[PATCH 5/5][SRU][J] thunderbolt: Add debug logging of DisplayPort resource allocation

AceLan Kao acelan.kao at canonical.com
Tue Mar 8 08:49:09 UTC 2022


From: Mika Westerberg <mika.westerberg at linux.intel.com>

BugLink: https://bugs.launchpad.net/bugs/1955016

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

Signed-off-by: Mika Westerberg <mika.westerberg at linux.intel.com>
(cherry picked from commit ce05b997426df4c5321358e369f1f32f257c57a9)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/thunderbolt/switch.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index e00f4b878b56..13f9230104d7 100644
--- 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 {
-- 
2.25.1




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