2018-05-09 11:50:20

by Chunfeng Yun

[permalink] [raw]

Subject: [PATCH] usb: gadget: composite: fill bcdUSB as 0x0320 for SuperSpeed or higher speeds

---

The USB3CV version 2.1.80 (March 26, 2018) requires all devices
( gen1, gen2, single lane, dual lane) to return the value of 0x0320
in the bcdUSB field

Signed-off-by: Chunfeng Yun <[email protected]>
---
drivers/usb/gadget/composite.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 63a7cb8..f242c2b 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1601,7 +1601,7 @@ static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf)
cdev->gadget->ep0->maxpacket;
if (gadget_is_superspeed(gadget)) {
if (gadget->speed >= USB_SPEED_SUPER) {
- cdev->desc.bcdUSB = cpu_to_le16(0x0310);
+ cdev->desc.bcdUSB = cpu_to_le16(0x0320);
cdev->desc.bMaxPacketSize0 = 9;
} else {
cdev->desc.bcdUSB = cpu_to_le16(0x0210);
--
1.9.1

2018-05-09 11:36:41

by Felipe Balbi

[permalink] [raw]

Subject: Re: [PATCH] usb: gadget: composite: fill bcdUSB as 0x0320 for SuperSpeed or higher speeds

---

Hi,

Chunfeng Yun <[email protected]> writes:
> The USB3CV version 2.1.80 (March 26, 2018) requires all devices
> ( gen1, gen2, single lane, dual lane) to return the value of 0x0320
> in the bcdUSB field

this sounds really odd. What happens when I get a USB 3.1 compliant
device off-the-shelf and run it through USB3CV? will it fail now?

Care to share a screenshot or the raw html of the test result?

--
balbi

---

Attachments:

signature.asc (847.00 B)

2018-05-10 01:49:18

by Chunfeng Yun

[permalink] [raw]

Subject: Re: [PATCH] usb: gadget: composite: fill bcdUSB as 0x0320 for SuperSpeed or higher speeds

---

Hi,

On Wed, 2018-05-09 at 14:33 +0300, Felipe Balbi wrote:
> Hi,
>
> Chunfeng Yun <[email protected]> writes:
> > The USB3CV version 2.1.80 (March 26, 2018) requires all devices
> > ( gen1, gen2, single lane, dual lane) to return the value of 0x0320
> > in the bcdUSB field
>
> this sounds really odd. What happens when I get a USB 3.1 compliant
> device off-the-shelf and run it through USB3CV? will it fail now?
It will fail, the last version require it 0x0310
>
> Care to share a screenshot or the raw html of the test result?
A screenshot is attached
>

---

Attachments:

dev_desc_test_fail.png (16.47 kB)

2018-05-15 07:24:14

by Felipe Balbi

[permalink] [raw]

Subject: Re: [PATCH] usb: gadget: composite: fill bcdUSB as 0x0320 for SuperSpeed or higher speeds

---

Hi,

Chunfeng Yun <[email protected]> writes:
> On Wed, 2018-05-09 at 14:33 +0300, Felipe Balbi wrote:
>> Hi,
>>
>> Chunfeng Yun <[email protected]> writes:
>> > The USB3CV version 2.1.80 (March 26, 2018) requires all devices
>> > ( gen1, gen2, single lane, dual lane) to return the value of 0x0320
>> > in the bcdUSB field
>>
>> this sounds really odd. What happens when I get a USB 3.1 compliant
>> device off-the-shelf and run it through USB3CV? will it fail now?
> Yes, it will fail, the last version requires it 0x0310
>>
>> Care to share a screenshot or the raw html of the test result?
> A screenshot is attached

really odd. But I'll apply the patch.

thanks

--
balbi

---

Attachments:

signature.asc (847.00 B)