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dwc3-msm: Check usb role switch status

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If extcon handler is present and dpdm regulator is absent, current
code starts USB state machine without checking usb role switch status.
This results into USB PHY being reset while ADSP firmware is performing
charger detection. This may result into wrong/invalid charger detection
instead of SDP causing no USB enumeration. Fix this issue by checking
usb role switch status before kicking USB state machine.

Change-Id: Ic25083a74ac867eeb3869588c3060e6bf05e4007
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
This commit is contained in:
Mayank Rana 2020-03-23 10:39:31 -07:00
commit 0d9ddf2e82
1 changed files with 14 additions and 9 deletions
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23
drivers/usb/dwc3/dwc3-msm.c
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@ -4167,6 +4167,16 @@ static int dwc3_msm_probe(struct platform_device *pdev)
mutex_init(&mdwc->suspend_resume_mutex);
if (of_property_read_bool(node, "usb-role-switch")) {
role_desc.fwnode = dev_fwnode(&pdev->dev);
mdwc->role_switch = usb_role_switch_register(mdwc->dev,
&role_desc);
if (IS_ERR(mdwc->role_switch)) {
ret = PTR_ERR(mdwc->role_switch);
goto put_dwc3;
}
}
if (of_property_read_bool(node, "extcon")) {
ret = dwc3_msm_extcon_register(mdwc);
if (ret)
@ -4193,18 +4203,12 @@ static int dwc3_msm_probe(struct platform_device *pdev)
regulator_register_notifier(mdwc->dpdm_reg,
&mdwc->dpdm_nb);
} else {
queue_delayed_work(mdwc->sm_usb_wq, &mdwc->sm_work, 0);
if (!mdwc->role_switch)
queue_delayed_work(mdwc->sm_usb_wq,
&mdwc->sm_work, 0);
}
}
if (of_property_read_bool(node, "usb-role-switch")) {
role_desc.fwnode = dev_fwnode(&pdev->dev);
mdwc->role_switch = usb_role_switch_register(mdwc->dev,
&role_desc);
if (IS_ERR(mdwc->role_switch))
return PTR_ERR(mdwc->role_switch);
}
if (!mdwc->role_switch && !mdwc->extcon) {
switch (dwc->dr_mode) {
case USB_DR_MODE_OTG:
@ -4244,6 +4248,7 @@ static int dwc3_msm_probe(struct platform_device *pdev)
return 0;
put_dwc3:
usb_role_switch_unregister(mdwc->role_switch);
platform_device_put(mdwc->dwc3);
for (i = 0; i < ARRAY_SIZE(mdwc->icc_paths); i++)
icc_put(mdwc->icc_paths[i]);