linux-kernel - Re: [PATCH] usb: dwc3: qcom: enable vbus override when in OTG dr-mode

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Date:   Tue, 24 Jan 2023 09:29:27 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: dwc3: qcom: enable vbus override when in OTG dr-mode

On 23/01/2023 10:35, Greg Kroah-Hartman wrote:
> On Mon, Jan 23, 2023 at 10:01:25AM +0100, Neil Armstrong wrote:
>> With vbus override enabled when in OTG dr_mode, Host<->Peripheral
>> switch now works on SM8550, otherwise the DWC3 seems to be stuck
>> in Host mode only.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>> ---
>>   drivers/usb/dwc3/dwc3-qcom.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
>> index b0a0351d2d8b..959fc925ca7c 100644
>> --- a/drivers/usb/dwc3/dwc3-qcom.c
>> +++ b/drivers/usb/dwc3/dwc3-qcom.c
>> @@ -901,7 +901,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>>   	qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev);
>>   
>>   	/* enable vbus override for device mode */
>> -	if (qcom->mode == USB_DR_MODE_PERIPHERAL)
>> +	if (qcom->mode != USB_DR_MODE_HOST)
>>   		dwc3_qcom_vbus_override_enable(qcom, true);
>>   
>>   	/* register extcon to override sw_vbus on Vbus change later */
>>
>> ---
> 
> What commit does this fix?  Should it go to stable kernels?

a4333c3a6ba9 usb: dwc3: Add Qualcomm DWC3 glue driver

Will resend with Fixes tag,

Neil

> 
> thanks,
> 
> greg k-h