staging: typec: tcpm: Fix Port Power Role field in PS_RDY messages
PS_RDY messages sent during power swap sequences are expected to reflect the new power role. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2607,6 +2607,14 @@ static void run_state_machine(struct tcpm_port *port)
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break;
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case PR_SWAP_SRC_SNK_SOURCE_OFF:
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tcpm_set_cc(port, TYPEC_CC_RD);
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/*
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* USB-PD standard, 6.2.1.4, Port Power Role:
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* "During the Power Role Swap Sequence, for the initial Source
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* Port, the Port Power Role field shall be set to Sink in the
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* PS_RDY Message indicating that the initial Source’s power
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* supply is turned off"
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*/
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tcpm_set_pwr_role(port, TYPEC_SINK);
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if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
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tcpm_set_state(port, ERROR_RECOVERY, 0);
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break;
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@ -2614,7 +2622,6 @@ static void run_state_machine(struct tcpm_port *port)
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tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
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break;
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case PR_SWAP_SRC_SNK_SINK_ON:
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tcpm_set_pwr_role(port, TYPEC_SINK);
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tcpm_swap_complete(port, 0);
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tcpm_set_state(port, SNK_STARTUP, 0);
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break;
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@ -2626,8 +2633,15 @@ static void run_state_machine(struct tcpm_port *port)
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case PR_SWAP_SNK_SRC_SOURCE_ON:
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tcpm_set_cc(port, tcpm_rp_cc(port));
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tcpm_set_vbus(port, true);
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tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
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/*
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* USB PD standard, 6.2.1.4:
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* "Subsequent Messages initiated by the Policy Engine,
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* such as the PS_RDY Message sent to indicate that Vbus
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* is ready, will have the Port Power Role field set to
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* Source."
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*/
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tcpm_set_pwr_role(port, TYPEC_SOURCE);
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tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
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tcpm_swap_complete(port, 0);
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tcpm_set_state(port, SRC_STARTUP, 0);
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break;
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