->base.debugfs_entry;
@@ -1923,4 +1942,7 @@ void intel_dp_link_training_debugfs_add(struct intel_connector *connector)
debugfs_create_file("i915_dp_force_link_retrain", 0644, root,
connector, &i915_dp_force_link_retrain_fops);
+
+ debugfs_create_file("i915_dp_link_retrain_disabled", 0444, root,
+ connector, &i915_dp_link_retrain_disabled_fops);
}
--
2.43.3
