linux.git/Documentation/gpu/amdgpu/ptl.rst, branch master Linux kernel source tree Documentation/amdgpu: Add documentation for Peak Tops Limiter (PTL) sysfs interface 2026-05-11T19:55:55+00:00 Perry Yuan perry.yuan@amd.com 2026-02-08T16:42:05+00:00 aa86e750d0ff79c179772b9d3a95375c02a7d191 The PTL (Peak Tops Limiter) feature exposes per-GPU sysfs files under /sys/class/drm/cardX/device/ptl/ to allow users to enable or disable PTL, configure preferred data formats, and query supported formats. The usage of these sysfs files is not always obvious, so add documentation to describe their purpose and provide concrete usage examples. V3 changes: * format show will display preferred formats instead of N/A (Alex) Signed-off-by: Perry Yuan <perry.yuan@amd.com> Suggested-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
The PTL (Peak Tops Limiter) feature exposes per-GPU sysfs files under
/sys/class/drm/cardX/device/ptl/ to allow users to enable or disable PTL,
configure preferred data formats, and query supported formats. The usage
of these sysfs files is not always obvious, so add documentation to
describe their purpose and provide concrete usage examples.

V3 changes:
 * format show will display preferred formats instead of N/A (Alex)

Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>