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Date:      Sun, 07 Jul 2019 22:11:23 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 238037] [PATCH] Implement ig4 suspend/resume
Message-ID:  <bug-238037-227-jfzpBadwzx@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 #12 from Austin Shafer <ashafer@badland.io> ---
Created attachment 205573
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D205573&action=
=3Dedit
ig4 suspend with devidle set [needs testing]

Thanks for the input. Placing the device in the idle state before suspending
sounds like a good idea. The PCH datasheet does have a note saying this sho=
uld
be done before any resets so I think you are right. Maybe I missed something
trivial while reading the datasheets, but why in `ig4iic_attach` is this on=
ly
done for skylake and not also done for haswell?

I went ahead and added this to a new patch, it would be amazing if someone
could try it out and let me know if it makes any difference. Thanks!

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