Re: [PATCH v2 12/15] usb: dwc2: Add hibernation exiting flow by system resume

Minas Harutyunyan
2021-04-19T07:32:13Z

On 4/16/2021 4:48 PM, Artur Petrosyan wrote:
> Adds a new flow of exiting hibernation when PC is resumed
> from suspend state.
>
> Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>

> ---
> Changes in v2:
> - None
>
> drivers/usb/dwc2/hcd.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index 92848629cc61..035d4911a3c3 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -4470,6 +4470,16 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
> set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
> break;
> case DWC2_POWER_DOWN_PARAM_HIBERNATION:
> + ret = dwc2_exit_hibernation(hsotg, 0, 0, 1);
> + if (ret)
> + dev_err(hsotg->dev, "exit hibernation failed.\n");
> +
> + /*
> + * Set HW accessible bit before powering on the controller
> + * since an interrupt may rise.
> + */
> + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
> + break;
> case DWC2_POWER_DOWN_PARAM_NONE:
> /*
> * If not hibernation nor partial power down are supported,
>