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 <[email protected]> Signed-off-by: Imre Deak <[email protected]> --- .../drm/i915/display/intel_dp_link_training.c | 44 +++++++++++++++++++ 1 file changed, 44 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 8a2ebee7a842f..184206067fa61 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -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); } -- 2.43.3
