From: "Anbazhagan, Baraneedharan" <anbazhagan@hp.com>
To: "Tian, Feng" <feng.tian@intel.com>,
"edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Subject: Re: USB hub port reset
Date: Mon, 14 Nov 2016 03:32:51 +0000 [thread overview]
Message-ID: <AT5PR84MB0276E6ED8A9176E974A702B7BABC0@AT5PR84MB0276.NAMPRD84.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <7F1BAD85ADEA444D97065A60D2E97EE566E4F108@SHSMSX101.ccr.corp.intel.com>
I didn't mean to have extra delays. Am asking whether EDKII have to be updated for 10ms reset recovery time regardless of port status to align with spec?
>From: Tian, Feng [mailto:feng.tian@intel.com]
>Sent: Sunday, November 13, 2016 7:46 PM
>To: Anbazhagan, Baraneedharan <anbazhagan@hp.com>; edk2-devel@lists.01.org
>Cc: Tian, Feng <feng.tian@intel.com>
>Subject: RE: USB hub port reset
>
>Hi, Baranee
>
>Linux wait 10 + 40 ms (TRSTRCY = 10 ms, plus extra 40 ms). Do you mean EDKII should be same with linux to wait more time?
>
>Thanks
>Feng
>
>From: Anbazhagan, Baraneedharan [mailto:anbazhagan@hp.com]
>Sent: Sunday, November 13, 2016 11:53 AM
>To: mailto:edk2-devel@lists.01.org; Tian, Feng <mailto:feng.tian@intel.com>
>Subject: USB hub port reset
>
>EDK2 have reset recovery time of 10ms for hub port based on port status reset bit but USB spec doesn't mention that port status can be used for t6/reset recovery time. Could you please clarify?
>
>USB vendor mentions EDK2 doesn't have reset recovery time on hub port reset and also highlighting EDK2 hub port reset differs from https://github.com/torvalds/linux/blob/master/drivers/usb/core/hub.c#L2789
>
>-Baranee
next prev parent reply other threads:[~2016-11-14 3:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-13 3:52 USB hub port reset Anbazhagan, Baraneedharan
2016-11-14 1:45 ` Tian, Feng
2016-11-14 3:32 ` Anbazhagan, Baraneedharan [this message]
2016-11-14 4:38 ` Tian, Feng
2016-11-14 13:46 ` Anbazhagan, Baraneedharan
2016-11-15 4:28 ` Tian, Feng
2016-11-15 23:56 ` Anbazhagan, Baraneedharan
2016-11-16 1:45 ` Tian, Feng
2016-11-16 2:00 ` Anbazhagan, Baraneedharan
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