[PATCH v4 10/13] usb: typec: tcpm: set cc for drp toggling attach
From: Li Jun <hidden>
Date: 2018-03-28 16:06:15
Also in:
linux-usb
Subsystem:
the rest, usb subsystem, usb typec class · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Heikki Krogerus
In case of drp toggling, we may need set correct cc value for role control after attach as it may never been set. Signed-off-by: Li Jun <redacted> --- drivers/usb/typec/tcpm.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index 218c230..72d4232 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c@@ -2126,6 +2126,7 @@ static void tcpm_reset_port(struct tcpm_port *port) tcpm_set_attached_state(port, false); port->try_src_count = 0; port->try_snk_count = 0; + port->cc_req = 0; } static void tcpm_detach(struct tcpm_port *port)
@@ -2361,6 +2362,8 @@ static void run_state_machine(struct tcpm_port *port) break; case SRC_ATTACHED: + if (!port->cc_req) + tcpm_set_cc(port, tcpm_rp_cc(port)); ret = tcpm_src_attach(port); tcpm_set_state(port, SRC_UNATTACHED, ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
@@ -2531,6 +2534,8 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); break; case SNK_ATTACHED: + if (!port->cc_req) + tcpm_set_cc(port, TYPEC_CC_RD); ret = tcpm_snk_attach(port); if (ret < 0) tcpm_set_state(port, SNK_UNATTACHED, 0);
--
2.7.4