This helps debugging issues around DisplayPort bandwidth allocation
mode.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/thunderbolt/usb4.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index 4b35898aa216..f4fba144105d 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -2858,8 +2858,10 @@ static int usb4_dp_port_wait_and_clear_cm_ack(struct tb_port *port,
usleep_range(50, 100);
} while (ktime_before(ktime_get(), end));
- if (val & ADP_DP_CS_8_DR)
+ if (val & ADP_DP_CS_8_DR) {
+ tb_port_warn(port, "timeout waiting for DPTX request to clear\n");
return -ETIMEDOUT;
+ }
ret = tb_port_read(port, &val, TB_CFG_PORT,
port->cap_adap + ADP_DP_CS_2, 1);
--
2.43.0
