Commit f74b9dbc authored Apr 02, 2019 by Ajay Agarwal Committed by Gerrit - the friendly Code Review server Dec 11, 2020

usb: dwc3-msm: Disable PHY wakeup IRQs on hibernation



There might be spurious HS PHY IRQ after USB bus has gone into
hibernation which leads to dwc3_msm_resume and in_lpm flag
getting cleared. Next when the restore from hibernation happens,
dwc3_msm_resume becomes a no-op but in reality, the HW resources
are all turned off. This leads to an unclocked access from
xhci_resume.
Fix this by disabling PHY wakeup IRQs on hibernation/pm_suspend
for automotive targets.

Change-Id: I753fb3593fca31f12406b9126f73f75520dab1b0
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>

parent aa860b5b

drivers/usb/dwc3/dwc3-msm.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -2965,11 +2965,11 @@ static int dwc3_msm_suspend(struct dwc3_msm *mdwc, bool force_power_collapse)
		atomic_set(&dwc->in_lpm, 1);

		/*
		* with DCP or during cable disconnect, we dont require wakeup
		* with the core in power collapse, we dont require wakeup
		* using HS_PHY_IRQ or SS_PHY_IRQ. Hence enable wakeup only in
		* case of host bus suspend and device bus suspend.
		*/
		if (mdwc->in_device_mode \|\| mdwc->in_host_mode) {
		if (!(mdwc->lpm_flags & MDWC3_POWER_COLLAPSE)) {
		if (mdwc->use_pdc_interrupts) {
		enable_usb_pdc_interrupt(mdwc, true);
		} else {