diff options
| author | Xu Yang <[email protected]> | 2023-08-01 15:01:10 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2023-08-04 14:47:50 +0200 |
| commit | 803b1c8a0cea58cccde16eba31d285956f4c920c (patch) | |
| tree | b87c05c1ce1dff380609d06ca8c82b59fed7009b | |
| parent | 2569088dbaaff6401630bda517db2e1ac4d92692 (diff) | |
usb: typec: tcpm: not sink vbus if operational current is 0mA
PD3.0 Spec 6.4.1.3.1 said:
For a Sink requiring no power from the Source, the Voltage (B19-10)
shall be set to 5V and the Operational Current Shall be set to 0mA.
Therefore, we can keep sink path closed if the operational current of
the first fixed PDO is 0mA.
Signed-off-by: Xu Yang <[email protected]>
Acked-by: Heikki Krogerus <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
| -rw-r--r-- | drivers/usb/typec/tcpm/tcpm.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 9c496b8302b4..5a7d8cc04628 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -4231,7 +4231,9 @@ static void run_state_machine(struct tcpm_port *port) if (port->slow_charger_loop && (current_lim > PD_P_SNK_STDBY_MW / 5)) current_lim = PD_P_SNK_STDBY_MW / 5; tcpm_set_current_limit(port, current_lim, 5000); - tcpm_set_charge(port, true); + /* Not sink vbus if operational current is 0mA */ + tcpm_set_charge(port, !!pdo_max_current(port->snk_pdo[0])); + if (!port->pd_supported) tcpm_set_state(port, SNK_READY, 0); else @@ -4512,7 +4514,8 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_current_limit(port, tcpm_get_current_limit(port), 5000); - tcpm_set_charge(port, true); + /* Not sink vbus if operational current is 0mA */ + tcpm_set_charge(port, !!pdo_max_current(port->snk_pdo[0])); } if (port->ams == HARD_RESET) tcpm_ams_finish(port); |