From d51a0439358d4eacd8beb39df619998d8340d232 Mon Sep 17 00:00:00 2001 From: Perry Yuan Date: Mon, 9 Feb 2026 00:42:06 +0800 Subject: drm/amdgpu: add sysfs for Peak Tops Limiter (PTL) Add per-GPU sysfs files under /sys/class/drm/cardX/device/ptl to control the Peak Tops Limiter (PTL) feature. Exposes ptl_enable (enable/disable PTL), ptl_format (set/query preferred formats), and ptl_supported_formats (list supported formats) Example usage ------------- Query PTL status: `cat /sys/class/drm/card1/device/ptl/ptl_enable` Enable PTL: `sudo bash -c "echo 1 > /sys/class/drm/card1/device/ptl/ptl_enable"` Disable PTL: `sudo bash -c "echo 0 > /sys/class/drm/card1/device/ptl/ptl_enable"` Set PTL preferred formats: `sudo bash -c "echo I8,F32 > /sys/class/drm/card1/device/ptl/ptl_format"` Query supported formats: `cat /sys/class/drm/card1/device/ptl/ptl_supported_formats` v3 changes: * move N/A to previous format in format show(Alex) * fix format check for format store(Alex) * drop the ptl declarations into amdgpu_ptl.h(Alex) v2 changes: * add usage commands in commit info (Alex) * move amdgpu_ptl_fmt into kgd_kfd_interface.h (Alex) Signed-off-by: Perry Yuan Reviewed-by: Yifan Zhang Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/include/amdgpu_ptl.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/gpu/drm/amd/include') diff --git a/drivers/gpu/drm/amd/include/amdgpu_ptl.h b/drivers/gpu/drm/amd/include/amdgpu_ptl.h index 17e803f4caf8..ffed443a14ae 100644 --- a/drivers/gpu/drm/amd/include/amdgpu_ptl.h +++ b/drivers/gpu/drm/amd/include/amdgpu_ptl.h @@ -47,4 +47,8 @@ int amdgpu_ptl_perf_monitor_ctrl(struct amdgpu_device *adev, u32 req_code, enum amdgpu_ptl_fmt *fmt1, enum amdgpu_ptl_fmt *fmt2); +int amdgpu_ptl_sysfs_init(struct amdgpu_device *adev); +void amdgpu_ptl_sysfs_fini(struct amdgpu_device *adev); + +extern const struct attribute_group amdgpu_ptl_attr_group; #endif /* __AMDGPU_PTL_H__ */ -- cgit v1.2.3