[PATCH 2/2] drm/amdgpu: init iommu after amdkfd device init

[youling 257]

drm/amdgpu: init iommu after amdkfd device init
but CONFIG_AMD_IOMMU=y CONFIG_AMD_IOMMU_V2=y
[    0.203386] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel at suse.de>
[    0.203387] AMD-Vi: AMD IOMMUv2 functionality not available on this system
[    7.622052] kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[    7.622128] kfd kfd: amdgpu: error getting iommu info. is the iommu enabled?
[    7.622129] kfd kfd: amdgpu: Error initializing iommuv2
[    7.622430] kfd kfd: amdgpu: device 1002:15d8 NOT added due to errors

2021-10-11 14:13 GMT+08:00, youling257 <youling257 at gmail.com>:
> my kernel config CONFIG_AMD_IOMMU=y CONFIG_AMD_IOMMU_V2=y.
> linux kernel 5.15rc2 "drm/amdgpu: move iommu_resume before ip init/resume"
> cause my amd 3400g suspend to disk resume failed, have to press power button
> to force shutdown.
> linux kernel 5.15rc5 "drm/amdgpu: init iommu after amdkfd device init" cause
> my amd 3400g blackscreen when boot enter my userspace.
> i need revert "drm/amdgpu: init iommu after amdkfd device init" and
> "drm/amdgpu: move iommu_resume before ip init/resume" for my userspace,
> running androidx86 with mesa21.3 on amdgpu.
>