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| author | Vic Yang <victoryang@chromium.org> | 2013-06-09 17:37:20 +0800 |
|---|---|---|
| committer | ChromeBot <chrome-bot@google.com> | 2013-06-13 17:21:36 -0700 |
| commit | 2a270f5978d974dba0e12f7ac74636a396ce0cde (patch) | |
| tree | 69ff2e996bc12461dcdee9868eb75503b819af13 /test/utils.c | |
| parent | cc9b3464e26e112b2c220455a3938235f8553a2c (diff) | |
| download | chrome-ec-2a270f5978d974dba0e12f7ac74636a396ce0cde.tar.gz | |
Incorporate CABLE_DET circuit change
Now that when ID_MUX=1, DP_SNS can be connected to either ID_OUT or
CABLE_DET, we need to handle the case where a video dongle is not
reflected by DP_SNS going low. This is done by leaving ID_MUX=1 for USB
host and monitor its detachment by sensing VBUS. As for unpowered
dongle, we just ignore it when it's not recognized.
Note that due to the polarity of CABLE_DET, we now sense dongle
detachement by DP_SNS < 0.25V. To support older boards with ID_OUT
connected, we also disconnect video dongle on system suspend and
shutdown.
BUG=chrome-os-partner:19911
TEST=Powered/unpowered video dongle detected correctly.
TEST=Add a console command to simulate CABLE_DET being high. With that,
check battery charges with powered video dongle. Check nothing happens
with unpowered video dongle.
TEST=Check video dongle considered disconnected when OTG dongle plugged
in or system shutdown.
BRANCH=spring
Change-Id: If7b530b67c98c85017ca663d43c5148f0eb9163c
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/58070
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'test/utils.c')
0 files changed, 0 insertions, 0 deletions