Messages in this thread Patch in this message | | | Date | Tue, 24 Nov 2020 18:07:03 -0800 | Subject | [PATCH v1] usb: typec: tcpm: Disregard vbus off while in PR_SWAP_SNK_SRC_SOURCE_ON | From | Badhri Jagan Sridharan <> |
| |
During PR_SWAP sequence, when TCPM is waiting in PR_SWAP_SNK_SRC_SOURCE_ON for the vbus source to ramp up, TCPM would prematurely exit PR_SWAP_SNK_SRC_SOURCE_ON and transition to SNK_UNATTACHED state when a vbus off notification is received. This should not be the case as vbus can still be off while in PR_SWAP_SNK_SRC_SOURCE_ON and the vbus source has PD_T_NEWSRC to ramp up.
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> --- drivers/usb/typec/tcpm/tcpm.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 4aac0efdb720..277b9d4d9c84 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -4218,6 +4218,14 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port) /* Do nothing, expected */ break; + case PR_SWAP_SNK_SRC_SOURCE_ON: + /* + * Do nothing when vbus off notification is received. + * TCPM can wait for PD_T_NEWSRC in PR_SWAP_SNK_SRC_SOURCE_ON + * for the vbus source to ramp up. + */ + break; + case PORT_RESET_WAIT_OFF: tcpm_set_state(port, tcpm_default_state(port), 0); break; -- 2.29.2.454.gaff20da3a2-goog
| |