amdgpu_acpi...hift_control(9)

💖 amdgpu_acpi_power_shift_control 💖

okay bestie, so this page lives in the Kernel API Manual (that's the manual name, consider it folded in 🎀) and it's all about one very specific little function. let's get into it ✨

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🌸 NAME 🌸

amdgpu_acpi_power_shift_control — yes that's literally the whole name section, the original gave us a dash and nothing else and honestly? mysterious. iconic. we move. 💅

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🦋 SYNOPSIS 🦋

int amdgpu_acpi_power_shift_control (struct amdgpu_device *adev , u8
dev_state , bool drv_state );

that's it, that's the whole vibe check. a return type of int, and three lil params 🫶

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✨ ARGUMENTS ✨

• adev — an amdgpu_device pointer. the main character of the whole struct world 💜
• dev_state — the device acpi state, typed u8. ngl it's small but it matters.
• drv_state — the driver state, a bool. literally just true or false, no cap 🙈

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🌈 DESCRIPTION 🌈

okay so here's the tea: this function executes the POWER_SHIFT_CONTROL method 🔥 and what that does is communicate the current dGPU device state and the driver state over to APU/SBIOS. like it's the group chat messenger between your GPU and the firmware, fr fr.

and the receipts? returns 0 on success, error on failure. periodt. 💅

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👑 SEE ALSO 👑

the kernel file that houses all this magic:

./drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c

and the whole friend group of related functions — go say hi, they're all (9) and they all slay in their own way:

• amdgpu_atif_call(9)
• amdgpu_atif_parse_notification(9)
• amdgpu_atif_parse_functions(9)
• amdgpu_atif_verify_interface(9)
• amdgpu_atif_get_notification_params(9)
• amdgpu_atif_query_backlight_caps(9)
• amdgpu_atif_get_sbios_requests(9)
• amdgpu_atif_handler(9)
• amdgpu_atcs_call(9)
• amdgpu_atcs_parse_functions(9)
• amdgpu_atcs_verify_interface(9)
• amdgpu_acpi_is_pcie_performance_request_supported(9)
• amdgpu_acpi_is_power_shift_control_supported(9)
• amdgpu_acpi_pcie_notify_device_ready(9)
• amdgpu_acpi_pcie_performance_request(9)
• amdgpu_acpi_smart_shift_update(9)
• amdgpu_acpi_set_uma_allocation_size(9)
• amdgpu_acpi_get_node_id(9)
• amdgpu_acpi_event(9)
• amdgpu_acpi_init(9)
• amdgpu_acpi_fini(9)
• amdgpu_atif_pci_probe_handle(9)
• amdgpu_atcs_pci_probe_handle(9)
• amdgpu_acpi_should_gpu_reset(9)
• amdgpu_acpi_is_s3_active(9)
• amdgpu_acpi_is_s0ix_active(9)

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okay that's the whole page bestie, you ate that reading session 💖✨

sign-off time 🎀 this one came from ./drivers/gpu/drm/amd/amdgpu and it's dated October 2026 — yes, the future. we're early. we're ahead of the trend. iykyk 💅🦋