[PATCH] drm/amd/amdgpu: S4 issue for amdgpu

[Alex Deucher]

On Thu, Sep 1, 2016 at 2:22 AM, jimqu <Jim.Qu at amd.com> wrote:
> reset the asic if adapter is not powerdown when doing freeze()
> thaw() and restore(), in order to get a valid state of adapter.
>
> Change-Id: Id2e4587c06b556eb651ab9277ffc903f780dea56
> Signed-off-by: JimQu <Jim.Qu at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 23 +++++++++++++++++------
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  4 ++--
>  2 files changed, 19 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 52cec16..5fc76bbf 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -1936,8 +1936,14 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
>                 /* Shut down the device */
>                 pci_disable_device(dev->pdev);
>                 pci_set_power_state(dev->pdev, PCI_D3hot);
> +       } else {
> +               r = amdgpu_asic_reset(adev);
> +               if (r)
> +                       DRM_ERROR("amdgpu asic reset failed\n");
>         }
>
> +       amdgpu_atombios_fini(adev);
> +

Why do you need atombios_fini() here?  All it does it free the driver
allocations.

>         if (fbcon) {
>                 console_lock();
>                 amdgpu_fbdev_set_suspend(adev, 1);
> @@ -1965,21 +1971,23 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
>         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
>                 return 0;
>
> -       if (fbcon) {
> +       if (fbcon)
>                 console_lock();
> -       }
> +
> +       amdgpu_atombios_init(adev);
> +

Same question here.  This doesn't actually change any hw state.

>         if (resume) {
>                 pci_set_power_state(dev->pdev, PCI_D0);
>                 pci_restore_state(dev->pdev);
> -               if (pci_enable_device(dev->pdev)) {
> +               if (r = pci_enable_device(dev->pdev)) {
>                         if (fbcon)
>                                 console_unlock();
> -                       return -1;
> +                       return r;
>                 }
>         }
>
>         /* post card */
> -       if (!amdgpu_card_posted(adev))
> +       if (!amdgpu_card_posted(adev) || !resume)
>                 amdgpu_atom_asic_init(adev->mode_info.atom_context);
>
>         r = amdgpu_resume(adev);
> @@ -1998,8 +2006,11 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
>         }
>
>         r = amdgpu_late_init(adev);
> -       if (r)
> +       if (r) {
> +               if (fbcon)
> +                       console_unlock();
>                 return r;
> +       }
>
>         /* pin cursors */
>         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 06816cf..02941db3 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -601,8 +601,8 @@ static const struct dev_pm_ops amdgpu_pm_ops = {
>         .resume = amdgpu_pmops_resume,
>         .freeze = amdgpu_pmops_freeze,
>         .thaw = amdgpu_pmops_thaw,
> -       .poweroff = amdgpu_pmops_freeze,
> -       .restore = amdgpu_pmops_resume,
> +       .poweroff = amdgpu_pmops_suspend,
> +       .restore = amdgpu_pmops_thaw,
>         .runtime_suspend = amdgpu_pmops_runtime_suspend,
>         .runtime_resume = amdgpu_pmops_runtime_resume,
>         .runtime_idle = amdgpu_pmops_runtime_idle,
> --
> 1.9.1
>
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