TCPMv2: Prepare for boards using USB mux task

For boards using USB mux tasks, mux sets will be running in a task
parallel to the PD task.  This means we need to restructure any mux sets
which have required PD sequencing, such as setting USB safe state before
mode entry and DP configure.  Restructure the DPM and associated code to
account for the mux set taking some amount of time before VDMs may
proceed.

For the TBT module, align the module states to always indicate the
message the state is sending (ex. enter SOP will only send from
TBT_ENTER_SOP now).

This includes a couple of functional changes for boards:
- All boards will now set safe state before configuring DP pins, even if
their board functions previously did not
- TBT mode exit will now set safe state once before SOP exit, rather
than bouncing between safe state and USB mode after each exit ACK, which
matches more closely with how mode entry is currently working.
- USB4 exit will leave safe state set for TBT cable exit if active

BRANCH=None
BUG=b:172222942,b:186777984
TEST=on voxel with no mux task, pass tast typec.Mode*.manual

Signed-off-by: Diana Z <dzigterman@chromium.org>
Change-Id: I9d9fb6087199fba04084f57cefb31f3cb45c28e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3078417
Reviewed-by: Abe Levkoy <alevkoy@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/usb_pd_dpm.h b/include/usb_pd_dpm.h
index 4a389b2116..18b73fca84 100644
--- a/include/usb_pd_dpm.h
+++ b/include/usb_pd_dpm.h
@@ -113,6 +113,7 @@ enum dpm_msg_setup_status {
 	MSG_SETUP_SUCCESS,
 	MSG_SETUP_ERROR,
 	MSG_SETUP_UNSUPPORTED,
+	MSG_SETUP_MUX_WAIT,
 };
 
 #endif  /* __CROS_EC_USB_DPM_H */