Commit e4a840a4 authored Jun 02, 2020 by Sriharsha Allenki Committed by Gerrit - the friendly Code Review server Jun 09, 2020

usb: dwc3: Do not drive a pulse on DP for EUD connect event



With the commit 89bf4e6b ("dwc3: Handle USB spoof
disconnect when EUD is enabled") irrespective of the source
of connect event, a pulse is driven on DP in the case where
the device is connected to a CDP.
In this case if the EUD is enabled after the device has
already been enumerated on a CDP it results in a enumeration
failure. Fix this by preventing the driving a pulse on DP
when the connect event in from the EUD.

Change-Id: I31bc4bfd012e98522caefdfc5e8d31af47b7154a
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>

parent 030a765f

drivers/usb/dwc3/dwc3-msm.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -3316,8 +3316,12 @@ static int dwc3_msm_vbus_notifier(struct notifier_block *nb,
		mdwc->vbus_active = event;
		}

		/*
		* Drive a pulse on DP to ensure proper CDP detection
		* and only when the vbus connect event is a valid one.
		*/
		if (get_psy_type(mdwc) == POWER_SUPPLY_TYPE_USB_CDP &&
		mdwc->vbus_active) {
		mdwc->vbus_active && !mdwc->check_eud_state) {
		dev_dbg(mdwc->dev, "Connected to CDP, pull DP up\n");
		usb_phy_drive_dp_pulse(mdwc->hs_phy, DP_PULSE_WIDTH_MSEC);
		}