This is a note to let you know that I've just added the patch titled
usb: typec: tcpm: handle SRC_STARTUP state if cc changes
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-typec-tcpm-handle-src_startup-state-if-cc-changes.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6d91017a295e9790eec02c4e43f020cdb55f5d98 Mon Sep 17 00:00:00 2001
From: Xu Yang <xu.yang_2@xxxxxxx>
Date: Tue, 28 Sep 2021 19:16:39 +0800
Subject: usb: typec: tcpm: handle SRC_STARTUP state if cc changes
From: Xu Yang <xu.yang_2@xxxxxxx>
commit 6d91017a295e9790eec02c4e43f020cdb55f5d98 upstream.
TCPM for DRP should do the same action as SRC_ATTACHED when cc changes in
SRC_STARTUP state. Otherwise, TCPM will transition to SRC_UNATTACHED state
which is not satisfied with the Type-C spec.
Per Type-C spec:
DRP port should move to Unattached.SNK instead of Unattached.SRC if sink
removed.
Fixes: 4b4e02c83167 ("typec: tcpm: Move out of staging")
cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Acked-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
Link: https://lore.kernel.org/r/20210928111639.3854174-1-xu.yang_2@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/typec/tcpm/tcpm.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3679,6 +3679,7 @@ static void _tcpm_cc_change(struct tcpm_
tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
break;
case SRC_ATTACHED:
+ case SRC_STARTUP:
case SRC_SEND_CAPABILITIES:
case SRC_READY:
if (tcpm_port_is_disconnected(port) ||
Patches currently in stable-queue which might be from xu.yang_2@xxxxxxx are
queue-5.4/usb-typec-tcpm-handle-src_startup-state-if-cc-changes.patch
