Commit 0ec7d06b authored by David Francis's avatar David Francis Committed by Alex Deucher
Browse files

drm/amd/display: MST topology debugfs 



DRM provides drm_dp_mst_dump_topology, which prints
useful information about MST devices

Hook this up to a debugfs file named amdgpu_mst_topology

Signed-off-by: default avatarDavid Francis <David.Francis@amd.com>
Acked-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 78d9b95e

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

+24 −0
Original line number Diff line number Diff line
@@ -1053,9 +1053,33 @@ static int target_backlight_read(struct seq_file *m, void *data) 
	return 0;

}



static int mst_topo(struct seq_file *m, void *unused)

{

	struct drm_info_node *node = (struct drm_info_node *)m->private;

	struct drm_device *dev = node->minor->dev;

	struct drm_connector *connector;

	struct drm_connector_list_iter conn_iter;

	struct amdgpu_dm_connector *aconnector;



	drm_connector_list_iter_begin(dev, &conn_iter);

	drm_for_each_connector_iter(connector, &conn_iter) {

		if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)

			continue;



		aconnector = to_amdgpu_dm_connector(connector);



		seq_printf(m, "\nMST topology for connector %d\n", aconnector->connector_id);

		drm_dp_mst_dump_topology(m, &aconnector->mst_mgr);

	}

	drm_connector_list_iter_end(&conn_iter);



	return 0;

}



static const struct drm_info_list amdgpu_dm_debugfs_list[] = {

	{"amdgpu_current_backlight_pwm", &current_backlight_read},

	{"amdgpu_target_backlight_pwm", &target_backlight_read},

	{"amdgpu_mst_topology", &mst_topo},

};



/*

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