Commit d6bbb6e5 authored by Imre Deak's avatar Imre Deak
Browse files

drm/i915/dp: Add debugfs entry to get the link retrain disabled state 



Add a connector debugfs entry showing if link retraining is disabled.

Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610164933.2947366-22-imre.deak@intel.com
parent 09f08c6c

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

+22 −0
Original line number Diff line number Diff line
@@ -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);

}