Commit 050161ea authored by Guenter Roeck's avatar Guenter Roeck Committed by Greg Kroah-Hartman

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: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 193a6801
......@@ -2607,6 +2607,14 @@ static void run_state_machine(struct tcpm_port *port)
break;
case PR_SWAP_SRC_SNK_SOURCE_OFF:
tcpm_set_cc(port, TYPEC_CC_RD);
/*
* USB-PD standard, 6.2.1.4, Port Power Role:
* "During the Power Role Swap Sequence, for the initial Source
* Port, the Port Power Role field shall be set to Sink in the
* PS_RDY Message indicating that the initial Source’s power
* supply is turned off"
*/
tcpm_set_pwr_role(port, TYPEC_SINK);
if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
tcpm_set_state(port, ERROR_RECOVERY, 0);
break;
......@@ -2614,7 +2622,6 @@ static void run_state_machine(struct tcpm_port *port)
tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
break;
case PR_SWAP_SRC_SNK_SINK_ON:
tcpm_set_pwr_role(port, TYPEC_SINK);
tcpm_swap_complete(port, 0);
tcpm_set_state(port, SNK_STARTUP, 0);
break;
......@@ -2626,8 +2633,15 @@ static void run_state_machine(struct tcpm_port *port)
case PR_SWAP_SNK_SRC_SOURCE_ON:
tcpm_set_cc(port, tcpm_rp_cc(port));
tcpm_set_vbus(port, true);
tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
/*
* USB PD standard, 6.2.1.4:
* "Subsequent Messages initiated by the Policy Engine,
* such as the PS_RDY Message sent to indicate that Vbus
* is ready, will have the Port Power Role field set to
* Source."
*/
tcpm_set_pwr_role(port, TYPEC_SOURCE);
tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
tcpm_swap_complete(port, 0);
tcpm_set_state(port, SRC_STARTUP, 0);
break;
......
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