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Date:      Mon, 01 Jul 2019 08:48:03 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 238037] [PATCH] Implement ig4 suspend/resume
Message-ID:  <bug-238037-227-uxIFPQ0YpD@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-238037-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-238037-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D238037

--- Comment #7 from J.R. Oldroyd <fbsd@opal.com> ---
There may be another bug.

After a suspend/resume on a Skylake system, the new ims driver (in phabrica=
tor
D16698) does not reset properly.  Reads fail with the message from the ims
driver "no data received".  A bus scan using:
    i2c -f /dev/iic1 -s
resets things after which it works ok again.

I am trying to figure out if we are still not saving and restoring all need=
ed
registers on Skylake, or if the problem is that the bus needs some
reinitialization.  I suspect the latter given that the scan clears things, =
but
I am mentioning it here too.

--=20
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