linux-kernel - Re: [PATCH v10 6/6] usb: dwc3: qcom: Enable the interrupts during probe

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Message-ID: <bd9992de-3cd7-d07e-f8e3-e4f7a1e37cfc@quicinc.com>
Date:   Tue, 18 Jan 2022 12:00:15 +0530
From:   Sandeep Maheswaram <quic_c_sanm@...cinc.com>
To:     Steev Klimaszewski <steev@...i.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        "Matthias Kaehlcke" <mka@...omium.org>,
        Mathias Nyman <mathias.nyman@...el.com>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <quic_pkondeti@...cinc.com>,
        <quic_ppratap@...cinc.com>
Subject: Re: [PATCH v10 6/6] usb: dwc3: qcom: Enable the interrupts during
 probe

Hi Steev,

On 1/18/2022 11:42 AM, Steev Klimaszewski wrote:
>
> On 1/16/22 11:44 PM, Sandeep Maheswaram wrote:
>> Enable the interrupts during probe and remove the disable interrupts
>> function.
>>
>> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@...cinc.com>
>> ---
>>   drivers/usb/dwc3/dwc3-qcom.c | 28 ++++------------------------
>>   1 file changed, 4 insertions(+), 24 deletions(-)
>>
>> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
>> index 54dc3d3..7c5e636 100644
>> --- a/drivers/usb/dwc3/dwc3-qcom.c
>> +++ b/drivers/usb/dwc3/dwc3-qcom.c
>> @@ -306,25 +306,7 @@ static void dwc3_qcom_enable_wakeup_irq(int irq)
>>       enable_irq_wake(irq);
>>   }
>>   -static void dwc3_qcom_disable_wakeup_irq(int irq)
>> -{
>> -    if (!irq)
>> -        return;
>> -
>> -    disable_irq_wake(irq);
>> -    disable_irq_nosync(irq);
>> -}
>>   -static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
>> -{
>> -    dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);
>> -
>> -    dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
>> -
>> -    dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
>> -
>> -    dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
>> -}
>>     static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
>>   {
>> @@ -356,9 +338,6 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
>>       if (ret)
>>           dev_warn(qcom->dev, "failed to disable interconnect: %d\n", 
>> ret);
>>   -    if (device_may_wakeup(qcom->dev))
>> -        dwc3_qcom_enable_interrupts(qcom);
>> -
>>       qcom->is_suspended = true;
>>         return 0;
>> @@ -372,9 +351,6 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
>>       if (!qcom->is_suspended)
>>           return 0;
>>   -    if (device_may_wakeup(qcom->dev))
>> -        dwc3_qcom_disable_interrupts(qcom);
>> -
>>       for (i = 0; i < qcom->num_clocks; i++) {
>>           ret = clk_prepare_enable(qcom->clks[i]);
>>           if (ret < 0) {
>> @@ -832,6 +808,10 @@ static int dwc3_qcom_probe(struct 
>> platform_device *pdev)
>>       genpd->flags |= GENPD_FLAG_ALWAYS_ON;
>>         device_init_wakeup(&pdev->dev, 1);
>> +
>> +    if (device_may_wakeup(qcom->dev))
>> +        dwc3_qcom_enable_interrupts(qcom);
>> +
>>       qcom->is_suspended = false;
>>       pm_runtime_set_active(dev);
>>       pm_runtime_enable(dev);
>
> Hi Sandeep,
>
> I was testing this series on my Lenovo Yoga C630, and with this patch 
> in particular applied, my system will no longer boot. Unfortunately I 
> don't get any sort of good output at all, I just get hung tasks when 
> trying to probe things it would seem.
>
>
> With the other 5 patches in the series applied, the system still boots 
> and works correctly.
>
>
> -- Steev
>
Will check this. Is your controller in host mode or device mode?

Regards

Sandeep