Hi Frank, On 12/24/2018 7:04 PM, Frank Mori Hess wrote: > Hi Minas, > > On Mon, Dec 24, 2018 at 12:41 AM Minas Harutyunyan > <minas.harutyunyan@xxxxxxxxxxxx> wrote: >> >>> >>> With DEBUG defined in dwc2/core_intr.c I get: >>> >>> #unplugging >>> [ 364.111260] dwc2 ffb00000.usb: GINTSTS_ErlySusp >>> [ 364.115831] dwc2 ffb00000.usb: gintsts=04008828 gintmsk=d08c3cc4 >>> [ 364.121906] dwc2 ffb00000.usb: USB SUSPEND >>> [ 364.125994] dwc2 ffb00000.usb: dwc2_handle_usb_suspend_intr: DSTS=0x3cf701 >>> [ 364.132844] dwc2 ffb00000.usb: DSTS.Suspend Status=1 HWCFG4.Power >>> Optimize=0 HWCFG4.Hibernation=0 >>> >> You didn't see dummy USBRst interrupt on disconnect, follow to above >> interrupts? >> > > No, I only see the suspend interrupt when pulling the plug. The > USBRst happens after plugging back in. It's actually not a problem > for my use case if the device just appears suspended while the cable > is disconnected, the problem is when the cable is plugged back in and > the device still appears to be suspended. So it's ok if the gadget > disconnect doesn't happen until I plug back in. Locally, I've > addressed the problem by making the gadget/composite.c clear > cdev->suspended in its gadget reset/disconnect handler. I also made > dwc2 generate gadget reset events, just because they seemed to have > been overlooked (libcomposite uses the same handler for disconnect and > reset so it doesn't make much difference in my case). > > One other fact that may be relevant, I'm using a normal A/B usb cable, > not an OTG cable. So maybe that takes the OTG HNP and SRP protocols > our of play and suppresses the session end interrupt? > Which type of receptacle on the board? Please provide full register dump. Thanks, Minas >> >>> #plugging back in >>> [ 526.407546] dwc2 ffb00000.usb: EnumDone (DSTS=0x003cf000) >>> [ 526.412936] dwc2 ffb00000.usb: new device is high-speed >>> [ 526.470634] dwc2 ffb00000.usb: GINTSTS_ErlySusp >>> [ 526.475204] dwc2 ffb00000.usb: dwc2_hsotg_irq: USBRst >>> [ 526.527561] dwc2 ffb00000.usb: EnumDone (DSTS=0x000e0000) >>> [ 526.532953] dwc2 ffb00000.usb: new device is high-speed >>> [ 526.587560] dwc2 ffb00000.usb: new address 6 >>> [ 526.620544] g_serial gadget: high-speed config #2: CDC ACM config >>> > > >
