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| author | Wai-Hong Tam <waihong@google.com> | 2021-05-18 15:11:53 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-05-20 23:08:05 +0000 |
| commit | 2663f98dd8c0aaf21f2e119d71d95be8241f5a63 (patch) | |
| tree | 5967983a1ee04bc470e323f5129eb370df3473f9 /common/usbc | |
| parent | b3367a2fcc57d04c4b9abbfcd291fef25c837797 (diff) | |
| download | chrome-ec-2663f98dd8c0aaf21f2e119d71d95be8241f5a63.tar.gz | |
TCPMv2: Seed the charge manger in Attached.SRCstabilize-13983.B-main
When EC reboots, the TCPMv2 stack initializes the Type-C supplier in
either staying in Unattached.SNK (debounced that nothing is attached
to the connector) or transition to Attached.SNK (exclude the PRS
case), in order to seed the charge manager.
However, if the state transits to Attached.SRC from Unattached.SNK
via Try.SRC. The charge manger has never been seeded. It happens when
a DRP (like a Type-C hub) is attached during reboot. It may then
transit to Attached.SNK through a Power-Role-Swap. However, the PRS
case is excluded to seed the charge manger.
This CL initializes the Type-C supplier to 0 in the Attached.SRC state.
It seeds the charge manger. So all cases (Unattached.SNK, Attached.SNK,
Attached.SRC) are covered.
BRANCH=None
BUG=b:188532782
TEST=Attach a powered Type-C hub; reboot EC; the charge manger is
seeded; the charge port is selected; the power sink path is enabled.
Change-Id: I8fbfc1c4ffc5c9a9a8a49fcc36d67da93d01c403
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2904562
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'common/usbc')
| -rw-r--r-- | common/usbc/usb_tc_drp_acc_trysrc_sm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/common/usbc/usb_tc_drp_acc_trysrc_sm.c b/common/usbc/usb_tc_drp_acc_trysrc_sm.c index c2e47f7906..b73b8ecf25 100644 --- a/common/usbc/usb_tc_drp_acc_trysrc_sm.c +++ b/common/usbc/usb_tc_drp_acc_trysrc_sm.c @@ -3011,6 +3011,10 @@ static void tc_attached_src_entry(const int port) /* Inform PPC and OCP module that a sink is connected. */ tc_set_partner_role(port, PPC_DEV_SNK); + /* Initialize type-C supplier to seed the charge manger */ + if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) + typec_set_input_current_limit(port, 0, 0); + /* * Only notify if we're not performing a power role swap. During a * power role swap, the port partner is not disconnecting/connecting. |