Re: [PATCH] drm/amdgpu: set gfx9 onwards APU atomics support to be true

[Lang Yu <Lang.Yu@amd.com>]

On 04/30/ , Yifan Zhang wrote:
> APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather
> it is internal path w/ native atomic support. Set have_atomics_support
> to true.
> 
> Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>

Reviewed-by: Lang Yu <lang.yu@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 b57e7776055b..750eaffa81ba 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3757,6 +3757,12 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>  		adev->have_atomics_support = ((struct amd_sriov_msg_pf2vf_info *)
>  			adev->virt.fw_reserve.p_pf2vf)->pcie_atomic_ops_support_flags ==
>  			(PCI_EXP_DEVCAP2_ATOMIC_COMP32 | PCI_EXP_DEVCAP2_ATOMIC_COMP64);
> +	/* APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather it is a
> +	 * internal path natively support atomics, set have_atomics_support to true.
> +	 */
> +	else if ((adev->flags & AMD_IS_APU) &&
> +		(adev->ip_versions[GC_HWIP][0] > IP_VERSION(9, 0, 0)))
> +		adev->have_atomics_support = true;
>  	else
>  		adev->have_atomics_support =
>  			!pci_enable_atomic_ops_to_root(adev->pdev,
> -- 
> 2.37.3
>