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UPSTREAM: usb: dwc3: gadget: Change condition for processing suspend event

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Currently we process the suspend interrupt event only if the
device is in configured state. Consider a case where device
is not configured and got suspend interrupt, in that case our
gadget will still use 100mA as composite_suspend didn't happen.
But battery charging specification (BC1.2) expects a downstream
device to draw less than 2.5mA when unconnected OR suspended.

Fix this by removing the condition for processing suspend event,
and thus composite_resume would set vbus draw to 2.

Fixes: 72704f876f ("dwc3: gadget: Implement the suspend entry event handler")
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/1677217619-10261-2-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 272680990
(cherry picked from commit 4decf4060ecfee1f7a710999fcd421645ac0c419
https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ usb-next)

Change-Id: I902b8911debb7c049a4a0128077ea8d931900d1d
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
This commit is contained in:
Prashanth K 2023-02-24 11:16:58 +05:30 committed by Treehugger Robot
parent 26638f8e54
commit 87a065fb94
1 changed files with 2 additions and 9 deletions
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11
drivers/usb/dwc3/gadget.c
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@ -4210,15 +4210,8 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc,
break;
case DWC3_DEVICE_EVENT_SUSPEND:
/* It changed to be suspend event for version 2.30a and above */
if (!DWC3_VER_IS_PRIOR(DWC3, 230A)) {
/*
* Ignore suspend event until the gadget enters into
* USB_STATE_CONFIGURED state.
*/
if (dwc->gadget->state >= USB_STATE_CONFIGURED)
dwc3_gadget_suspend_interrupt(dwc,
event->event_info);
}
if (!DWC3_VER_IS_PRIOR(DWC3, 230A))
dwc3_gadget_suspend_interrupt(dwc, event->event_info);
break;
case DWC3_DEVICE_EVENT_SOF:
case DWC3_DEVICE_EVENT_ERRATIC_ERROR: