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platform/x86: asus-wmi: Support the hardware GPU MUX on some laptops

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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.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Link: https://lore.kernel.org/r/20220813092624.6228-1-luke@ljones.dev
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Luke D. Jones 2022-08-13 21:26:24 +12:00 • committed by Hans de Goede
parent 3c3b55564a
commit 01ef026ab3
3 changed files with 66 additions and 0 deletions
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3
include/linux/platform_data/x86/asus-wmi.h
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@ -99,6 +99,9 @@
/* dgpu on/off */
#define ASUS_WMI_DEVID_DGPU 0x00090020
/* gpu mux switch, 0 = dGPU, 1 = Optimus */
#define ASUS_WMI_DEVID_GPU_MUX 0x00090016
/* DSTS masks */
#define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
#define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002