linux-kernel - Re: [PATCH v2] usb: dwc3: qcom: enable vbus override when in OTG dr-mode

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Date:   Mon, 30 Jan 2023 14:51:59 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     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 v2] usb: dwc3: qcom: enable vbus override when in OTG
 dr-mode

On 30/01/2023 14:37, Konrad Dybcio wrote:
> 
> 
> On 24.01.2023 09:31, 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.
>>
>> Fixes: a4333c3a6ba9 ("usb: dwc3: Add Qualcomm DWC3 glue driver")
>> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>> ---
> Required for SM6115P Lenovo Tab P11 to switch to peripheral
> with otg dr_mode as well!

Thanks for testing, seems it was applied by Greg

Neil

> 
> Tested-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> 
> Konrad
>> Changes in v2:
>> - Added Bryan's reviewed-by
>> - Added Fixes tag
>> - Link to v1: https://lore.kernel.org/r/20230123-topic-sm8550-upstream-dwc3-qcom-otg-v1-1-e287a418aa5f@linaro.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 */
>>
>> ---
>> base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2
>> change-id: 20230123-topic-sm8550-upstream-dwc3-qcom-otg-81795ea148db
>>
>> Best regards,