Commit c770ef19 authored by Kenneth Feng's avatar Kenneth Feng Committed by Alex Deucher
Browse files

drm/amd/amdgpu: disable ASPM in some situations 



disable ASPM with some ASICs on some specific platforms.
required from PCIe controller owner.

Signed-off-by: default avatarKenneth Feng <kenneth.feng@amd.com>
Reviewed-by: default avatarYang Wang <kevinyang.wang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 0ec7535f

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

+32 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ 


#if IS_ENABLED(CONFIG_X86)

#include <asm/intel-family.h>

#include <asm/cpu_device_id.h>

#endif



MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
@@ -1873,6 +1874,35 @@ static bool amdgpu_device_pcie_dynamic_switching_supported(struct amdgpu_device 
	return true;

}



static bool amdgpu_device_aspm_support_quirk(struct amdgpu_device *adev)

{

#if IS_ENABLED(CONFIG_X86)

	struct cpuinfo_x86 *c = &cpu_data(0);



	if (!(amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 0, 0) ||

		  amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 0, 1)))

		return false;



	if (c->x86 == 6 &&

		adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN5) {

		switch (c->x86_model) {

		case VFM_MODEL(INTEL_ALDERLAKE):

		case VFM_MODEL(INTEL_ALDERLAKE_L):

		case VFM_MODEL(INTEL_RAPTORLAKE):

		case VFM_MODEL(INTEL_RAPTORLAKE_P):

		case VFM_MODEL(INTEL_RAPTORLAKE_S):

			return true;

		default:

			return false;

		}

	} else {

		return false;

	}

#else

	return false;

#endif

}



/**

 * amdgpu_device_should_use_aspm - check if the device should program ASPM

 *
@@ -1897,6 +1927,8 @@ bool amdgpu_device_should_use_aspm(struct amdgpu_device *adev) 
	}

	if (adev->flags & AMD_IS_APU)

		return false;

	if (amdgpu_device_aspm_support_quirk(adev))

		return false;

	return pcie_aspm_enabled(adev->pdev);

}