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usb: dwc2: Fix host exit from hibernation flow. 

In case when a hub is connected to DWC2 host
auto suspend occurs and host goes to
hibernation. When any device connected to hub
host hibernation exiting incorrectly.

- Added dwc2_hcd_rem_wakeup() function call to
  exit from suspend state by remote wakeup.

- Increase timeout value for port suspend bit to be set.

Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Artur Petrosyan <arturp@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Artur Petrosyan 2018-05-23 09:26:08 -04:00 committed by Felipe Balbi
parent 9925e6ebe5
commit 22bb5cfdf1
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/dwc2/hcd.c
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@ -5435,7 +5435,7 @@ int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg)
dwc2_writel(hprt0, hsotg->regs + HPRT0);
/* Wait for the HPRT0.PrtSusp register field to be set */
if (dwc2_hsotg_wait_bit_set(hsotg, HPRT0, HPRT0_SUSP, 300))
if (dwc2_hsotg_wait_bit_set(hsotg, HPRT0, HPRT0_SUSP, 3000))
dev_warn(hsotg->dev, "Suspend wasn't generated\n");
/*
@ -5616,6 +5616,8 @@ int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
return ret;
}
dwc2_hcd_rem_wakeup(hsotg);
hsotg->hibernated = 0;
hsotg->bus_suspended = 0;
hsotg->lx_state = DWC2_L0;