[PATCH v2 06/12] drm/panfrost: Expose a helper to trigger a GPU reset

[Steven Price]

On 21/06/2021 14:39, Boris Brezillon wrote:
> Expose a helper to trigger a GPU reset so we can easily trigger reset
> operations outside the job timeout handler.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>

Reviewed-by: Steven Price <steven.price at arm.com>

> ---
>  drivers/gpu/drm/panfrost/panfrost_device.h | 8 ++++++++
>  drivers/gpu/drm/panfrost/panfrost_job.c    | 4 +---
>  2 files changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
> index 2fe1550da7f8..1c6a3597eba0 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_device.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_device.h
> @@ -175,4 +175,12 @@ int panfrost_device_suspend(struct device *dev);
>  
>  const char *panfrost_exception_name(u32 exception_code);
>  
> +static inline void
> +panfrost_device_schedule_reset(struct panfrost_device *pfdev)
> +{
> +	/* Schedule a reset if there's no reset in progress. */
> +	if (!atomic_xchg(&pfdev->reset.pending, 1))
> +		schedule_work(&pfdev->reset.work);
> +}
> +
>  #endif
> diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
> index 1be80b3dd5d0..be5d3e4a1d0a 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_job.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_job.c
> @@ -458,9 +458,7 @@ static enum drm_gpu_sched_stat panfrost_job_timedout(struct drm_sched_job
>  	if (!panfrost_scheduler_stop(&pfdev->js->queue[js], sched_job))
>  		return DRM_GPU_SCHED_STAT_NOMINAL;
>  
> -	/* Schedule a reset if there's no reset in progress. */
> -	if (!atomic_xchg(&pfdev->reset.pending, 1))
> -		schedule_work(&pfdev->reset.work);
> +	panfrost_device_schedule_reset(pfdev);
>  
>  	return DRM_GPU_SCHED_STAT_NOMINAL;
>  }
>