linux-kernel - Re: [PATCH 5/5] thunderbolt: Add support for runtime PM

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Date:   Sun, 8 Jul 2018 12:56:18 +0300
From:   Yehezkel Bernat <yehezkelshb@...il.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     lukas@...ner.de, LKML <linux-kernel@...r.kernel.org>,
        Andreas Noever <andreas.noever@...il.com>,
        michael.jamet@...el.com, rjw@...ysocki.net, christian@...lner.me,
        Mario Limonciello <mario.limonciello@...l.com>
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.