staging: typec: tcpm: Report right typec_pwr_opmode

At present, TCPM does not take into account the actual resistor
value presented in the CC line and therefore reports TYPEC_PWR_MODE_USB
irrespective of the power_op_mode it is in.
This patch makes TCPM consider the actual value of Rp.

Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/typec/tcpm.c b/drivers/staging/typec/tcpm.c
index 6df72f6..903261e 100644 (file)
--- a/drivers/staging/typec/tcpm.c
+++ b/drivers/staging/typec/tcpm.c
@@ -2130,9 +2130,23 @@ static void tcpm_swap_complete(struct tcpm_port *port, int result)
        }
 }
 
+enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
+{
+       switch (cc) {
+       case TYPEC_CC_RP_1_5:
+               return TYPEC_PWR_MODE_1_5A;
+       case TYPEC_CC_RP_3_0:
+               return TYPEC_PWR_MODE_3_0A;
+       case TYPEC_CC_RP_DEF:
+       default:
+               return TYPEC_PWR_MODE_USB;
+       }
+}
+
 static void run_state_machine(struct tcpm_port *port)
 {
        int ret;
+       enum typec_pwr_opmode opmode;
 
        port->enter_state = port->state;
        switch (port->state) {
@@ -2209,7 +2223,8 @@ static void run_state_machine(struct tcpm_port *port)
                               ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
                break;
        case SRC_STARTUP:
-               typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_USB);
+               opmode =  tcpm_get_pwr_opmode(tcpm_rp_cc(port));
+               typec_set_pwr_opmode(port->typec_port, opmode);
                port->pwr_opmode = TYPEC_PWR_MODE_USB;
                port->caps_count = 0;
                port->message_id = 0;
@@ -2371,7 +2386,9 @@ static void run_state_machine(struct tcpm_port *port)
                break;
        case SNK_STARTUP:
                /* XXX: callback into infrastructure */
-               typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_USB);
+               opmode =  tcpm_get_pwr_opmode(port->polarity ?
+                                             port->cc2 : port->cc1);
+               typec_set_pwr_opmode(port->typec_port, opmode);
                port->pwr_opmode = TYPEC_PWR_MODE_USB;
                port->message_id = 0;
                port->rx_msgid = -1;