[PATCH v5 1/4] usb: dwc3: core: Host wake up support from system suspend

Sandeep Maheswaram
2021-03-22T17:33:10Z

Avoiding phy powerdown when wakeup capable devices are connected.

Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
---
drivers/usb/dwc3/core.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 94fdbe5..9ecd7ac 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1702,7 +1702,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
dwc3_core_exit(dwc);
break;
case DWC3_GCTL_PRTCAP_HOST:
- if (!PMSG_IS_AUTO(msg)) {
+ if (!PMSG_IS_AUTO(msg) && dwc->phy_power_off) {
dwc3_core_exit(dwc);
break;
}
@@ -1763,13 +1763,15 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
spin_unlock_irqrestore(&dwc->lock, flags);
break;
case DWC3_GCTL_PRTCAP_HOST:
- if (!PMSG_IS_AUTO(msg)) {
+ if (!PMSG_IS_AUTO(msg) && dwc->phy_power_off) {
ret = dwc3_core_init_for_resume(dwc);
if (ret)
return ret;
dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
break;
- }
+ } else
+ dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
+
/* Restore GUSB2PHYCFG bits that were modified in suspend */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
if (dwc->dis_u2_susphy_quirk)
--
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