thunderbolt: Add debug logging of DisplayPort resource allocation

Add more debugging around DP resource allocation/de-allocation.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index e00f4b8..13f9230 100644 (file)
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -3056,9 +3056,20 @@ bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in)
  */
 int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
 {
+       int ret;
+
        if (tb_switch_is_usb4(sw))
-               return usb4_switch_alloc_dp_resource(sw, in);
-       return tb_lc_dp_sink_alloc(sw, in);
+               ret = usb4_switch_alloc_dp_resource(sw, in);
+       else
+               ret = tb_lc_dp_sink_alloc(sw, in);
+
+       if (ret)
+               tb_sw_warn(sw, "failed to allocate DP resource for port %d\n",
+                          in->port);
+       else
+               tb_sw_dbg(sw, "allocated DP resource for port %d\n", in->port);
+
+       return ret;
 }
 
 /**
@@ -3081,6 +3092,8 @@ void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
        if (ret)
                tb_sw_warn(sw, "failed to de-allocate DP resource for port %d\n",
                           in->port);
+       else
+               tb_sw_dbg(sw, "released DP resource for port %d\n", in->port);
 }
 
 struct tb_sw_lookup {