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| author | Jan Dabros <jsd@semihalf.com> | 2021-08-12 11:38:48 +0200 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-08-25 17:45:21 +0000 |
| commit | 3f4dec3720c1d70a3265ee133e1c9154c7d89adf (patch) | |
| tree | 2471642df959af4badf1432f1784e7e11041eb2d /common | |
| parent | 7dddeb52f1f4e0d44b99424a7b8c69b38f48b996 (diff) | |
| download | chrome-ec-3f4dec3720c1d70a3265ee133e1c9154c7d89adf.tar.gz | |
pd: usb: Add usb type-c USB mux handling for UFP-only platforms
Some platforms (e.g. servo_v4(p1)) are designed to act only as a
UFP considering superspeed terminations. Add config option to properly
manage usb superspeed muxer for such.
BUG=b:137887386,b:182419010
BRANCH=main
TEST=With servo_v4p1 connected to the DUT, unplug and replug CHG couple
of times in order to force PR_SWAP on DUT port. Each time verify
on the DUT console, whether all USB3 devices are visible. They
should be, since servo is trying to perform DR_SWAP when it acts
as a SRC.
Signed-off-by: Jan Dabros <jsd@semihalf.com>
Change-Id: I0a7756f0bb2192795b7489334ed01d317d3e54ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3094246
Reviewed-by: Michał Barnaś <mb@semihalf.com>
Reviewed-by: Wai-Hong Tam <waihong@google.com>
Commit-Queue: Wai-Hong Tam <waihong@google.com>
Diffstat (limited to 'common')
| -rw-r--r-- | common/usb_common.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/common/usb_common.c b/common/usb_common.c index a77771d9e4..97ebedc3d3 100644 --- a/common/usb_common.c +++ b/common/usb_common.c @@ -483,6 +483,12 @@ mux_state_t get_mux_mode_to_set(int port) pd_get_data_role(port) != PD_ROLE_DFP) return USB_PD_MUX_NONE; + /* If new data role isn't UFP & we only support UFP then disconnect. */ + if (IS_ENABLED(CONFIG_USB_PD_DUAL_ROLE) && + IS_ENABLED(CONFIG_USBC_SS_MUX_UFP_ONLY) && + pd_get_data_role(port) != PD_ROLE_UFP) + return USB_PD_MUX_NONE; + /* * If the power role is sink and the PD partner device is not capable * of USB communication then disconnect. |