diff options
Diffstat (limited to 'common/usbc/usb_pe_drp_sm.c')
| -rw-r--r-- | common/usbc/usb_pe_drp_sm.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/common/usbc/usb_pe_drp_sm.c b/common/usbc/usb_pe_drp_sm.c index 9171b2fb94..e0a364240b 100644 --- a/common/usbc/usb_pe_drp_sm.c +++ b/common/usbc/usb_pe_drp_sm.c @@ -2016,6 +2016,8 @@ static void pe_sender_response_msg_entry(const int port) */ static enum pe_msg_check pe_sender_response_msg_run(const int port) { + timestamp_t tx_success_ts; + uint32_t offset; if (pd_timer_is_disabled(port, PE_TIMER_SENDER_RESPONSE)) { /* Check for Discard */ if (PE_CHK_FLAG(port, PE_FLAGS_MSG_DISCARDED)) { @@ -2034,9 +2036,19 @@ static enum pe_msg_check pe_sender_response_msg_run(const int port) if (PE_CHK_FLAG(port, PE_FLAGS_TX_COMPLETE)) { PE_CLR_FLAG(port, PE_FLAGS_TX_COMPLETE); - /* Initialize and run the SenderResponseTimer */ + /* TCPC TX success time stamp */ + tx_success_ts = prl_get_tcpc_tx_success_ts(port); + /* Calculate the delay from TX success to PE */ + offset = time_since32(tx_success_ts); + + /* + * Initialize and run the SenderResponseTimer by + * offsetting it with TX transmit success time. + * This would remove the effect of the latency from + * propagating the TX status. + */ pd_timer_enable(port, PE_TIMER_SENDER_RESPONSE, - PD_T_SENDER_RESPONSE); + PD_T_SENDER_RESPONSE - offset); return PE_MSG_SEND_COMPLETED; } return PE_MSG_SEND_PENDING; |