drm/amdgpu: skip kfd-iommu suspend/resume for S0ix

[Limonciello, Mario]

On 4/5/2023 06:29, Aaron Liu wrote:
> GFX is in gfxoff mode during s0ix so we shouldn't need to
> actually execute kfd_iommu_suspend/kfd_iommu_resume operation.
> 
> Signed-off-by: Aaron Liu <aaron.liu at amd.com>
> Acked-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 +++++---
>   1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 3b6b85d9e0be..5094be94fa06 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3304,9 +3304,11 @@ static int amdgpu_device_ip_resume(struct amdgpu_device *adev)
>   {
>   	int r;
>   
> -	r = amdgpu_amdkfd_resume_iommu(adev);
> -	if (r)
> -		return r;
> +	if (!adev->in_s0ix) {
> +		r = amdgpu_amdkfd_resume_iommu(adev);
> +		if (r)
> +			return r;
> +	}
>   
>   	r = amdgpu_device_ip_resume_phase1(adev);
>   	if (r)