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@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,
-- 
Neil Armstrong <neil.armstrong@linaro.org>

On 23/01/2023 09:01, 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@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,

This makes logical sense => only over-ride VBUS when !Host

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

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@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 */
> 
> ---

What commit does this fix?  Should it go to stable kernels?

thanks,

greg k-h

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@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 */
>>
>> ---
> 
> 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