pd: Ensure TCPC exits low power mode

Ensure the TCPC is awake when leaving PD_STATE_DRP_AUTO_TOGGLE and
when there is a new PD event to handle.

Move the exit_low_power_mode() call from the PD_STATE_DRP_AUTO_TOGGLE
case statement into set_state(), to catch all possible paths that
exit the state.

Add a new exit_low_power_mode() call to the top of the main task loop
if there is a new event to handle. This allows the exit_low_power_mode()
call to be removed from pd_update_dual_role_config() (since
PD_EVENT_UPDATE_DUAL_ROLE is included in PD_EXIT_LOW_POWER_EVENT_MASK).

Clear PD_FLAGS_LPM_REQUESTED when PD_FLAGS_LPM_ENGAGED is cleared in
handle_device_access() and wake the PD task to ensure we will make
another pass through the main task loop (and check the CC lines)
before deciding to enter low power mode again.

BRANCH=none
BUG=b:111663127,b:112039224
TEST=PD and TCPC low power still work on Grunt

Change-Id: I99063ce0d02af65de74f4c6f73f7a15600d2eac9
Signed-off-by: Edward Hill <ecgh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1225352
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Jett Rink <jettrink@chromium.org>

0 files changed, 0 insertions, 0 deletions