Hi Lijo, > Specifically, I was looking for any events happening at these two > places because of the patch- > > https://elixir.bootlin.com/linux/v5.16/source/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c#L411 > > https://elixir.bootlin.com/linux/v5.16/source/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c#L653 I searched the logs generated with all drm debug messages enabled (drm.debug=0x1ff) for "device_class", "ATCS", "atcs", "ATIF", and "atif", for both f1688bd69ec4 and f9b7f3703ff9. Other than the few lines mentioning ATIF from my previous email, there weren't any matches. Since "device_class" didn't appear in the logs, we know that `amdgpu_atif_handler` was not called for either version. I also patched f9b7f3703ff9 to add the line DRM_DEBUG_DRIVER("Entered amdgpu_acpi_pcie_performance_request"); at the top (below the variable declarations) of `amdgpu_acpi_pcie_performance_request`, and then tested again with all drm debug messages enabled (0x1ff). That debug message didn't show up. So, `amdgpu_acpi_pcie_performance_request` was not called either, at least with f9b7f3703ff9. (I didn't try adding this patch to f1688bd69ec4.) Would anything else be helpful? James
