[PATCH] drm/amd/pm: Skip smu_post_init in SRIOV

[Chen, JingWen]

[AMD Public Use]

Done in v2

Best Regards,
JingWen Chen

> -----Original Message-----
> From: Chen, Guchun <Guchun.Chen at amd.com>
> Sent: Thursday, September 17, 2020 4:21 PM
> To: Chen, JingWen <JingWen.Chen2 at amd.com>; amd-
> gfx at lists.freedesktop.org
> Cc: Chen, JingWen <JingWen.Chen2 at amd.com>
> Subject: RE: [PATCH] drm/amd/pm: Skip smu_post_init in SRIOV
> 
> [AMD Public Use]
> 
> Why not moving the check in smu_post_init, and return 0 at the first early
> stage if it's SRIOV case?
> 
> Regards,
> Guchun
> 
> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Jingwen Chen
> Sent: Thursday, September 17, 2020 4:11 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Chen, JingWen <JingWen.Chen2 at amd.com>
> Subject: [PATCH] drm/amd/pm: Skip smu_post_init in SRIOV
> 
> smu_post_init needs to enable SMU feature, while this require virtualization
> off. Skip it since this feature is not used in SRIOV.
> 
> Signed-off-by: Jingwen Chen <Jingwen.Chen2 at amd.com>
> ---
>  drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> index 5c4b74f964fc..79163d0ff762 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> @@ -469,10 +469,12 @@ static int smu_late_init(void *handle)
>  	if (!smu->pm_enabled)
>  		return 0;
> 
> -	ret = smu_post_init(smu);
> -	if (ret) {
> -		dev_err(adev->dev, "Failed to post smu init!\n");
> -		return ret;
> +	if (!amdgpu_sriov_vf(adev)) {
> +		ret = smu_post_init(smu);
> +		if (ret) {
> +			dev_err(adev->dev, "Failed to post smu init!\n");
> +			return ret;
> +		}
>  	}
> 
>  	ret = smu_set_default_od_settings(smu);
> --
> 2.25.1
> 
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