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| author | Nicolas Boichat <drinkcat@google.com> | 2016-12-02 11:42:11 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-12-14 06:02:54 -0800 |
| commit | 87e8cd610313fa7fe902c2fd359ade18e6b22ef0 (patch) | |
| tree | 8c9468648b1347e6c411f9bc3f15008d5a11e6ea /common/usb_pd_policy.c | |
| parent | a573d17be93b52e6b3cb0ab7bf374199091752f4 (diff) | |
| download | chrome-ec-87e8cd610313fa7fe902c2fd359ade18e6b22ef0.tar.gz | |
usb_pd_policy: Automatically swap vconn if adapter requests it
During discovery, if adapter requests vconn power in the AMA flags,
make sure that we provide vconn.
This, for example, is necessary for the Apple HDMI adapter to work
on boot, when connected in S5. In that case, adapter does request
vconn swap, but we reject that as the system is off, and, therefore
5V supply is off. On boot, we send another discovery request, which
will detect this case and swap the power.
BRANCH=none
BUG=chromium:644663
TEST=On elm, S5. Plug adapter with power+HDMI. Switch on elm,
type "pd 0 vdm ident" in console, display works.
Change-Id: I55b6658c2bc0574b8427ae086f61daf03730a725
Reviewed-on: https://chromium-review.googlesource.com/415697
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'common/usb_pd_policy.c')
| -rw-r--r-- | common/usb_pd_policy.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/common/usb_pd_policy.c b/common/usb_pd_policy.c index 9c42f5f5a3..fe204b9301 100644 --- a/common/usb_pd_policy.c +++ b/common/usb_pd_policy.c @@ -271,8 +271,13 @@ static void dfp_consume_identity(int port, int cnt, uint32_t *payload) */ if (!PD_VDO_AMA_VBUS_REQ(payload[VDO_I(AMA)])) pd_power_supply_reset(port); + +#if defined(CONFIG_USB_PD_DUAL_ROLE) && defined(CONFIG_USBC_VCONN_SWAP) + /* Adapter is requesting vconn, try to supply it */ + if (PD_VDO_AMA_VCONN_REQ(payload[VDO_I(AMA)])) + pd_try_vconn_src(port); +#endif break; - /* TODO(crosbug.com/p/30645) provide vconn support here */ default: break; } |