From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Date: Tue, 15 Mar 2016 17:00:07 +0100 Subject: [U-Boot] [PATCH v3 4/4] usb: Change power-on / scanning timeout handling In-Reply-To: <56E82FC5.8080101@wwwdotorg.org> References: <1457950693-564-1-git-send-email-sr@denx.de> <1457950693-564-5-git-send-email-sr@denx.de> <56E6FA17.1030705@wwwdotorg.org> <56E80B3B.2030209@denx.de> <56E82FC5.8080101@wwwdotorg.org> Message-ID: <56E83187.5010106@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 >>> >>> (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. Thanks, Stefan