Re: [BUG] platform/x86: bitland-mifs-wmi: performance profile fails on TIMI A30 (USB-C only)

[Mingyou Chen <qby140326@gmail.com>]

On 11/3/26 16:41, okluar wrote:
> Hello,
>
> I am reporting an issue with the platform_profile interface on a
> USB-C-only machine.
>
> Hardware:
> - Model: TIMI A30 (Xiaomi Mi Notebook Pro X 15, 2021)
> - CPU: 11th Gen Intel(R) Core(TM) i7-11370H
> - iGPU: Intel Iris Xe Graphics
> - dGPU: NVIDIA GeForce RTX 3050 Ti Mobile
> - Charging: USB-C PD only (130W). No barrel-jack DC input.
> - Kernel: 7.3.1-1-cachyos (Arch-based)
> - Driver: bitland_mifs_wmi
>
> Problem:
> platform_profile_choices correctly lists:
> low-power balanced balanced-performance performance
>
> However, switching to performance fails, regardless of whether the
> USB-C charger is connected:
>    $ powerprofilesctl set performance
>    Failed to communicate with power-profiles-daemon: ... Failed to
> write to acpi_platform_profile:
>    Error writing '/sys/firmware/acpi/platform_profile': Operation not
> supported (15)
>
> Direct write also fails:
>    $ echo performance | sudo tee /sys/firmware/acpi/platform_profile
>    tee: /sys/firmware/acpi/platform_profile: Operation not supported
>
> Analysis:
> This appears to be the same root cause as other USB-C only models: the
> function bitland_check_performance_capability() requires
> WMI_SYSTEM_AC_CIRCULARHOLE (barrel-jack DC), which is physically
> impossible on this USB-C-only machine. The driver advertises the
> profile in choices but rejects writes in profile_set().
>
> I am happy to test any patches on this model. Please let me know if
> further ACPI tracing is needed.
>
> Thank you.

Hi, this problem is being fixed with the following patch series.

Please add your model to the quirks table before you test the patches.

Link to the patches: 
https://lore.kernel.org/all/20261028112742.674847-1-qby140326@gmail.com/


I take a look at your timi_a30_acpi.dat attachment, here's the quirk for 
your machine:

static const struct bitland_profile_entry timi_a30_profile_entries[] = {
     /* Change this information if it doesn't match your device. */
     { PLATFORM_PROFILE_LOW_POWER,   2 },
     { PLATFORM_PROFILE_BALANCED,    1 },
     { PLATFORM_PROFILE_PERFORMANCE, 0 },
};

static const struct bitland_mifs_quirks timi_a30_quirks = {
     .profile_entries = timi_a30_profile_entries,
     .num_profile_entries = ARRAY_SIZE(timi_a30_profile_entries),
     .return_code_at_end = false,
     .skip_ac_type_check = true,
};

static const struct dmi_system_id bitland_mifs_dmi_table[] = {
     {
         .matches = {
             /* Change this information if it doesn't match your device. */
             DMI_MATCH(DMI_SYS_VENDOR, "TIMI"),
             DMI_MATCH(DMI_PRODUCT_NAME, "A30"),
         },
         .driver_data = (void*)&timi_a30_quirks,
     },
     {}
};