drm/amdgpu: add psp interfaces for peak tops limiter driver

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Introduce a Peak Tops Limiter (PTL) driver that dynamically caps
engine frequency to ensure delivered TOPS never exceeds a defined
TOPS_limit. This initial implementation provides core data structures
and kernel-space interfaces (set/get, enable/disable) to manage PTL state.

PTL performs a firmware handshake to initialize its state and update
predefined format types. It supports updating these format types at
runtime while user-space tools automatically switch PTL state, and
also allows explicitly switching PTL state via newly added commands.

Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Perry Yuan 2026-02-09 00:42:02 +08:00 • committed by Alex Deucher

parent e486360db8

commit 8ce9c73104

7 changed files with 168 additions and 1 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h

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

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111

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

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drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h

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drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

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drivers/gpu/drm/amd/include/amdgpu_ptl.h

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drivers/gpu/drm/amd/include/kgd_kfd_interface.h

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