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Commit 4a32817f authored by Jack Pham's avatar Jack Pham Committed by Gerrit - the friendly Code Review server
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usb: pd: force disconnect upon unexpected SRC->SNK transition 



While in Source mode, a notification that a source is attached
is unexpected. In this case, force a disconnect in order to
clean up state and turn off VBUS and Vconn.

Change-Id: Ie576feeb7622376e8cb0dd8454b626b3b24b190b
Signed-off-by: default avatarJack Pham <jackp@codeaurora.org>
parent 3b399a41

drivers/usb/pd/policy_engine.c

+10 −0
Original line number Diff line number Diff line
@@ -2479,6 +2479,16 @@ static int psy_changed(struct notifier_block *nb, unsigned long evt, void *ptr) 
		if (pd->current_pr == PR_SINK)

			return 0;



		/*

		 * Unexpected if not in PR swap; need to force disconnect from

		 * source so we can turn off VBUS, Vconn, PD PHY etc.

		 */

		if (pd->current_pr == PR_SRC) {

			usbpd_info(&pd->dev, "Forcing disconnect from source mode\n");

			pd->current_pr = PR_NONE;

			break;

		}



		pd->current_pr = PR_SINK;

		break;