Commit fe089d5b authored by Imre Deak's avatar Imre Deak
Browse files

drm/i915/dp: Add debugfs entries to get the max link rate/lane count 



Add connector debugfs entries to get the maximum link rate and lane
count.

v2: Lock connection_mutex only for the required intel_dp state. (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
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/20240610164933.2947366-19-imre.deak@intel.com
parent c3c90de3

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

+44 −0
Original line number Diff line number Diff line
@@ -1770,6 +1770,44 @@ static ssize_t i915_dp_force_lane_count_write(struct file *file, 
}

DEFINE_SHOW_STORE_ATTRIBUTE(i915_dp_force_lane_count);



static int i915_dp_max_link_rate_show(void *data, u64 *val)

{

	struct intel_connector *connector = to_intel_connector(data);

	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;



	*val = intel_dp->link.max_rate;



	drm_modeset_unlock(&i915->drm.mode_config.connection_mutex);



	return 0;

}

DEFINE_DEBUGFS_ATTRIBUTE(i915_dp_max_link_rate_fops, i915_dp_max_link_rate_show, NULL, "%llu\n");



static int i915_dp_max_lane_count_show(void *data, u64 *val)

{

	struct intel_connector *connector = to_intel_connector(data);

	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;



	*val = intel_dp->link.max_lane_count;



	drm_modeset_unlock(&i915->drm.mode_config.connection_mutex);



	return 0;

}

DEFINE_DEBUGFS_ATTRIBUTE(i915_dp_max_lane_count_fops, i915_dp_max_lane_count_show, NULL, "%llu\n");



void intel_dp_link_training_debugfs_add(struct intel_connector *connector)

{

	struct dentry *root = connector->base.debugfs_entry;
@@ -1783,4 +1821,10 @@ void intel_dp_link_training_debugfs_add(struct intel_connector *connector) 


	debugfs_create_file("i915_dp_force_lane_count", 0644, root,

			    connector, &i915_dp_force_lane_count_fops);



	debugfs_create_file("i915_dp_max_link_rate", 0444, root,

			    connector, &i915_dp_max_link_rate_fops);



	debugfs_create_file("i915_dp_max_lane_count", 0444, root,

			    connector, &i915_dp_max_lane_count_fops);

}