linux-kernel - Re: [PATCH v3 0/5] apple-gmux: support MMIO gmux type on T2 Macs

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Date:   Wed, 22 Feb 2023 18:13:31 +0000
From:   Aditya Garg <gargaditya08@...e.com>
To:     Hans de Goede <hdegoede@...hat.com>
CC:     Orlando Chamberlain <orlandoch.dev@...il.com>,
        Mark Gross <markgross@...nel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Lukas Wunner <lukas@...ner.de>,
        Seth Forshee <sforshee@...nel.org>,
        Aun-Ali Zaidi <admin@...eit.net>,
        Kerem Karabay <kekrby@...il.com>
Subject: Re: [PATCH v3 0/5] apple-gmux: support MMIO gmux type on T2 Macs

> 
> Also, another issue, I have pluymouth enabled with FRAMEBUFFER=y. After using the gmux patches, the size of the theme has become too tiny for an initial few seconds, then it gets normal. I tested this by compiling a kernel without these patches, and the bug got fixed. I also tried using acpi backlight using command line (that made me discover the `acpi_backlight=video` not working bug). Is that also related to some upstream bug?

Hi Hans

It turns out that Apple-gmux had to be loaded in the initramfs for Plymouth to work properly. So, it actually was my mistake.

Also I noticed that the respond to your patch for me to test didn’t reach since it was an HTML email. So, yes, your patch honours `acpi_backlight=video`