This is a note to let you know that I've just added the patch titled
Revert "usb: typec: tcpm: fix cc role at port reset"
to the 6.7-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:
revert-usb-typec-tcpm-fix-cc-role-at-port-reset.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b717dfbf73e842d15174699fe2c6ee4fdde8aa1f Mon Sep 17 00:00:00 2001
From: Badhri Jagan Sridharan <badhri@xxxxxxxxxx>
Date: Wed, 17 Jan 2024 11:47:42 +0000
Subject: Revert "usb: typec: tcpm: fix cc role at port reset"
From: Badhri Jagan Sridharan <badhri@xxxxxxxxxx>
commit b717dfbf73e842d15174699fe2c6ee4fdde8aa1f upstream.
This reverts commit 1e35f074399dece73d5df11847d4a0d7a6f49434.
Given that ERROR_RECOVERY calls into PORT_RESET for Hi-Zing
the CC pins, setting CC pins to default state during PORT_RESET
breaks error recovery.
4.5.2.2.2.1 ErrorRecovery State Requirements
The port shall not drive VBUS or VCONN, and shall present a
high-impedance to ground (above zOPEN) on its CC1 and CC2 pins.
Hi-Zing the CC pins is the inteded behavior for PORT_RESET.
CC pins are set to default state after tErrorRecovery in
PORT_RESET_WAIT_OFF.
4.5.2.2.2.2 Exiting From ErrorRecovery State
A Sink shall transition to Unattached.SNK after tErrorRecovery.
A Source shall transition to Unattached.SRC after tErrorRecovery.
Cc: stable@xxxxxxxxxxxxxxx
Cc: Frank Wang <frank.wang@xxxxxxxxxxxxxx>
Fixes: 1e35f074399d ("usb: typec: tcpm: fix cc role at port reset")
Signed-off-by: Badhri Jagan Sridharan <badhri@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240117114742.2587779-1-badhri@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/typec/tcpm/tcpm.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4862,8 +4862,7 @@ static void run_state_machine(struct tcp
break;
case PORT_RESET:
tcpm_reset_port(port);
- tcpm_set_cc(port, tcpm_default_state(port) == SNK_UNATTACHED ?
- TYPEC_CC_RD : tcpm_rp_cc(port));
+ tcpm_set_cc(port, TYPEC_CC_OPEN);
tcpm_set_state(port, PORT_RESET_WAIT_OFF,
PD_T_ERROR_RECOVERY);
break;
Patches currently in stable-queue which might be from badhri@xxxxxxxxxx are
queue-6.7/revert-usb-typec-tcpm-fix-cc-role-at-port-reset.patch
