linux-kernel - Re: [PATCH] asus-wmi: Support the hardware GPU MUX on some laptops

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Date:   Sat, 13 Aug 2022 12:55:33 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     "Luke D. Jones" <luke@...nes.dev>
Cc:     hdegoede@...hat.com, markgross@...nel.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] asus-wmi: Support the hardware GPU MUX on some laptops

On Sat, Aug 13, 2022 at 09:26:24PM +1200, Luke D. Jones wrote:
> Support the hardware GPU MUX switch available on some models. This
> switch can toggle the MUX between:
> 
> - 0, Dedicated mode
> - 1, Optimus mode
> 
> Optimus mode is the regular iGPU + dGPU available, while dedicated
> mode switches the system to have only the dGPU available.

Could you please integrate this with the framework provided by:

  include/linux/vga_switcheroo.h
  drivers/gpu/vga/vga_switcheroo.c

vga_switcheroo will then automatically expose a sysfs interface.

Find existing vga_switcheroo mux drivers in the tree like this,
they may serve as a template:

  git grep "struct vga_switcheroo_handler" -- :/

Thanks,

Lukas