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    Subject[PATCH v8 3/6] 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>
    Reviewed-by: Matthias Kaehlcke <mka@chromium.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 ba74ad7..ef96a5f 100644
    --- a/drivers/usb/dwc3/core.c
    +++ b/drivers/usb/dwc3/core.c
    @@ -1738,7 +1738,7 @@ 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;
    }
    @@ -1799,13 +1799,16 @@ 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
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