Re: [PATCH v5] platform/x86: hp-wmi: Add GPU MUX switch support

[Ilpo Järvinen]

On Thu, 23 Jul 2026 20:27:34 +0300, Kürşat Abaylı wrote:

> Add support for querying and switching the graphics MUX mode on HP
> systems via WMI. This introduces the 'gpu_mux_mode' sysfs attribute
> under the hp-wmi platform device, allowing userspace tools to check
> and safely switch between available graphics modes (e.g., UMA, Hybrid,
> Discrete).
> 
> The hardware capabilities mask is primarily read using the modern
> 128-byte System Design Data query. However, to ensure backward
> compatibility with older models, a fallback mechanism is implemented.
> By mirroring the behavior of the Windows Omen Gaming Hub software, if
> the modern query fails but the MUX WMI endpoint (0x52) responds
> successfully to a read request, the driver defaults to a standard
> Hybrid + Discrete support mask (0x06).
> 
> [...]

Thank you for your contribution, it has been applied to my local
review-ilpo-next branch. Note it will show up in the public
platform-drivers-x86/review-ilpo-next branch only once I've pushed my
local branch there, which might take a while.

FYI [if applicable to your patch], as per Linus' policy change, also
fixes are mostly routed through for-next unless the fix is for a
commit introduced in the most recent cycle or is clearly a regression
fix.

The list of commits applied:
[1/1] platform/x86: hp-wmi: Add GPU MUX switch support
      commit: 59f586eb9394c7697cfcd2e1bb172c95e772559e

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 i.