From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: Kyle Tso <kyletso@google.com>
Cc: linux@roeck-us.net, gregkh@linuxfoundation.org,
badhri@google.com, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH] usb: typec: tcpm: Ignore received Hard Reset in TOGGLING state
Date: Tue, 21 May 2024 16:54:06 +0300 [thread overview]
Message-ID: <ZkynfhXVI3M7qq0z@kuha.fi.intel.com> (raw)
In-Reply-To: <20240520154858.1072347-1-kyletso@google.com>
On Mon, May 20, 2024 at 11:48:58PM +0800, Kyle Tso wrote:
> Similar to what fixed in Commit a6fe37f428c1 ("usb: typec: tcpm: Skip
> hard reset when in error recovery"), the handling of the received Hard
> Reset has to be skipped during TOGGLING state.
>
> [ 4086.021288] VBUS off
> [ 4086.021295] pending state change SNK_READY -> SNK_UNATTACHED @ 650 ms [rev2 NONE_AMS]
> [ 4086.022113] VBUS VSAFE0V
> [ 4086.022117] state change SNK_READY -> SNK_UNATTACHED [rev2 NONE_AMS]
> [ 4086.022447] VBUS off
> [ 4086.022450] state change SNK_UNATTACHED -> SNK_UNATTACHED [rev2 NONE_AMS]
> [ 4086.023060] VBUS VSAFE0V
> [ 4086.023064] state change SNK_UNATTACHED -> SNK_UNATTACHED [rev2 NONE_AMS]
> [ 4086.023070] disable BIST MODE TESTDATA
> [ 4086.023766] disable vbus discharge ret:0
> [ 4086.023911] Setting usb_comm capable false
> [ 4086.028874] Setting voltage/current limit 0 mV 0 mA
> [ 4086.028888] polarity 0
> [ 4086.030305] Requesting mux state 0, usb-role 0, orientation 0
> [ 4086.033539] Start toggling
> [ 4086.038496] state change SNK_UNATTACHED -> TOGGLING [rev2 NONE_AMS]
>
> // This Hard Reset is unexpected
> [ 4086.038499] Received hard reset
> [ 4086.038501] state change TOGGLING -> HARD_RESET_START [rev2 HARD_RESET]
>
> Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)")
> Cc: stable@vger.kernel.org
> Signed-off-by: Kyle Tso <kyletso@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> ---
> drivers/usb/typec/tcpm/tcpm.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 8a1af08f71b6..9c1cb8c11bd6 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -6172,6 +6172,7 @@ static void _tcpm_pd_hard_reset(struct tcpm_port *port)
> port->tcpc->set_bist_data(port->tcpc, false);
>
> switch (port->state) {
> + case TOGGLING:
> case ERROR_RECOVERY:
> case PORT_RESET:
> case PORT_RESET_WAIT_OFF:
> --
> 2.45.0.rc1.225.g2a3ae87e7f-goog
--
heikki
prev parent reply other threads:[~2024-05-21 13:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-20 15:48 [PATCH] usb: typec: tcpm: Ignore received Hard Reset in TOGGLING state Kyle Tso
2024-05-21 13:54 ` Heikki Krogerus [this message]
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