From: Roger Quadros <rogerq@ti.com>
To: <balbi@kernel.org>
Cc: <nsekhar@ti.com>, <linux-usb@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, Roger Quadros <rogerq@ti.com>
Subject: [PATCH 0/2] usb: dwc3: gadget: Fix erratic interrupts and delayed enumeration
Date: Wed, 16 Mar 2016 15:05:49 +0200 [thread overview]
Message-ID: <1458133551-3071-1-git-send-email-rogerq@ti.com> (raw)
Hi,
The existing workaround (for STAR#9000525659) of forcing
DEVSPD to SUPER_SPEED for HIGH_SPEED ports is causing
another side effect which causes erratic interrupts and delayed gadget
enumeration of upto 2 seconds.
Work around the run/stop issue by detecting if
it happened using debug LTSSM state and issuing
soft reset to the device controller when changing RUN_STOP
from 0 to 1.
We apply the workaround only if PRTCAP is DEVICE mode
as we don't yet support this workaround in OTG mode.
Use USB RESET event as exit condition for workaround.
cheers,
-roger
Roger Quadros (2):
usb: dwc3: core: Introduce dwc3_device_reinit()
usb: dwc3: gadget: usb: dwc3: run/stop metastability workaround
drivers/usb/dwc3/core.c | 142 +++++++++++++++++++++++++------------
drivers/usb/dwc3/core.h | 4 ++
drivers/usb/dwc3/gadget.c | 175 +++++++++++++++++++++++++++++++++++++---------
3 files changed, 246 insertions(+), 75 deletions(-)
--
2.5.0
next reply other threads:[~2016-03-16 13:06 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-16 13:05 Roger Quadros [this message]
2016-03-16 13:05 ` [PATCH 1/2] usb: dwc3: core: Introduce dwc3_device_reinit() Roger Quadros
2016-03-16 13:12 ` Felipe Balbi
2016-03-16 13:55 ` Felipe Balbi
2016-03-18 19:17 ` John Youn
2016-03-21 7:14 ` Felipe Balbi
2016-03-21 18:39 ` John Youn
2016-03-22 6:39 ` Felipe Balbi
2016-03-24 0:40 ` John Youn
2016-03-24 6:51 ` Felipe Balbi
2016-03-30 18:44 ` John Youn
2016-03-31 14:02 ` Roger Quadros
2016-03-31 14:26 ` Felipe Balbi
2016-04-04 7:50 ` Roger Quadros
2016-04-04 8:10 ` Felipe Balbi
2016-04-04 20:35 ` Shankar, Abhishek
2016-04-11 12:37 ` Roger Quadros
2016-04-11 12:51 ` Felipe Balbi
2016-04-11 12:58 ` Roger Quadros
2016-04-11 13:28 ` Felipe Balbi
2016-03-16 13:05 ` [PATCH 2/2] usb: dwc3: gadget: usb: dwc3: run/stop metastability workaround Roger Quadros
2016-03-16 13:14 ` Felipe Balbi
2016-03-16 13:27 ` Roger Quadros
2016-03-16 13:08 ` [PATCH 0/2] usb: dwc3: gadget: Fix erratic interrupts and delayed enumeration Felipe Balbi
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