typec role switch流程

• smblite_lib_typec_port_type_set
• schedule_delayed_work(&chg->role_reversal_check, msecs_to_jiffies(ROLE_REVERSAL_DELAY_MS));

• smblite_lib_typec_role_check_work
• ?

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  static void smblite_lib_typec_role_check_work(struct work_struct *work) {         struct smb_charger *chg = container_of(work, struct smb_charger,                                         role_reversal_check.work);         int rc = 0;           if (chg->connector_type == POWER_SUPPLY_CONNECTOR_MICRO_USB) {                 chg->pr_swap_in_progress = false;                 vote(chg->awake_votable, TYPEC_SWAP_VOTER, false, 0);                 return;         }           mutex_lock(&chg->typec_lock);           switch (chg->dr_mode) {         case TYPEC_PORT_SNK:                 if (chg->typec_mode < POWER_SUPPLY_TYPEC_SOURCE_DEFAULT) {                         smblite_lib_dbg(chg, PR_MISC, "Role reversal not latched to UFP in %d msecs. Resetting to DRP mode\n",                                                 ROLE_REVERSAL_DELAY_MS);                         rc = smblite_lib_force_dr_mode(chg, TYPEC_PORT_DRP);                         if (rc < 0)                                 smblite_lib_err(chg, "Couldn't to set DRP mode, rc=%d\n",                                                 rc);                 } else {                         chg->power_role = POWER_SUPPLY_TYPEC_PR_SINK;                         typec_set_pwr_role(chg->typec_port, TYPEC_SINK);                         typec_set_data_role(chg->typec_port, TYPEC_DEVICE);                         smblite_lib_dbg(chg, PR_MISC, "Role changed successfully to SINK");                 }                 break;         case TYPEC_PORT_SRC:                 if (chg->typec_mode >= POWER_SUPPLY_TYPEC_SOURCE_DEFAULT                         || chg->typec_mode == POWER_SUPPLY_TYPEC_NONE) {                         smblite_lib_dbg(chg, PR_MISC, "Role reversal not latched to DFP in %d msecs. Resetting to DRP mode\n",                                                 ROLE_REVERSAL_DELAY_MS);                         chg->pr_swap_in_progress = false;                         chg->typec_role_swap_failed = true;                         rc = smblite_lib_force_dr_mode(chg,                                                         TYPEC_PORT_DRP);                         if (rc < 0)                                 smblite_lib_err(chg, "Couldn't to set DRP mode, rc=%d\n",                                                         rc);                 } else {                         chg->power_role = POWER_SUPPLY_TYPEC_PR_SOURCE;                         typec_set_pwr_role(chg->typec_port, TYPEC_SOURCE);                         typec_set_data_role(chg->typec_port, TYPEC_HOST);                         smblite_lib_dbg(chg, PR_MISC, "Role changed successfully to SOURCE");                 }                 break;         default:                 pr_debug("Already in DRP mode\n");                 break;         }           chg->pr_swap_in_progress = false;         vote(chg->awake_votable, TYPEC_SWAP_VOTER, false, 0);         mutex_unlock(&chg->typec_lock); }