Re: [PATCH v1 2/2] drm/xe/pm: Wait for vram ready in resume

[Matthew Brost <matthew.brost@intel.com>]

On Mon, Apr 21, 2025 at 07:20:29PM +0530, Karthik Poosa wrote:
> Add wait for vram ready during system and runtime resume.
> This wait is there in probe and is missing during resume.
> 
> Signed-off-by: Karthik Poosa <karthik.poosa@intel.com>

Is this patch fixing anything, if so, we need a fixes tag for backports.

Matt

> ---
>  drivers/gpu/drm/xe/xe_pm.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
> index 4e112fbacada..479cbccf9ed5 100644
> --- a/drivers/gpu/drm/xe/xe_pm.c
> +++ b/drivers/gpu/drm/xe/xe_pm.c
> @@ -182,6 +182,10 @@ int xe_pm_resume(struct xe_device *xe)
>  	if (err)
>  		return err;
>  
> +	err = wait_for_vram_ready(xe);
> +	if (err)
> +		goto err;
> +
>  	xe_display_pm_resume_early(xe);
>  
>  	/*
> @@ -478,6 +482,10 @@ int xe_pm_runtime_resume(struct xe_device *xe)
>  		if (err)
>  			goto out;
>  
> +		err = wait_for_vram_ready(xe);
> +		if (err)
> +			goto out;
> +
>  		xe_display_pm_resume_early(xe);
>  
>  		/*
> -- 
> 2.25.1
>