From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: Regression: USB OTG port breaks after a few hours in host mode on iMX6
Date: Thu, 8 Oct 2015 17:16:06 +0100 [thread overview]
Message-ID: <20151008161605.GH32532@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <BN3PR0301MB0849F94B72B10051ABE9CCA581350@BN3PR0301MB0849.namprd03.prod.outlook.com>
On Thu, Oct 08, 2015 at 09:52:52AM +0000, Peter Chen wrote:
> I can't reproduce it for 5 hours, and will change pinmux (do the same
> thing with your platform), and do the overnight test.
There's definitely something weird going on. Over night last night,
I left the Logitech universal receiver in the port, and this morning
it was indicating in /proc/interrupts:
283: 50 0 0 0 GPC 43 Edge 2184000.usb
I removed it, and now I have:
283: 50 0 1716 0 GPC 43 Edge 2184000.usb
which is increasing at a rate of 90 per minute.
Nothing in the kernel message log indicating why this may be. It looks
like runtime PM doesn't work on this port:
/sys/bus/platform/devices/2184000.usb/power/runtime_active_time:109850496
/sys/bus/platform/devices/2184000.usb/power/runtime_status:active
/sys/bus/platform/devices/2184000.usb/power/runtime_suspended_time:0
whereas the other port (which has zero interrupts) it does:
/sys/bus/platform/devices/2184200.usb/power/runtime_active_time:16924
/sys/bus/platform/devices/2184200.usb/power/runtime_status:suspended
/sys/bus/platform/devices/2184200.usb/power/runtime_suspended_time:109861760
--
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2015-10-08 16:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-07 8:22 Regression: USB OTG port breaks after a few hours in host mode on iMX6 Russell King - ARM Linux
2015-10-08 4:44 ` Peter Chen
2015-10-08 9:52 ` Peter Chen
2015-10-08 16:16 ` Russell King - ARM Linux [this message]
2015-10-09 2:08 ` Peter Chen
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