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FROMLIST: usb: typec: tcpm: Fix sink caps op current check

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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

Bug: 307718635
Bug: 304820253
Link: https://lore.kernel.org/all/20231101012845.2701348-1-badhri@google.com/
Cc: stable@vger.kernel.org
Fixes: 803b1c8a0cea ("usb: typec: tcpm: not sink vbus if operational current is 0mA")
Change-Id: Id780b77a37b4c9d6cde286ae089ac41852633800
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Will McVicker <willmcvicker@google.com>
Signed-off-by: Will McVicker <willmcvicker@google.com>
This commit is contained in:
Badhri Jagan Sridharan 2023-11-01 01:28:45 +00:00 committed by Matthias Männich
parent 9d6ac9dc6a
commit abcd4c51e7
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/typec/tcpm/tcpm.c
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@ -4289,7 +4289,8 @@ 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]));
if (!port->pd_supported)
tcpm_set_state(port, SNK_READY, 0);