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usb pd: Increasing delay for Rp time on CC lines

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Some chargers don't respect the SRC.Open state within the 20ms allotted by
the usb spec. The LiteOn Charger seems to notice after ~120ms bumping to
200ms so we cutoff Vbus for even ill-behaved chargers. We expect to brown
out in the sleep.

BRANCH=none
TEST=LiteOn charge will disconnect now
BUG=b:72510370

Change-Id: Ief0e999ed52f39420eed5f07432273e741a14c7e
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/886833
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
This commit is contained in:
Jett Rink
2018-01-25 16:07:39 -07:00
committed by chrome-bot
parent 9c06f2f1c2
commit a5c21c4ffe
1 changed files with 2 additions and 2 deletions
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4
common/usb_pd_protocol.c
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@@ -1829,9 +1829,9 @@ static void pd_partner_port_reset(int port)
(RESET_FLAG_BROWNOUT | RESET_FLAG_POWER_ON))
return;
/* Provide Rp for 100 msec. or until we no longer have VBUS. */
/* Provide Rp for 200 msec. or until we no longer have VBUS. */
tcpm_set_cc(port, TYPEC_CC_RP);
timeout = get_time().val + 100 * MSEC;
timeout = get_time().val + 200 * MSEC;
while (get_time().val < timeout && pd_is_vbus_present(port))
msleep(10);