Am 05.01.2018 um 05:19 schrieb Alex Deucher:
> Needed to properly flush the HDP cache with the CPU from rather
> than the GPU.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Samuel Li <Samuel.Li at amd.com>
Whole series is Reviewed-by: Christian König <christian.koenig at amd.com>.
Regards,
Christian.
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> I keep needing to resurrect these patches to test things periodically
> so I'd like to get them merged even if we don't have a pressing use
> case at the moment.
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index 642bea2c9b3a..88f41c41c70a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -1287,6 +1287,10 @@ struct amdgpu_asic_funcs {
> void (*set_pcie_lanes)(struct amdgpu_device *adev, int lanes);
> /* get config memsize register */
> u32 (*get_config_memsize)(struct amdgpu_device *adev);
> + /* flush hdp write queue */
> + void (*flush_hdp)(struct amdgpu_device *adev);
> + /* invalidate hdp read cache */
> + void (*invalidate_hdp)(struct amdgpu_device *adev);
> };
>
> /*
> @@ -1836,6 +1840,8 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
> #define amdgpu_asic_read_bios_from_rom(adev, b, l) (adev)->asic_funcs->read_bios_from_rom((adev), (b), (l))
> #define amdgpu_asic_read_register(adev, se, sh, offset, v)((adev)->asic_funcs->read_register((adev), (se), (sh), (offset), (v)))
> #define amdgpu_asic_get_config_memsize(adev) (adev)->asic_funcs->get_config_memsize((adev))
> +#define amdgpu_asic_flush_hdp(adev) (adev)->asic_funcs->flush_hdp((adev))
> +#define amdgpu_asic_invalidate_hdp(adev) (adev)->asic_funcs->invalidate_hdp((adev))
> #define amdgpu_gart_flush_gpu_tlb(adev, vmid) (adev)->gart.gart_funcs->flush_gpu_tlb((adev), (vmid))
> #define amdgpu_gart_set_pte_pde(adev, pt, idx, addr, flags) (adev)->gart.gart_funcs->set_pte_pde((adev), (pt), (idx), (addr), (flags))
> #define amdgpu_gart_get_vm_pde(adev, level, dst, flags) (adev)->gart.gart_funcs->get_vm_pde((adev), (level), (dst), (flags))
