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Message-ID: <ce53ea53a51b41dca92c5f5978c45cf1@ausx13mpc120.AMER.DELL.COM>
Date:   Mon, 9 Jul 2018 04:20:00 +0000
From:   <Mario.Limonciello@...l.com>
To:     <yehezkelshb@...il.com>, <mika.westerberg@...ux.intel.com>
CC:     <lukas@...ner.de>, <linux-kernel@...r.kernel.org>,
        <andreas.noever@...il.com>, <michael.jamet@...el.com>,
        <rjw@...ysocki.net>, <christian@...lner.me>
Subject: RE: [PATCH 5/5] thunderbolt: Add support for runtime PM

> -----Original Message-----
> From: Yehezkel Bernat [mailto:yehezkelshb@...il.com]
> Sent: Sunday, July 8, 2018 2:56 AM
> To: Mika Westerberg
> Cc: lukas@...ner.de; LKML; Andreas Noever; michael.jamet@...el.com;
> rjw@...ysocki.net; christian@...lner.me; Limonciello, Mario
> Subject: Re: [PATCH 5/5] thunderbolt: Add support for runtime PM
> 
> On Sun, Jul 8, 2018 at 10:31 AM Mika Westerberg
> <mika.westerberg@...ux.intel.com> wrote:
> >
> > On Sat, Jul 07, 2018 at 11:14:01PM +0200, Lukas Wunner wrote:
> > >
> > > Because I'm fairly certain that
> > > I do not get a PME for the Light Ridge in my MacBook Pro, but I'll test
> > > this once more and modify negotiate_os_control() to grant PME control
> > > to the OS.
> >
> > I think in case of Apple hardware, they handle the in some different
> > means than PME (possibly part of chipset driver or ACPI method/event).
> 
> In addition to what already mentioned, many things have changed around power
> management during Alpine Ridge development, some of them came later as FW
> updates (and BIOS changes). Comparing Alpine ridge to Light Ridge here is
> comparing oranges to, well, Apples.

In practice I don't anticipate anyone in the industry outside of Apple wiring up TBT
with RTD3 unless it's at least Alpine Ridge or newer.

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