Commit b60e31bf authored by Sanjay R Mehta's avatar Sanjay R Mehta Committed by Mika Westerberg
Browse files

thunderbolt: Add DP OUT resource when DP tunnel is discovered 



If the boot firmware implements a connection manager of its own it may
create a DisplayPort tunnel and will be handed off to Linux connection
manager, but the DP OUT resource is not saved in the dp_resource list.

This patch adds tunnelled DP OUT port to the dp_resource list once the
DP tunnel is discovered.

Signed-off-by: default avatarSanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: default avatarBasavaraj Natikar <Basavaraj.Natikar@amd.com>
Tested-by: default avatarRenjith Pananchikkal <Renjith.Pananchikkal@amd.com>
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
parent 568035b0

drivers/thunderbolt/tb.c

+28 −0
Original line number Diff line number Diff line
@@ -105,6 +105,32 @@ static void tb_remove_dp_resources(struct tb_switch *sw) 
	}

}



static void tb_discover_dp_resource(struct tb *tb, struct tb_port *port)

{

	struct tb_cm *tcm = tb_priv(tb);

	struct tb_port *p;



	list_for_each_entry(p, &tcm->dp_resources, list) {

		if (p == port)

			return;

	}



	tb_port_dbg(port, "DP %s resource available discovered\n",

		    tb_port_is_dpin(port) ? "IN" : "OUT");

	list_add_tail(&port->list, &tcm->dp_resources);

}



static void tb_discover_dp_resources(struct tb *tb)

{

	struct tb_cm *tcm = tb_priv(tb);

	struct tb_tunnel *tunnel;



	list_for_each_entry(tunnel, &tcm->tunnel_list, list) {

		if (tb_tunnel_is_dp(tunnel))

			tb_discover_dp_resource(tb, tunnel->dst_port);

	}

}



static void tb_switch_discover_tunnels(struct tb_switch *sw,

				       struct list_head *list,

				       bool alloc_hopids)
@@ -1446,6 +1472,8 @@ static int tb_start(struct tb *tb) 
	tb_scan_switch(tb->root_switch);

	/* Find out tunnels created by the boot firmware */

	tb_discover_tunnels(tb);

	/* Add DP resources from the DP tunnels created by the boot firmware */

	tb_discover_dp_resources(tb);

	/*

	 * If the boot firmware did not create USB 3.x tunnels create them

	 * now for the whole topology.