diff options
| author | Caveh Jalali <caveh@chromium.org> | 2022-08-09 02:54:32 -0700 |
|---|---|---|
| committer | Chromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com> | 2022-08-12 21:15:25 +0000 |
| commit | a0befd973ce613e65c474efd365a73eb54f1d911 (patch) | |
| tree | 03145764d68a01c1be33b70b419f60d9c8393d63 /driver | |
| parent | 6e832755e66110947f9dd29686163dc108ba40a6 (diff) | |
| download | chrome-ec-a0befd973ce613e65c474efd365a73eb54f1d911.tar.gz | |
drivers/usb_mux: Allow inverted polarity on muxes
This adds a feature for USB-C muxes to be inverted with respect to cable
orientation. This effectively adds support for the case where CC1/CC2
are swapped.
BRANCH=none
BUG=b:240938782
TEST=USB3 and DP works on ghost MLB port with rest of patchset
Change-Id: I1441810754078c51ff46f84106aa33e8eb813eb0
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3818926
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Boris Mittelberg <bmbm@google.com>
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/usb_mux/usb_mux.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/driver/usb_mux/usb_mux.c b/driver/usb_mux/usb_mux.c index 723ad5711f..bde575bf7e 100644 --- a/driver/usb_mux/usb_mux.c +++ b/driver/usb_mux/usb_mux.c @@ -318,6 +318,10 @@ static int configure_mux(int port, int index, enum mux_config_type config, if (mux_ptr->flags & USB_MUX_FLAG_SET_WITHOUT_FLIP) lcl_state &= ~USB_PD_MUX_POLARITY_INVERTED; + if ((lcl_state != USB_PD_MUX_NONE) && + (mux_ptr->flags & USB_MUX_FLAG_POLARITY_INVERTED)) + lcl_state ^= USB_PD_MUX_POLARITY_INVERTED; + if (drv && drv->set) { rv = drv->set(mux_ptr, lcl_state, &ack_required); |