[PATCH 1/2][SRU][OEM-6.0/Unstable] thunderbolt: Explicitly reset plug events delay back to USB4 spec value

[You-Sheng Yang]

From: Mario Limonciello <mario.limonciello at amd.com>

BugLink: https://bugs.launchpad.net/bugs/1990922

If any software has interacted with the USB4 registers before the Linux
USB4 CM runs, it may have modified the plug events delay. It has been
observed that if this value too large, it's possible that hotplugged
devices will negotiate a fallback mode instead in Linux.

To prevent this, explicitly align the plug events delay with the USB4
spec value of 10ms.

Cc: stable at vger.kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg at linux.intel.com>
(cherry picked from commit 31f87f705b3c1635345d8e8a493697099b43e508 linux-next)
Signed-off-by: You-Sheng Yang (vicamo) <vicamo.yang at canonical.com>
---
 drivers/thunderbolt/switch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 5ca1fa665fed..c71c728ee33b 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2363,6 +2363,7 @@ int tb_switch_configure(struct tb_switch *sw)
 		 * additional capabilities.
 		 */
 		sw->config.cmuv = USB4_VERSION_1_0;
+		sw->config.plug_events_delay = 0xa;
 
 		/* Enumerate the switch */
 		ret = tb_sw_write(sw, (u32 *)&sw->config + 1, TB_CFG_SWITCH,
-- 
2.37.2