[PATCH] firmware: psci: handle unsupported SET_SUSPEND_MODE in PC mode

[Sudeep Holla]

On Thu, Oct 29, 2026 at 07:16:25PM +0100, Patrick Delaunay wrote:
> The PSCI specification makes PSCI_SET_SUSPEND_MODE optional. If it
> returns NOT_SUPPORTED when Linux requests platform-coordinated (PC)
> mode, Linux can assume that PC mode is in effect. Treat this response
> as success so PSCI power-domain providers can initialize when firmware
> does not support OS-initiated (OSI) mode.
> 
> Continue to report an error when OSI mode is requested but
> SET_SUSPEND_MODE is not supported.
> 

So, your platform advertises the presence/support for OSI mode and yet
opted for not implementing SET_SUSPEND_MODE ? If so, it is indeed a
firmware bug as reported.

-- 
Regards,
Sudeep