FROMGIT: usb: typec: tcpm: Stay in SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS till Rp is seen

TD.4.7.3. Try SNK DRP Connect Try.SRC DRP fails. The compliance
tester mimics being a Try.SRC USB-C port.
The failure is due to TCPM exiting SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS
when VBUS is not present eventhough when SNK.Rp is seen. Exit to
SRC_TRYWAIT from SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS only when SNK.Rp
is not seen for PD_T_TRY_CC_DEBOUNCE.

>From the spec:
The port shall then transition to Attached.SNK when the SNK.Rp state
is detected on exactly one of the CC1 or CC2 pins for at least
tTryCCDebounce and VBUS is detected. Alternatively, the port shall
transition to TryWait.SRC if SNK.Rp state is not detected for
tTryCCDebounce.

Bug: 158724104
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20201125014804.1596719-1-badhri@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 733315532b90d8dccfdc2d0d2744db4559d40e80
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
(cherry picked from commit ee1142f3cbf23af75db98d235b5cbf950421ad9c)
(cherry picked from commit a723b4dd4fb4e44d4925ac52b1cca512f47bb1ab)
Signed-off-by: Will McVicker <willmcvicker@google.com>
(cherry picked from commit 10a1f26e421c83c7a3590a7c41211773ffd74a5f)
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: Ieee7069dab909604291c331d7468e1408ada0a5e