[Intel-gfx] [PATCH] drm/i915: Drain freed object after suspend display

[Matt Atwood]

On Wed, Jun 29, 2022 at 06:47:21AM -0700, José Roberto de Souza wrote:
> Display is turned off by i915_drm_suspend() during the suspend
> procedure, removing the last reference of some gem objects that were
> used by display.
> 
> The issue is that those objects are only actually freed when
> mm.free_work executed and that can happen very late in the suspend
> process causing issues.
> So here draining all freed objects released by display fixing suspend
> issues.
> 
Reviewed-by: Matt Atwood <matthew.s.atwood at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_driver.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index 6e5849c1086f6..aa2a5ea30c7bb 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -1186,6 +1186,8 @@ static int i915_drm_suspend(struct drm_device *dev)
>  
>  	enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
>  
> +	i915_gem_drain_freed_objects(dev_priv);
> +
>  	return 0;
>  }
>  
> -- 
> 2.37.0
>