diff mbox series

[v2] usb: typec: tcpm: Fix sink caps op current check

Message ID	20231015035838.2207567-1-badhri@google.com
State	New
Headers	Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 as permitted sender) client-ip=23.128.96.36; Date: Sun, 15 Oct 2023 03:58:38 +0000 Mime-Version: 1.0 Message-ID: <20231015035838.2207567-1-badhri@google.com> Subject: [PATCH v2] usb: typec: tcpm: Fix sink caps op current check 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, Badhri Jagan Sridharan <badhri@google.com> Content-Type: text/plain; charset="UTF-8" Precedence: bulk
Series	[v2] usb: typec: tcpm: Fix sink caps op current check \| [v2] usb: typec: tcpm: Fix sink caps op current check

Commit Message

Badhri Jagan Sridharan Oct. 15, 2023, 3:58 a.m. UTC

  TCPM checks for sink caps operational current even when PD is disabled.
This incorrectly sets tcpm_set_charge() when PD is disabled.
Check for sink caps only when PD is enabled.

[   97.572342] Start toggling
[   97.578949] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected]
[   99.571648] CC1: 0 -> 0, CC2: 0 -> 4 [state TOGGLING, polarity 0, connected]
[   99.571658] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS]
[   99.571673] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS]
[   99.741778] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms]
[   99.789283] CC1: 0 -> 0, CC2: 4 -> 5 [state SNK_DEBOUNCED, polarity 0, connected]
[   99.789306] state change SNK_DEBOUNCED -> SNK_DEBOUNCED [rev3 NONE_AMS]
[   99.903584] VBUS on
[   99.903591] state change SNK_DEBOUNCED -> SNK_ATTACHED [rev3 NONE_AMS]
[   99.903600] polarity 1
[   99.910155] enable vbus discharge ret:0
[   99.910160] Requesting mux state 1, usb-role 2, orientation 2
[   99.946791] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
[   99.946798] state change SNK_STARTUP -> SNK_DISCOVERY [rev3 NONE_AMS]
[   99.946800] Setting voltage/current limit 5000 mV 500 mA
[   99.946803] vbus=0 charge:=1
[  100.027139] state change SNK_DISCOVERY -> SNK_READY [rev3 NONE_AMS]
[  100.027145] Setting voltage/current limit 5000 mV 3000 mA
[  100.466830] VBUS on

Cc: stable@vger.kernel.org
Fixes: 34fde9ec08a3 ("FROMGIT: usb: typec: tcpm: not sink vbus if operational current is 0mA")
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
---
Changes since v1:
* Fix commit title and description to address comments from Guenter Roeck
---
 drivers/usb/typec/tcpm/tcpm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


base-commit: 1034cc423f1b4a7a9a56d310ca980fcd2753e11d

Comments

Guenter Roeck Oct. 15, 2023, 12:30 p.m. UTC | #1

On Sun, Oct 15, 2023 at 03:58:38AM +0000, Badhri Jagan Sridharan wrote:
> TCPM checks for sink caps operational current even when PD is disabled.
> This incorrectly sets tcpm_set_charge() when PD is disabled.
> Check for sink caps only when PD is enabled.
> 
> [   97.572342] Start toggling
> [   97.578949] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected]
> [   99.571648] CC1: 0 -> 0, CC2: 0 -> 4 [state TOGGLING, polarity 0, connected]
> [   99.571658] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS]
> [   99.571673] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS]
> [   99.741778] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms]
> [   99.789283] CC1: 0 -> 0, CC2: 4 -> 5 [state SNK_DEBOUNCED, polarity 0, connected]
> [   99.789306] state change SNK_DEBOUNCED -> SNK_DEBOUNCED [rev3 NONE_AMS]
> [   99.903584] VBUS on
> [   99.903591] state change SNK_DEBOUNCED -> SNK_ATTACHED [rev3 NONE_AMS]
> [   99.903600] polarity 1
> [   99.910155] enable vbus discharge ret:0
> [   99.910160] Requesting mux state 1, usb-role 2, orientation 2
> [   99.946791] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
> [   99.946798] state change SNK_STARTUP -> SNK_DISCOVERY [rev3 NONE_AMS]
> [   99.946800] Setting voltage/current limit 5000 mV 500 mA
> [   99.946803] vbus=0 charge:=1
> [  100.027139] state change SNK_DISCOVERY -> SNK_READY [rev3 NONE_AMS]
> [  100.027145] Setting voltage/current limit 5000 mV 3000 mA
> [  100.466830] VBUS on
> 
> Cc: stable@vger.kernel.org
> Fixes: 34fde9ec08a3 ("FROMGIT: usb: typec: tcpm: not sink vbus if operational current is 0mA")
> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
> ---
> Changes since v1:
> * Fix commit title and description to address comments from Guenter Roeck
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 6e843c511b85..994493481c24 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -4268,7 +4268,8 @@ static void run_state_machine(struct tcpm_port *port)
>  				current_lim = PD_P_SNK_STDBY_MW / 5;
>  			tcpm_set_current_limit(port, current_lim, 5000);
>  			/* Not sink vbus if operational current is 0mA */
> -			tcpm_set_charge(port, !!pdo_max_current(port->snk_pdo[0]));
> +			tcpm_set_charge(port, port->pd_supported ?
> +					!!pdo_max_current(port->snk_pdo[0]) : true);

Nit:
						!port->pd_supported || pdo_max_current(port->snk_pdo[0]

seems simpler. Otherwise

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

>  
>  			if (!port->pd_supported)
>  				tcpm_set_state(port, SNK_READY, 0);
> 
> base-commit: 1034cc423f1b4a7a9a56d310ca980fcd2753e11d
> -- 
> 2.42.0.655.g421f12c284-goog
>

Heikki Krogerus Oct. 19, 2023, 6:45 a.m. UTC | #2

On Sun, Oct 15, 2023 at 03:58:38AM +0000, Badhri Jagan Sridharan wrote:
> TCPM checks for sink caps operational current even when PD is disabled.
> This incorrectly sets tcpm_set_charge() when PD is disabled.
> Check for sink caps only when PD is enabled.
> 
> [   97.572342] Start toggling
> [   97.578949] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected]
> [   99.571648] CC1: 0 -> 0, CC2: 0 -> 4 [state TOGGLING, polarity 0, connected]
> [   99.571658] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS]
> [   99.571673] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS]
> [   99.741778] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms]
> [   99.789283] CC1: 0 -> 0, CC2: 4 -> 5 [state SNK_DEBOUNCED, polarity 0, connected]
> [   99.789306] state change SNK_DEBOUNCED -> SNK_DEBOUNCED [rev3 NONE_AMS]
> [   99.903584] VBUS on
> [   99.903591] state change SNK_DEBOUNCED -> SNK_ATTACHED [rev3 NONE_AMS]
> [   99.903600] polarity 1
> [   99.910155] enable vbus discharge ret:0
> [   99.910160] Requesting mux state 1, usb-role 2, orientation 2
> [   99.946791] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
> [   99.946798] state change SNK_STARTUP -> SNK_DISCOVERY [rev3 NONE_AMS]
> [   99.946800] Setting voltage/current limit 5000 mV 500 mA
> [   99.946803] vbus=0 charge:=1
> [  100.027139] state change SNK_DISCOVERY -> SNK_READY [rev3 NONE_AMS]
> [  100.027145] Setting voltage/current limit 5000 mV 3000 mA
> [  100.466830] VBUS on
> 
> Cc: stable@vger.kernel.org
> Fixes: 34fde9ec08a3 ("FROMGIT: usb: typec: tcpm: not sink vbus if operational current is 0mA")
> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>

Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> Changes since v1:
> * Fix commit title and description to address comments from Guenter Roeck
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 6e843c511b85..994493481c24 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -4268,7 +4268,8 @@ static void run_state_machine(struct tcpm_port *port)
>  				current_lim = PD_P_SNK_STDBY_MW / 5;
>  			tcpm_set_current_limit(port, current_lim, 5000);
>  			/* Not sink vbus if operational current is 0mA */
> -			tcpm_set_charge(port, !!pdo_max_current(port->snk_pdo[0]));
> +			tcpm_set_charge(port, port->pd_supported ?
> +					!!pdo_max_current(port->snk_pdo[0]) : true);
>  
>  			if (!port->pd_supported)
>  				tcpm_set_state(port, SNK_READY, 0);
> 
> base-commit: 1034cc423f1b4a7a9a56d310ca980fcd2753e11d
> -- 
> 2.42.0.655.g421f12c284-goog

Greg KH Oct. 21, 2023, 10:52 a.m. UTC | #3

On Sun, Oct 15, 2023 at 03:58:38AM +0000, Badhri Jagan Sridharan wrote:
> TCPM checks for sink caps operational current even when PD is disabled.
> This incorrectly sets tcpm_set_charge() when PD is disabled.
> Check for sink caps only when PD is enabled.
> 
> [   97.572342] Start toggling
> [   97.578949] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected]
> [   99.571648] CC1: 0 -> 0, CC2: 0 -> 4 [state TOGGLING, polarity 0, connected]
> [   99.571658] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS]
> [   99.571673] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS]
> [   99.741778] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms]
> [   99.789283] CC1: 0 -> 0, CC2: 4 -> 5 [state SNK_DEBOUNCED, polarity 0, connected]
> [   99.789306] state change SNK_DEBOUNCED -> SNK_DEBOUNCED [rev3 NONE_AMS]
> [   99.903584] VBUS on
> [   99.903591] state change SNK_DEBOUNCED -> SNK_ATTACHED [rev3 NONE_AMS]
> [   99.903600] polarity 1
> [   99.910155] enable vbus discharge ret:0
> [   99.910160] Requesting mux state 1, usb-role 2, orientation 2
> [   99.946791] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
> [   99.946798] state change SNK_STARTUP -> SNK_DISCOVERY [rev3 NONE_AMS]
> [   99.946800] Setting voltage/current limit 5000 mV 500 mA
> [   99.946803] vbus=0 charge:=1
> [  100.027139] state change SNK_DISCOVERY -> SNK_READY [rev3 NONE_AMS]
> [  100.027145] Setting voltage/current limit 5000 mV 3000 mA
> [  100.466830] VBUS on
> 
> Cc: stable@vger.kernel.org
> Fixes: 34fde9ec08a3 ("FROMGIT: usb: typec: tcpm: not sink vbus if operational current is 0mA")

This is obviously not a valid git id in Linus's tree, and our tools
reject it :(

thanks,

greg k-h

diff mbox series

Patch

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 6e843c511b85..994493481c24 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4268,7 +4268,8 @@  static void run_state_machine(struct tcpm_port *port)
 				current_lim = PD_P_SNK_STDBY_MW / 5;
 			tcpm_set_current_limit(port, current_lim, 5000);
 			/* Not sink vbus if operational current is 0mA */
-			tcpm_set_charge(port, !!pdo_max_current(port->snk_pdo[0]));
+			tcpm_set_charge(port, port->pd_supported ?
+					!!pdo_max_current(port->snk_pdo[0]) : true);
 
 			if (!port->pd_supported)
 				tcpm_set_state(port, SNK_READY, 0);