From: Stephen Warren <swarren@wwwdotorg.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3 4/4] usb: Change power-on / scanning timeout handling
Date: Tue, 15 Mar 2016 10:07:03 -0600 [thread overview]
Message-ID: <56E83327.7010905@wwwdotorg.org> (raw)
In-Reply-To: <56E83187.5010106@denx.de>
On 03/15/2016 10:00 AM, Stefan Roese wrote:
> Hi Stephen,
>
> On 15.03.2016 16:52, Stephen Warren wrote:
>> On 03/15/2016 07:16 AM, Stefan Roese wrote:
>>> Hi Stephen,
>>>
>>> On 14.03.2016 18:51, Stephen Warren wrote:
>>>> On 03/14/2016 04:18 AM, Stefan Roese wrote:
>>>>> This patch changes the USB port scanning procedure and timeout
>>>>> handling in the following ways:
>>>> >..
>>>>
>>>> Tested-by: Stephen Warren <swarren@nvidia.com>
>>>>
>>>> (including some tests with a 7-port (i.e. 2 nested 4-port) USB hub maxed
>>>> out with devices).
>>>
>>> Thanks for doing those tests on your platform. I'm interested, how
>>> big the time difference between stock U-Boot and the patched
>>> version is though. Could you please post those numbers once for
>>> reference, if its not too much trouble?
>>
>> It looks like ~17s for v2016.01, and ~6s for u-boot/master from
>> yesterday plus these patches, with the following configuration:
>>
>> Tegra124 (Jetson TK1) # usb tree
>> USB device tree:
>> 1 Hub (480 Mb/s, 0mA)
>> u-boot EHCI Host Controller
>>
>> 1 Hub (480 Mb/s, 0mA)
>> | u-boot EHCI Host Controller
>> |
>> +-2 Hub (480 Mb/s, 100mA)
>> | USB2.0 Hub
>> |
>> +-3 Hub (480 Mb/s, 100mA)
>> | | USB2.0 Hub
>> | |
>> | +-6 Mass Storage (480 Mb/s, 2mA)
>> | | Sunplus Innovation Technology. USB to Serial-ATA bridge
>> FF980813AF0000000000005FF16BFF
>> | |
>> | +-7 Mass Storage (480 Mb/s, 100mA)
>> | | Generic Mass Storage Device 00000000000006
>> | |
>> | +-8 Human Interface (1.5 Mb/s, 70mA)
>> | | LITEON Technology USB Multimedia Keyboard
>> | |
>> | +-9 Human Interface (1.5 Mb/s, 100mA)
>> | Microsoft Microsoft IntelliMouse? Explore
>> |
>> +-4 Vendor specific (480 Mb/s, 250mA)
>> | ASIX Elec. Corp. AX88x72A 000001
>> |
>> +-5 Mass Storage (480 Mb/s, 200mA)
>> SanDisk Extreme AA010114140242512567
>
> Thanks.
>
> I'm wondering why your configuration takes that much longer to
> scan than mine (x86 platform). My USB configuration is not
> that different:
>
> => time usb start
> starting USB...
> USB0: USB EHCI 1.00
> scanning bus 0 for devices... 9 USB Device(s) found
>
> time: 1.815 seconds
> => usb tree
> USB device tree:
> 1 Hub (480 Mb/s, 0mA)
> | u-boot EHCI Host Controller
> |
> +-2 Hub (480 Mb/s, 0mA)
> |
> +-3 Hub (480 Mb/s, 100mA)
> | |
> | +-7 Hub (12 Mb/s, 100mA)
> |
> +-4 Hub (480 Mb/s, 0mA)
> | |
> | +-8 Mass Storage (480 Mb/s, 200mA)
> | | Kingston DataTraveler 2.0 50E549C688C4BE7189942766
> | |
> | +-9 Mass Storage (480 Mb/s, 98mA)
> | USBest Technology USB Mass Storage Device 09092207fbf0c4
> |
> +-5 Mass Storage (480 Mb/s, 200mA)
> | 6989 Intenso Alu Line EE706F5E
> |
> +-6 Mass Storage (480 Mb/s, 200mA)
> JetFlash Mass Storage Device 3281440601
>
>
> And I'm down to less than 2 seconds scanning time. Perhaps
> worth digging into at some point. But lets get this version
> upstreamed first.
I suspect my storage devices are slow; during USB enumeration I hear the
HDD quickly spinning down/up as it's reset, and I know my SD card reader
is rather slow to react (and probably requires some retries) since it
experiences:
Tegra124 (Jetson TK1) # usb start
starting USB...
USB0: USB EHCI 1.10
USB1: USB EHCI 1.10
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 1 for devices... Device NOT ready
Request Sense returned 02 3A 00
2 USB Device(s) found
I also have 2 USB controllers, one of which has nothing attached, which
might almost double the root port scan timeout alone?
prev parent reply other threads:[~2016-03-15 16:07 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-14 10:18 [U-Boot] [PATCH v3 0/4] usb: Reduce USB scanning time Stefan Roese
2016-03-14 10:18 ` [U-Boot] [PATCH v3 1/4] usb: legacy_hub_port_reset(): Speedup hub reset handling Stefan Roese
2016-03-14 10:18 ` [U-Boot] [PATCH v3 2/4] usb: Remove 200 ms delay in usb_hub_port_connect_change() Stefan Roese
2016-03-14 17:06 ` Stephen Warren
2016-03-14 10:18 ` [U-Boot] [PATCH v3 3/4] usb: Don't reset the USB hub a 2nd time Stefan Roese
2016-03-14 10:18 ` [U-Boot] [PATCH v3 4/4] usb: Change power-on / scanning timeout handling Stefan Roese
2016-03-14 12:45 ` Hans de Goede
2016-03-14 13:19 ` Stefan Roese
2016-03-14 17:31 ` Stephen Warren
2016-03-14 19:47 ` Hans de Goede
2016-03-15 9:46 ` Stefan Roese
2016-03-15 15:42 ` Stephen Warren
2016-03-14 17:51 ` Stephen Warren
2016-03-15 13:16 ` Stefan Roese
2016-03-15 15:52 ` Stephen Warren
2016-03-15 16:00 ` Stefan Roese
2016-03-15 16:07 ` Stephen Warren [this message]
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