[PATCH] drm/amd: Don't reset dGPUs if the system is going to s2idle

[Alex Deucher]

On Tue, May 17, 2022 at 9:39 AM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> An A+A configuration on ASUS ROG Strix G513QY proves that the ASIC
> reset for handling aborted suspend can't work with s2idle.
>
> This functionality was introduced in commit daf8de0874ab5b ("drm/amdgpu:
> always reset the asic in suspend (v2)").  A few other commits have
> gone on top of the ASIC reset, but this still doesn't work on the A+A
> configuration in s2idle.
>
> Avoid doing the reset on dGPUs specifically when using s2idle.
>
> Fixes: daf8de0874ab5b ("drm/amdgpu: always reset the asic in suspend (v2)")
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2008
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

But I think maybe we should just drop all of this in the longer term.
We are slowly dropping every case where we reset the GPU.  I'm not
even sure it actually fixes the issue it was originally added to fix
at this point because the actual reset has moved to the no-irq
callback which will most likely not get called on an aborted suspend
anyway.

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h      |  1 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 14 ++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c  |  2 +-
>  3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index 3c20c2eadf4e..9cf3d65f17d7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -1378,6 +1378,7 @@ static inline int amdgpu_acpi_smart_shift_update(struct drm_device *dev,
>
>  #if defined(CONFIG_ACPI) && defined(CONFIG_SUSPEND)
>  bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev);
> +bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev);
>  bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev);
>  #else
>  static inline bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev) { return false; }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> index 0e12315fa0cb..98ac53ee6bb5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> @@ -1045,6 +1045,20 @@ bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
>                 (pm_suspend_target_state == PM_SUSPEND_MEM);
>  }
>
> +/**
> + * amdgpu_acpi_should_gpu_reset
> + *
> + * @adev: amdgpu_device_pointer
> + *
> + * returns true if should reset GPU, false if not
> + */
> +bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
> +{
> +       if (adev->flags & AMD_IS_APU)
> +               return false;
> +       return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
> +}
> +
>  /**
>   * amdgpu_acpi_is_s0ix_active
>   *
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 16871baee784..a84766c13ac5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -2315,7 +2315,7 @@ static int amdgpu_pmops_suspend_noirq(struct device *dev)
>         struct drm_device *drm_dev = dev_get_drvdata(dev);
>         struct amdgpu_device *adev = drm_to_adev(drm_dev);
>
> -       if (!adev->in_s0ix)
> +       if (amdgpu_acpi_should_gpu_reset(adev))
>                 return amdgpu_asic_reset(adev);
>
>         return 0;
> --
> 2.34.1
>