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From: Badhri Jagan Sridharan <badhri@google.com>
To: gregkh@linuxfoundation.org, linux@roeck-us.net,
	 heikki.krogerus@linux.intel.com
Cc: kyletso@google.com, linux-usb@vger.kernel.org,
	 linux-kernel@vger.kernel.org, rdbabiera@google.com,
	amitsd@google.com,  stable@vger.kernel.org,
	frank.wang@rock-chips.com,
	 Badhri Jagan Sridharan <badhri@google.com>
Subject: [PATCH v2] Revert "usb: typec: tcpm: fix cc role at port reset"
Date: Wed, 17 Jan 2024 11:47:42 +0000	[thread overview]
Message-ID: <20240117114742.2587779-1-badhri@google.com> (raw)

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@vger.kernel.org
Cc: Frank Wang <frank.wang@rock-chips.com>
Fixes: 1e35f074399d ("usb: typec: tcpm: fix cc role at port reset")
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
---
 drivers/usb/typec/tcpm/tcpm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 5945e3a2b0f7..9d410718eaf4 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4876,8 +4876,7 @@ static void run_state_machine(struct tcpm_port *port)
 		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;

base-commit: 933bb7b878ddd0f8c094db45551a7daddf806e00
-- 
2.43.0.429.g432eaa2c6b-goog


             reply	other threads:[~2024-01-17 11:47 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-17 11:47 Badhri Jagan Sridharan [this message]
2024-01-17 15:25 ` [PATCH v2] Revert "usb: typec: tcpm: fix cc role at port reset" Guenter Roeck
2024-01-18  9:35 ` Heikki Krogerus
2024-02-08 22:01 ` Mark Brown
2024-02-11 15:50   ` Gábor Stefanik

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