[BISSECTED]: BUG: usb: dwc3: usb ports not working anymore on odroid-XU4

[BISSECTED]: BUG: usb: dwc3: usb ports not working anymore on odroid-XU4

[Richard Genoud]

Hi,
Since commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths")
(merged in 4.8), the usb ports on odroid-XU4 don't work anymore.

[ Actually, it's commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"), cf below ]

Inserting an usb key (USB2.0) on the USB3.0 port result in:
[   64.488264] xhci-hcd xhci-hcd.2.auto: Port resume took longer than 20000 msec, port status = 0xc400fe3
[   74.568156] xhci-hcd xhci-hcd.2.auto: xHCI host not responding to stop endpoint command.
[   74.574806] xhci-hcd xhci-hcd.2.auto: Assuming host is dying, halting host.
[   74.601970] xhci-hcd xhci-hcd.2.auto: HC died; cleaning up
[   74.606276] usb 3-1: USB disconnect, device number 2
[   74.613565] usb 4-1: USB disconnect, device number 2
[   74.621208] usb usb3-port1: couldn't allocate usb_device
NB: it's not related to USB2.0 devices, I get the same result with an USB3.0 device (SATA to USB3 for instance).
NB2: it doesn't happen on an odriod-XU3 board, that doesn't have the realtek RTL8153 chip.

I instrumented what was read/written in the registers before and after this patch, and I found that the culprit is:
	if (dwc->revision > DWC3_REVISION_194A)
		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
Before commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"), dwc3_phy_setup() was
done early in dwc3_probe() and thus, dwc->revision wasn't set yet (==0)
After this commit, dwc3_phy_setup() is done in dwc3_core_init(), after setting dwc->revision (it's done in dwc3_core_is_valid()).

(The dwc3->revision on odroid-XU4 is 5533200a.)

If I comment out the 2 lines:
	if (dwc->revision > DWC3_REVISION_194A)
		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
The usb key is recognized right away:
[   38.008158] usb 3-1.2: new high-speed USB device number 3 using xhci-hcd
[   38.138924] usb 3-1.2: New USB device found, idVendor=abcd, idProduct=1234
[   38.144399] usb 3-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3

I took a look at the history behind those 2 lines, and they've been introduced by:
commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores") in 3.19.
In 3.19, the dwc->revision dwc3_phy_setup() was set in dwc3_core_init().
And, booting a 3.19 kernel on XU4 gives the same error (whereas booting a 3.18 kernel is ok)

[ So, I should have started this email with:
Since commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"),
the usb ports on odroid-XU4 don't work anymore. ]

The funny thing is that commit 45bb7de213d8("usb: dwc3: setup phys earlier") (merged in 4.2)
moved dwc3_phy_setup() in dwc3_probe(), way before dwc->revision was set, acting like a revert
on commit 2164a476205c("usb: dwc3: set SUSPHY bit for all cores")
That's why on 4.2, inserting an USB key on odroid-XU4 worked again,

So, to make a resume:
xxx-> 3.18: usb ok
3.19->4.1: usb error (due to commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"))
4.2->4.7: usb ok (due to commit 45bb7de213d8("usb: dwc3: setup phys earlier"))
4.8->now: usb error (due to commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"))


any idea on this ?

regards,
Richard

Re: [BISSECTED]: BUG: usb: dwc3: usb ports not working anymore on odroid-XU4

[Felipe Balbi]

Hi,

Richard Genoud <richard.genoud@gmail.com> writes:
> Hi,
> Since commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths")
> (merged in 4.8), the usb ports on odroid-XU4 don't work anymore.
>
> [ Actually, it's commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"), cf below ]
>
> Inserting an usb key (USB2.0) on the USB3.0 port result in:
> [   64.488264] xhci-hcd xhci-hcd.2.auto: Port resume took longer than 20000 msec, port status = 0xc400fe3
> [   74.568156] xhci-hcd xhci-hcd.2.auto: xHCI host not responding to stop endpoint command.
> [   74.574806] xhci-hcd xhci-hcd.2.auto: Assuming host is dying, halting host.
> [   74.601970] xhci-hcd xhci-hcd.2.auto: HC died; cleaning up
> [   74.606276] usb 3-1: USB disconnect, device number 2
> [   74.613565] usb 4-1: USB disconnect, device number 2
> [   74.621208] usb usb3-port1: couldn't allocate usb_device
> NB: it's not related to USB2.0 devices, I get the same result with an USB3.0 device (SATA to USB3 for instance).
> NB2: it doesn't happen on an odriod-XU3 board, that doesn't have the realtek RTL8153 chip.
>
> I instrumented what was read/written in the registers before and after this patch, and I found that the culprit is:
> 	if (dwc->revision > DWC3_REVISION_194A)
> 		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> Before commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"), dwc3_phy_setup() was
> done early in dwc3_probe() and thus, dwc->revision wasn't set yet (==0)
> After this commit, dwc3_phy_setup() is done in dwc3_core_init(), after setting dwc->revision (it's done in dwc3_core_is_valid()).
>
> (The dwc3->revision on odroid-XU4 is 5533200a.)
>
> If I comment out the 2 lines:
> 	if (dwc->revision > DWC3_REVISION_194A)
> 		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> The usb key is recognized right away:
> [   38.008158] usb 3-1.2: new high-speed USB device number 3 using xhci-hcd
> [   38.138924] usb 3-1.2: New USB device found, idVendor=abcd, idProduct=1234
> [   38.144399] usb 3-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>
> I took a look at the history behind those 2 lines, and they've been introduced by:
> commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores") in 3.19.
> In 3.19, the dwc->revision dwc3_phy_setup() was set in dwc3_core_init().
> And, booting a 3.19 kernel on XU4 gives the same error (whereas booting a 3.18 kernel is ok)
>
> [ So, I should have started this email with:
> Since commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"),
> the usb ports on odroid-XU4 don't work anymore. ]
>
> The funny thing is that commit 45bb7de213d8("usb: dwc3: setup phys earlier") (merged in 4.2)
> moved dwc3_phy_setup() in dwc3_probe(), way before dwc->revision was set, acting like a revert
> on commit 2164a476205c("usb: dwc3: set SUSPHY bit for all cores")
> That's why on 4.2, inserting an USB key on odroid-XU4 worked again,
>
> So, to make a resume:
> xxx-> 3.18: usb ok
> 3.19->4.1: usb error (due to commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"))
> 4.2->4.7: usb ok (due to commit 45bb7de213d8("usb: dwc3: setup phys earlier"))
> 4.8->now: usb error (due to commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"))
>
>
> any idea on this ?

Thanks for bisecting. This could be caused by a similar case as
described at [1]. Can you check if adding quirk
"snps,dis_u3_susphy_quirk" helps ?

[1] https://marc.info/?i=2B3535C5ECE8B5419E3ECBE300772909021B3FD37E@US01WEMBX2.internal.synopsys.com

-- 
balbi

Re: [BISSECTED]: BUG: usb: dwc3: usb ports not working anymore on odroid-XU4

[Richard Genoud]

On 19/01/2017 09:03, Felipe Balbi wrote:
> 
> Hi,
> 
> Richard Genoud <richard.genoud@gmail.com> writes:
>> Hi,
>> Since commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths")
>> (merged in 4.8), the usb ports on odroid-XU4 don't work anymore.
>>
>> [ Actually, it's commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"), cf below ]
>>
>> Inserting an usb key (USB2.0) on the USB3.0 port result in:
>> [   64.488264] xhci-hcd xhci-hcd.2.auto: Port resume took longer than 20000 msec, port status = 0xc400fe3
>> [   74.568156] xhci-hcd xhci-hcd.2.auto: xHCI host not responding to stop endpoint command.
>> [   74.574806] xhci-hcd xhci-hcd.2.auto: Assuming host is dying, halting host.
>> [   74.601970] xhci-hcd xhci-hcd.2.auto: HC died; cleaning up
>> [   74.606276] usb 3-1: USB disconnect, device number 2
>> [   74.613565] usb 4-1: USB disconnect, device number 2
>> [   74.621208] usb usb3-port1: couldn't allocate usb_device
>> NB: it's not related to USB2.0 devices, I get the same result with an USB3.0 device (SATA to USB3 for instance).
>> NB2: it doesn't happen on an odriod-XU3 board, that doesn't have the realtek RTL8153 chip.
>>
>> I instrumented what was read/written in the registers before and after this patch, and I found that the culprit is:
>> 	if (dwc->revision > DWC3_REVISION_194A)
>> 		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>> Before commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"), dwc3_phy_setup() was
>> done early in dwc3_probe() and thus, dwc->revision wasn't set yet (==0)
>> After this commit, dwc3_phy_setup() is done in dwc3_core_init(), after setting dwc->revision (it's done in dwc3_core_is_valid()).
>>
>> (The dwc3->revision on odroid-XU4 is 5533200a.)
>>
>> If I comment out the 2 lines:
>> 	if (dwc->revision > DWC3_REVISION_194A)
>> 		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>> The usb key is recognized right away:
>> [   38.008158] usb 3-1.2: new high-speed USB device number 3 using xhci-hcd
>> [   38.138924] usb 3-1.2: New USB device found, idVendor=abcd, idProduct=1234
>> [   38.144399] usb 3-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>>
>> I took a look at the history behind those 2 lines, and they've been introduced by:
>> commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores") in 3.19.
>> In 3.19, the dwc->revision dwc3_phy_setup() was set in dwc3_core_init().
>> And, booting a 3.19 kernel on XU4 gives the same error (whereas booting a 3.18 kernel is ok)
>>
>> [ So, I should have started this email with:
>> Since commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"),
>> the usb ports on odroid-XU4 don't work anymore. ]
>>
>> The funny thing is that commit 45bb7de213d8("usb: dwc3: setup phys earlier") (merged in 4.2)
>> moved dwc3_phy_setup() in dwc3_probe(), way before dwc->revision was set, acting like a revert
>> on commit 2164a476205c("usb: dwc3: set SUSPHY bit for all cores")
>> That's why on 4.2, inserting an USB key on odroid-XU4 worked again,
>>
>> So, to make a resume:
>> xxx-> 3.18: usb ok
>> 3.19->4.1: usb error (due to commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"))
>> 4.2->4.7: usb ok (due to commit 45bb7de213d8("usb: dwc3: setup phys earlier"))
>> 4.8->now: usb error (due to commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"))
>>
>>
>> any idea on this ?
> 
> Thanks for bisecting. This could be caused by a similar case as
> described at [1]. Can you check if adding quirk
> "snps,dis_u3_susphy_quirk" helps ?
> 
> [1] https://marc.info/?i=2B3535C5ECE8B5419E3ECBE300772909021B3FD37E@US01WEMBX2.internal.synopsys.com
> 
Thanks for your quick answer !

yes, adding this patch:

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu4.dts b/arch/arm/boot/dts/exynos5422-odroidxu4.dts
index 2faf88627a48..c76e76bc9ade 100644
--- a/arch/arm/boot/dts/exynos5422-odroidxu4.dts
+++ b/arch/arm/boot/dts/exynos5422-odroidxu4.dts
@@ -43,6 +43,9 @@
 	status = "okay";
 };
 
+&usbdrd_dwc3_0 {
+	snps,dis_u3_susphy_quirk;
+};
 &usbdrd_dwc3_1 {
 	dr_mode = "host";
 };

removes the error "Port resume took longer than 20000 msec, port status = 0xc400fe3"
and the USB devices are detected.

Richard.

Re: [BISSECTED]: BUG: usb: dwc3: usb ports not working anymore on odroid-XU4

[Felipe Balbi]

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Hi,

Richard Genoud <richard.genoud@gmail.com> writes:
> On 19/01/2017 09:03, Felipe Balbi wrote:
>> 
>> Hi,
>> 
>> Richard Genoud <richard.genoud@gmail.com> writes:
>>> Hi,
>>> Since commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths")
>>> (merged in 4.8), the usb ports on odroid-XU4 don't work anymore.
>>>
>>> [ Actually, it's commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"), cf below ]
>>>
>>> Inserting an usb key (USB2.0) on the USB3.0 port result in:
>>> [   64.488264] xhci-hcd xhci-hcd.2.auto: Port resume took longer than 20000 msec, port status = 0xc400fe3
>>> [   74.568156] xhci-hcd xhci-hcd.2.auto: xHCI host not responding to stop endpoint command.
>>> [   74.574806] xhci-hcd xhci-hcd.2.auto: Assuming host is dying, halting host.
>>> [   74.601970] xhci-hcd xhci-hcd.2.auto: HC died; cleaning up
>>> [   74.606276] usb 3-1: USB disconnect, device number 2
>>> [   74.613565] usb 4-1: USB disconnect, device number 2
>>> [   74.621208] usb usb3-port1: couldn't allocate usb_device
>>> NB: it's not related to USB2.0 devices, I get the same result with an USB3.0 device (SATA to USB3 for instance).
>>> NB2: it doesn't happen on an odriod-XU3 board, that doesn't have the realtek RTL8153 chip.
>>>
>>> I instrumented what was read/written in the registers before and after this patch, and I found that the culprit is:
>>> 	if (dwc->revision > DWC3_REVISION_194A)
>>> 		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>>> Before commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"), dwc3_phy_setup() was
>>> done early in dwc3_probe() and thus, dwc->revision wasn't set yet (==0)
>>> After this commit, dwc3_phy_setup() is done in dwc3_core_init(), after setting dwc->revision (it's done in dwc3_core_is_valid()).
>>>
>>> (The dwc3->revision on odroid-XU4 is 5533200a.)
>>>
>>> If I comment out the 2 lines:
>>> 	if (dwc->revision > DWC3_REVISION_194A)
>>> 		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>>> The usb key is recognized right away:
>>> [   38.008158] usb 3-1.2: new high-speed USB device number 3 using xhci-hcd
>>> [   38.138924] usb 3-1.2: New USB device found, idVendor=abcd, idProduct=1234
>>> [   38.144399] usb 3-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>>>
>>> I took a look at the history behind those 2 lines, and they've been introduced by:
>>> commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores") in 3.19.
>>> In 3.19, the dwc->revision dwc3_phy_setup() was set in dwc3_core_init().
>>> And, booting a 3.19 kernel on XU4 gives the same error (whereas booting a 3.18 kernel is ok)
>>>
>>> [ So, I should have started this email with:
>>> Since commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"),
>>> the usb ports on odroid-XU4 don't work anymore. ]
>>>
>>> The funny thing is that commit 45bb7de213d8("usb: dwc3: setup phys earlier") (merged in 4.2)
>>> moved dwc3_phy_setup() in dwc3_probe(), way before dwc->revision was set, acting like a revert
>>> on commit 2164a476205c("usb: dwc3: set SUSPHY bit for all cores")
>>> That's why on 4.2, inserting an USB key on odroid-XU4 worked again,
>>>
>>> So, to make a resume:
>>> xxx-> 3.18: usb ok
>>> 3.19->4.1: usb error (due to commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"))
>>> 4.2->4.7: usb ok (due to commit 45bb7de213d8("usb: dwc3: setup phys earlier"))
>>> 4.8->now: usb error (due to commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"))
>>>
>>>
>>> any idea on this ?
>> 
>> Thanks for bisecting. This could be caused by a similar case as
>> described at [1]. Can you check if adding quirk
>> "snps,dis_u3_susphy_quirk" helps ?
>> 
>> [1] https://marc.info/?i=2B3535C5ECE8B5419E3ECBE300772909021B3FD37E@US01WEMBX2.internal.synopsys.com
>> 
> Thanks for your quick answer !
>
> yes, adding this patch:
>
> diff --git a/arch/arm/boot/dts/exynos5422-odroidxu4.dts b/arch/arm/boot/dts/exynos5422-odroidxu4.dts
> index 2faf88627a48..c76e76bc9ade 100644
> --- a/arch/arm/boot/dts/exynos5422-odroidxu4.dts
> +++ b/arch/arm/boot/dts/exynos5422-odroidxu4.dts
> @@ -43,6 +43,9 @@
>  	status = "okay";
>  };
>  
> +&usbdrd_dwc3_0 {
> +	snps,dis_u3_susphy_quirk;
> +};
>  &usbdrd_dwc3_1 {
>  	dr_mode = "host";
>  };
>
> removes the error "Port resume took longer than 20000 msec, port
> status = 0xc400fe3" and the USB devices are detected.

okay great. Temporarily, you can probably push a patch doing that to
your DTS. At least you're gonna have things working until we understand
what's going on with DWC3.

-- 
balbi

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Re: [BISSECTED]: BUG: usb: dwc3: usb ports not working anymore on odroid-XU4

[Richard Genoud]

2017-01-23 12:45 GMT+01:00 Felipe Balbi <balbi@kernel.org>:
>
> Hi,
>
> Richard Genoud <richard.genoud@gmail.com> writes:
>> On 19/01/2017 09:03, Felipe Balbi wrote:
>>>
>>> Hi,
>>>
>>> Richard Genoud <richard.genoud@gmail.com> writes:
>>>> Hi,
>>>> Since commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths")
>>>> (merged in 4.8), the usb ports on odroid-XU4 don't work anymore.
>>>>
>>>> [ Actually, it's commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"), cf below ]
>>>>
>>>> Inserting an usb key (USB2.0) on the USB3.0 port result in:
>>>> [   64.488264] xhci-hcd xhci-hcd.2.auto: Port resume took longer than 20000 msec, port status = 0xc400fe3
>>>> [   74.568156] xhci-hcd xhci-hcd.2.auto: xHCI host not responding to stop endpoint command.
>>>> [   74.574806] xhci-hcd xhci-hcd.2.auto: Assuming host is dying, halting host.
>>>> [   74.601970] xhci-hcd xhci-hcd.2.auto: HC died; cleaning up
>>>> [   74.606276] usb 3-1: USB disconnect, device number 2
>>>> [   74.613565] usb 4-1: USB disconnect, device number 2
>>>> [   74.621208] usb usb3-port1: couldn't allocate usb_device
>>>> NB: it's not related to USB2.0 devices, I get the same result with an USB3.0 device (SATA to USB3 for instance).
>>>> NB2: it doesn't happen on an odriod-XU3 board, that doesn't have the realtek RTL8153 chip.
>>>>
>>>> I instrumented what was read/written in the registers before and after this patch, and I found that the culprit is:
>>>>     if (dwc->revision > DWC3_REVISION_194A)
>>>>             reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>>>> Before commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"), dwc3_phy_setup() was
>>>> done early in dwc3_probe() and thus, dwc->revision wasn't set yet (==0)
>>>> After this commit, dwc3_phy_setup() is done in dwc3_core_init(), after setting dwc->revision (it's done in dwc3_core_is_valid()).
>>>>
>>>> (The dwc3->revision on odroid-XU4 is 5533200a.)
>>>>
>>>> If I comment out the 2 lines:
>>>>     if (dwc->revision > DWC3_REVISION_194A)
>>>>             reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>>>> The usb key is recognized right away:
>>>> [   38.008158] usb 3-1.2: new high-speed USB device number 3 using xhci-hcd
>>>> [   38.138924] usb 3-1.2: New USB device found, idVendor=abcd, idProduct=1234
>>>> [   38.144399] usb 3-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>>>>
>>>> I took a look at the history behind those 2 lines, and they've been introduced by:
>>>> commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores") in 3.19.
>>>> In 3.19, the dwc->revision dwc3_phy_setup() was set in dwc3_core_init().
>>>> And, booting a 3.19 kernel on XU4 gives the same error (whereas booting a 3.18 kernel is ok)
>>>>
>>>> [ So, I should have started this email with:
>>>> Since commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"),
>>>> the usb ports on odroid-XU4 don't work anymore. ]
>>>>
>>>> The funny thing is that commit 45bb7de213d8("usb: dwc3: setup phys earlier") (merged in 4.2)
>>>> moved dwc3_phy_setup() in dwc3_probe(), way before dwc->revision was set, acting like a revert
>>>> on commit 2164a476205c("usb: dwc3: set SUSPHY bit for all cores")
>>>> That's why on 4.2, inserting an USB key on odroid-XU4 worked again,
>>>>
>>>> So, to make a resume:
>>>> xxx-> 3.18: usb ok
>>>> 3.19->4.1: usb error (due to commit 2164a476205ccc ("usb: dwc3: set SUSPHY bit for all cores"))
>>>> 4.2->4.7: usb ok (due to commit 45bb7de213d8("usb: dwc3: setup phys earlier"))
>>>> 4.8->now: usb error (due to commit c499ff71ff2a2 ("usb: dwc3: core: re-factor init and exit paths"))
>>>>
>>>>
>>>> any idea on this ?
>>>
>>> Thanks for bisecting. This could be caused by a similar case as
>>> described at [1]. Can you check if adding quirk
>>> "snps,dis_u3_susphy_quirk" helps ?
>>>
>>> [1] https://marc.info/?i=2B3535C5ECE8B5419E3ECBE300772909021B3FD37E@US01WEMBX2.internal.synopsys.com
>>>
>> Thanks for your quick answer !
>>
>> yes, adding this patch:
>>
>> diff --git a/arch/arm/boot/dts/exynos5422-odroidxu4.dts b/arch/arm/boot/dts/exynos5422-odroidxu4.dts
>> index 2faf88627a48..c76e76bc9ade 100644
>> --- a/arch/arm/boot/dts/exynos5422-odroidxu4.dts
>> +++ b/arch/arm/boot/dts/exynos5422-odroidxu4.dts
>> @@ -43,6 +43,9 @@
>>       status = "okay";
>>  };
>>
>> +&usbdrd_dwc3_0 {
>> +     snps,dis_u3_susphy_quirk;
>> +};
>>  &usbdrd_dwc3_1 {
>>       dr_mode = "host";
>>  };
>>
>> removes the error "Port resume took longer than 20000 msec, port
>> status = 0xc400fe3" and the USB devices are detected.
>
> okay great. Temporarily, you can probably push a patch doing that to
> your DTS. At least you're gonna have things working until we understand
> what's going on with DWC3.
Ok.

Thanks !

Richard.