Re: [Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported

[Krishna Chomal <krishna.chomal108@gmail.com>]

On Fri, May 15, 2026 at 08:45:41AM -0500, Bogdan Nicolae wrote:
>Hi,
>
>With a recent kernel upgrade (7.0.7-arch1-1 #1 SMP PREEMPT_DYNAMIC
>Thu, 14 May 2026 14:26:22 +0000 x86_64 GNU/Linux) I am noticing the
>following line in dmesg:
>hp_wmi: Unknown EC layout for board 8C9C. Thermal profile readback
>will be disabled. Please report this to
>platform-driver-x86@vger.kernel.org
>
>As instructed, I am reporting it

Hi Bogdan Nicolae,

Thanks for reporting. The hp-wmi driver now uses EC reads to determine
current platform profile during driver init in thermal_profile_setup()
and during power source change events in victus_s_powersource_event() as
introduced in commit eeeb4c9874bb ("platform/x86: hp-wmi: Add EC offsets
to read Victus S thermal profile").

At the time of that patch we did not have information about the EC
layout for your board, hence the warning in dmesg.

>in hope it will be supported in the future.

Just to clarify, is everything (apart from platform profile being
defaulted to "balanced" at boot) like power and fan control working
as intended? Because this is supposed to be a mere "warning", not
necessarily implying that something is broken.

>Please let me know if you need further information.
>

Please share your EC dump via:

# modprobe ec_sys
# xxd /sys/kernel/debug/ec/ec0/io

This should be sufficient to build a patch and remove the warning.

>Kind regards,
>Bogdan Nicolae