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usb-pd: Clear active contract bit before browning out system

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In the case where we are resetting Vbus and it is our only power source,
then we will brown out before we set the active port to 0.

BRANCH=none
BUG=none
TEST=Did a cold reset on grunt with no battery power. System booted as
normal.

Change-Id: I3823af6b0475e4cf8abbe12dd8ae4ceef26d1eab
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/911613
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Edward Hill <ecgh@chromium.org>
This commit is contained in:
Jett Rink
2018-02-09 08:31:02 -07:00
committed by chrome-bot
parent ff11702c40
commit 7a23aa72bf
1 changed files with 6 additions and 1 deletions
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7
common/usb_pd_protocol.c
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@@ -1853,13 +1853,18 @@ static void pd_partner_port_reset(int port)
(RESET_FLAG_BROWNOUT | RESET_FLAG_POWER_ON))
return;
/*
* Clear the active contract bit before we apply Rp in case we
* intentionally brown out because we cut off our only power supply.
*/
pd_set_saved_active(port, 0);
/* Provide Rp for 200 msec. or until we no longer have VBUS. */
tcpm_set_cc(port, TYPEC_CC_RP);
timeout = get_time().val + 200 * MSEC;
while (get_time().val < timeout && pd_is_vbus_present(port))
msleep(10);
pd_set_saved_active(port, 0);
}
#endif /* CONFIG_USB_PD_DUAL_ROLE */