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04d1e94d10
In the kernel, it is possible for the DisplayPort Alt Mode
driver to queue an Enter Mode message to the tcpm and have
that message be interupted by a Power Role or Vconn swap,
which results in the Port Partner never entering Alt Mode.
Add a debounce that checks to make sure that the port partner
enters Alt Mode when DisplayPort Alt Mode is active on the
port. On trigger, reattempt to send Enter Mode through the
tcpm up to 2 times.
Test: Manual test on device - put device into Preferred
Source role, test to see if Alt Mode reentry triggers
when original entry is interrupted by PR Swap from
monitor.
Bug: 308383356
Change-Id: I96563c9900a01e428850e4873371bcdb0225aa07
Signed-off-by: RD Babiera <rdbabiera@google.com>