Re: [PATCH v2] efi: libstub: add support for the apple_set_os protocol

[Lukas Wunner]

On Mon, Jul 01, 2024 at 07:38:38AM +0200, Ard Biesheuvel wrote:
> Any thoughts on whether this should depend on CONFIG_APPLE_GMUX or not?

I tend towards *not* making it depend on CONFIG_APPLE_GMUX:

* The gpu-switch utility Orlando linked to doesn't use the apple-gmux
  driver.  (It changes EFI variables that influence to which GPU the
  EFI driver will switch on next reboot.)

* apple_set_os() has side effects beyond exposing the iGPU (such as
  switching the keyboard+trackpad access method to SPI instead of USB).
  If there are issues, they will be harder to debug if their occurrence
  depends on a Kconfig option.