From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oliver Neukum <oneukum@suse.de>
Subject: Re: usbtouchscreen - runtime PM patches testing [Was: [PATCH 1/2] Input: usbtouchscreen - add support for ET&T TC4UM touchscreen controller]
Date: Wed, 14 Jul 2010 14:23:04 +0200
Message-ID: <201007141423.04634.oneukum@suse.de>
References: <20100603075720.GQ26052@ibawizard.net> <201006301504.51681.oneukum@suse.de> <20100714104327.GW15039@ibawizard.net>
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To: Petr =?utf-8?q?=C5=A0tetiar?= <ynezz@true.cz>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>, linux-input@vger.kernel.org

Am Mittwoch, 14. Juli 2010, 12:43:27 schrieb Petr =C5=A0tetiar:
> Oliver Neukum <oneukum@suse.de> [2010-06-30 15:04:51]:
>=20
> Hi,
>=20
> > 1. indeed a few suspend & resume cycles
>=20
> it seems to work, although I've tested it with the suspend to RAM onl=
y with=20
> 'echo devices > /sys/power/pm_test', the complete suspend doesn't wor=
k on my
> laptop. I hope it's enough. If the whole cycle is necessary I can try=
 to test
> it on=20
>=20
> I was testing it with 'cat /dev/input/touchscreen | od -x' and withou=
t your
> patches the device dissapeared after the resume cycle. With your patc=
hes it was
> still working fine after 5-6 suspend and resume cycles.

This is enough. Thank you.

> > 2. to know what happens if you switch runtime power management on w=
ith
> > echo "auto" >/sys/bus/usb/devices/$DEVICE/power/level
>=20
> Sorry my ignorance, but what should happen? I don't follow PM stuff t=
hat much.
> I've enabled auto and the touchscreen is still working and nothing ha=
s
> changed, is it ok?

This is quite good already. Ideally in the /sys/bus/usb/devices/$DEVICE=
/power
directory active_duration should grow slower than connected_duration.

	Regards
		Oliver
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