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| author | yu-an.chen <yu-an.chen@quanta.corp-partner.google.com> | 2021-01-13 13:39:59 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-01-25 05:33:57 +0000 |
| commit | 8b5963199b0a7da1274b8ce6296745e01ebba079 (patch) | |
| tree | b436e490c7da041f588750eac991676c68a9ddb5 /driver/bc12 | |
| parent | 7ac3b8771f961d0e9bda31e68f37ad7b0ca9af6c (diff) | |
| download | chrome-ec-8b5963199b0a7da1274b8ce6296745e01ebba079.tar.gz | |
max14637: Switch should not be kept open when PD adapter is disconnected
Root Cause:
D+ and D- of PD adapter are shorted so chip would detect PD adapter as
the DCP. As a result, chip would set USB 2 switch open based on product
spec. Later on once USB 2.0 storage is attached, DUT can't recognize it
because USB 2.0 data path is blocked by chip now before introducing this
CL.
Solution:
Whenever adapter or USB client device is disconnected from a port of DUT,
we re-trigger the bc12_detect() so chip will be off then on for detecting
the status again. In this case, the D+/D- are NC so chip will detect it
as the SDP and keep this status afterward.
When USB 2.0 storage is connected later, bc12_detect will not be called
again due to DUT is in source role. At this moment, USB switch is closed
so USB 2.0 path is good. And there is no BC12 detecting cycle happened
so we will not hit issue resolved in CL:*2364342 as well.
When adapter is connected again, bc12_detect will be triggered for
detecting DCP / SDP / CDP.
BUG=b:177265749
BRANCH=octopus
TEST=make buildall -j 8
TEST=check lsblk , usb2 device is exist after reproduce step
Signed-off-by: yu-an.chen@quanta.corp-partner.google.com
Change-Id: I769e9f97daf86992259d8da0bbb38a1068bd8a5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2626791
Tested-by: Yu-An Chen <yu-an.chen@quanta.corp-partner.google.com>
Reviewed-by: Marco Chen <marcochen@chromium.org>
Commit-Queue: Marco Chen <marcochen@chromium.org>
Diffstat (limited to 'driver/bc12')
| -rw-r--r-- | driver/bc12/max14637.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/driver/bc12/max14637.c b/driver/bc12/max14637.c index de0971132d..a2bbfd4fb7 100644 --- a/driver/bc12/max14637.c +++ b/driver/bc12/max14637.c @@ -144,6 +144,7 @@ static void detect_or_power_down_ic(const int port) } else { /* Let charge manager know there's no more charge available. */ charge_manager_update_charge(CHARGE_SUPPLIER_OTHER, port, NULL); + bc12_detect(port); #if defined(CONFIG_POWER_PP5000_CONTROL) && defined(HAS_TASK_CHIPSET) /* Issue a request to turn off the rail. */ power_5v_enable(task_get_current(), 0); |