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| author | Jett Rink <jettrink@chromium.org> | 2018-01-25 16:07:39 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-01-26 10:58:55 -0800 |
| commit | a5c21c4ffe16eeee3da97b1138aa6b5556983e7d (patch) | |
| tree | 7d3ab6d37765f8bded2d194ef486c992e09f61dd | |
| parent | 9c06f2f1c2ba3da9545f4ee5e47d7d0faf308435 (diff) | |
| download | chrome-ec-a5c21c4ffe16eeee3da97b1138aa6b5556983e7d.tar.gz | |
usb pd: Increasing delay for Rp time on CC lines
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>
| -rw-r--r-- | common/usb_pd_protocol.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/common/usb_pd_protocol.c b/common/usb_pd_protocol.c index 5696f9559c..9aec67cbb6 100644 --- a/common/usb_pd_protocol.c +++ b/common/usb_pd_protocol.c @@ -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); |