On 18/08/2020 21:35, David Nolan wrote:
Hi Roger,
Thanks for your email. Apologies for the delay getting back to you. Yes, I'm connecting the camera to the Type-C port. The camera has a Micro B connector so what I have right now is a cable with a USB Type-C on one end and a Micro-B connector on the other side. Unfortunately my laptop doesn't have a USB Type-C connector so I can't check it on my own laptop. The camera supports USB 3 according to the manufacturer.
This is not the right way of connecting a device to the Type-C port. You will need a Type-C to Type-A adapter to connect non type-C peripherals.
The Adapter is important because it will tell the Type-C logic on the board to switch to DFP (Downstream facing port mode) and so turn on VBUS.
You should not need to run the script. AFAIK the port is in dual-role mode "otg" and should automatically switch to host on connecting the right adapter.
In case you have a type-c thumb drive you should be able to test this out.
My Apologies, I was incorrect on P5, it's connected to P9, the cape connector on the same side of the board as the Type-C connector.
Your point that the camera should be able to take power from USB Type-C connector perhaps could be pointing to an issue. I'm not able to get any power out of that port. Is there some setting I have to make, or a jumper or something to get that to work? Mine seems to only take power in on the Type-C connector.
Right. That's why you need to use the type-C to type-A adapter.
e.g.
https://www.amazon.com/Anker-Adapter-Converts-Technology-Compatible/dp/B01COOQIKU?ref_=fsclp_pl_dp_5
cheers,
-roger
Thanks,David
On Fri, Aug 14, 2020 at 12:56 AM Roger Quadros <rog...@ti.com> wrote:
Hi David,
On 13/08/2020 19:21, Dave wrote:
> Hi there,
>
> I'm trying to connect a USB3 camera I have to the BBAI (uname -r gives 4.14.108-ti-r131).
How are you connecting the camera to the Type-C port? Does the camera support Type-C?
If not what type-C to Type-A adaptor are you using? Does it support USB3.0? Did you verify it with your laptop's type-C port for example?
>
> I've run "sudo /opt/scripts/boot/bbai_usb_host.sh" to change the USB port from a client into a host. I'm powering my camera from the 5V on the beaglebone on P5, pin 8. However the camera is not getting detected when connected. I know the camera works as if I connect it to the USB2 port it all works perfectly.
What is P5?
Camera should be able to take power from the USB port. Why the custom power connection?
>
> lsusb gives:
>
> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>
> The relevant messages from dmesg I get are as follows:
>
> [ 578.405741] xhci-hcd xhci-hcd.2.auto: remove, state 4
> [ 578.405797] usb usb4: USB disconnect, device number 1
> [ 578.410192] xhci-hcd xhci-hcd.2.auto: USB bus 4 deregistered
> [ 578.410264] xhci-hcd xhci-hcd.2.auto: remove, state 4
> [ 578.410312] usb usb3: USB disconnect, device number 1
> [ 578.414352] xhci-hcd xhci-hcd.2.auto: USB bus 3 deregistered
> [ 578.422839] dwc3 48890000.usb: changing max_speed on rev 5533202a
> [ 579.151738] using random self ethernet address
> [ 579.151765] using random host ethernet address
> [ 579.283590] Mass Storage Function, version: 2009/09/11
> [ 579.283620] LUN: removable file: (no medium)
> [ 579.347612] using random self ethernet address
> [ 579.347640] using random host ethernet address
> [ 579.374212] usb0: HOST MAC 28:ec:9a:eb:df:84
> [ 579.374471] usb0: MAC 28:ec:9a:eb:df:85
> [ 579.388618] usb1: HOST MAC 28:ec:9a:eb:df:86
> [ 579.389016] usb1: MAC 28:ec:9a:eb:df:87
> [ 579.516850] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready
> [ 579.589767] IPv6: ADDRCONF(NETDEV_UP): usb1: link is not ready
> [ 583.176056] xhci-hcd xhci-hcd.2.auto: xHCI Host Controller
> [ 583.176124] xhci-hcd xhci-hcd.2.auto: new USB bus registered, assigned bus number 3
> [ 583.185551] xhci-hcd xhci-hcd.2.auto: hcc params 0x0220f04c hci version 0x100 quirks 0x0000000002010010
> [ 583.185633] xhci-hcd xhci-hcd.2.auto: irq 223, io mem 0x48890000
> [ 583.186576] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
> [ 583.186602] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> [ 583.186624] usb usb3: Product: xHCI Host Controller
> [ 583.186644] usb usb3: Manufacturer: Linux 4.14.108-ti-r131 xhci-hcd
> [ 583.186664] usb usb3: SerialNumber: xhci-hcd.2.auto
> [ 583.190665] hub 3-0:1.0: USB hub found
> [ 583.190793] hub 3-0:1.0: 1 port detected
> [ 583.191869] xhci-hcd xhci-hcd.2.auto: xHCI Host Controller
> [ 583.191916] xhci-hcd xhci-hcd.2.auto: new USB bus registered, assigned bus number 4
> [ 583.191961] xhci-hcd xhci-hcd.2.auto: Host supports USB 3.0 SuperSpeed
> [ 583.194273] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.
> [ 583.194695] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003
> [ 583.194721] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> [ 583.194743] usb usb4: Product: xHCI Host Controller
> [ 583.194762] usb usb4: Manufacturer: Linux 4.14.108-ti-r131 xhci-hcd
> [ 583.194781] usb usb4: SerialNumber: xhci-hcd.2.auto
> [ 583.199144] hub 4-0:1.0: USB hub found
> [ 583.201451] hub 4-0:1.0: 1 port detected
>
> I'm thinking that the line "We don't know the algorithms for LPM for this host, disabling LPM" may be pointing me to the issue, but I'm not sure what to do about it. Has anyone experienced this issue before and if so, how did you get around it? Any help you can give would be much appreciated.
No. That line is harmless. It just says that the XHCI driver doesn't undrestand the LPM mechanism so LPM will be disabled.
(LPM->Link power management)
The issue is more about signal integrity at 3.0 speeds or power sequencing of the camera.
cheers,
-roger
>
> Thanks,
> David
>
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