From: Lukas Wunner <lukas@wunner.de>
To: Hans de Goede <hdegoede@redhat.com>
Cc: Orlando Chamberlain <orlandoch.dev@gmail.com>,
Mark Gross <markgross@kernel.org>,
platform-driver-x86@vger.kernel.org,
linux-kernel@vger.kernel.org, Seth Forshee <sforshee@kernel.org>,
Aditya Garg <gargaditya08@live.com>,
Aun-Ali Zaidi <admin@kodeit.net>,
Kerem Karabay <kekrby@gmail.com>
Subject: Re: [PATCH v2 4/5] apple-gmux: support MMIO gmux on T2 Macs
Date: Mon, 20 Feb 2023 10:24:02 +0100 [thread overview]
Message-ID: <20230220092402.GB25532@wunner.de> (raw)
In-Reply-To: <8f2cdd8e-70a5-e2fa-6b63-45ca029e39be@redhat.com>
On Mon, Feb 20, 2023 at 09:44:54AM +0100, Hans de Goede wrote:
> On 2/19/23 14:39, Lukas Wunner wrote:
> > I believe the Mac Pro (the trashcan one) also contains a gmux and
> > an APP000B device in DSDT. I recall seeing a bug report due to a
> > splat in the gmux driver on that machine. Back then I confirmed
> > in the schematics that it does contain a gmux, though I think it's
> > only used for brightness, not GPU switching.
>
> Erm, the Mac Pro (the trashcan one) does not have an internal LCD
> panel, right? So I don't think the gmux will be used for brightness
> control there ...
Right. I see now that I even added a comment to apple-gmux.c on that
Mac Pro, I couldn't figure out back then what the gmux was for:
* (The MacPro6,1 2013 also has a gmux, however it is unclear why since it has
* dual GPUs but no built-in display.)
Thanks,
Lukas
next prev parent reply other threads:[~2023-02-20 9:24 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-16 12:23 [PATCH v2 0/5] apple-gmux: support MMIO gmux type on T2 Macs Orlando Chamberlain
2023-02-16 12:23 ` [PATCH v2 1/5] apple-gmux: use first bit to check switch state Orlando Chamberlain
2023-02-16 12:23 ` [PATCH v2 2/5] apple-gmux: refactor gmux types Orlando Chamberlain
2023-02-16 13:13 ` Hans de Goede
2023-02-16 23:24 ` Orlando Chamberlain
2023-02-16 12:23 ` [PATCH v2 3/5] apple-gmux: Use GMSP acpi method for interrupt clear Orlando Chamberlain
2023-02-16 13:07 ` Hans de Goede
2023-02-17 0:47 ` Orlando Chamberlain
2023-02-16 12:23 ` [PATCH v2 4/5] apple-gmux: support MMIO gmux on T2 Macs Orlando Chamberlain
2023-02-16 13:15 ` Hans de Goede
2023-02-16 23:25 ` Orlando Chamberlain
2023-02-16 13:27 ` Hans de Goede
2023-02-17 0:05 ` Orlando Chamberlain
2023-02-17 12:02 ` Orlando Chamberlain
2023-02-18 10:49 ` Hans de Goede
2023-02-18 12:52 ` Orlando Chamberlain
2023-02-19 13:21 ` Hans de Goede
2023-02-19 13:39 ` Lukas Wunner
2023-02-20 8:44 ` Hans de Goede
2023-02-20 9:24 ` Lukas Wunner [this message]
2023-02-16 12:23 ` [PATCH v2 5/5] apple-gmux: add debugfs interface Orlando Chamberlain
2023-02-16 13:20 ` Hans de Goede
2023-02-16 23:28 ` Orlando Chamberlain
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