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

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Message-Id: <20230123-topic-sm8550-upstream-dwc3-qcom-otg-v2-1-2d400e598463@linaro.org>
Date:   Tue, 24 Jan 2023 09:31:21 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.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,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v2] usb: dwc3: qcom: enable vbus override when in OTG
 dr-mode

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