lkml.org 
[lkml]   [2021]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v6 2/5] usb: dwc3: core: Host wake up support from system suspend
Date
Avoiding phy powerdown when wakeup capable devices are connected
by checking phy_power_off flag.
Phy should be on to wake up the device from suspend using wakeup capable
devices such as keyboard and mouse.

Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
---
drivers/usb/dwc3/core.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 05e2e54c..3b88c62 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1701,7 +1701,7 @@ 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;
}
@@ -1762,13 +1762,16 @@ 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)
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
\
 
 \ /
  Last update: 2021-04-16 12:03    [W:6.091 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site