[5/7] drm/amdgpu: for S0ix, skip SMDA 5.x+ suspend/resume

[Limonciello, Mario]

+Tim

On 12/15/2022 16:10, Alex Deucher wrote:
> SDMA 5.x is part of the GFX block so it's controlled via
> GFXOFF.  Skip suspend as it should be handled the same
> as GFX.
> 
> v2: drop SDMA 4.x.  That requires special handling.
> 
> Acked-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index a99b327d5f09..5c0719c03c37 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3028,6 +3028,12 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
>   		     adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX))
>   			continue;
>   
> +		/* SDMA 5.x+ is part of GFX power domain so it's covered by GFXOFF */
> +		if (adev->in_s0ix &&
> +		    (adev->ip_versions[SDMA0_HWIP][0] >= IP_VERSION(5, 0, 0)) &&
> +		    (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SDMA))
> +			continue;
> +

I think we want to also skip MES here too, right?  That might be a 
follow up patch though.

>   		/* XXX handle errors */
>   		r = adev->ip_blocks[i].version->funcs->suspend(adev);
>   		/* XXX handle errors */