drm/panfrost: Expose a helper to trigger a GPU reset

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@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210630062751.2832545-8-boris.brezillon@collabora.com

drivers/gpu/drm/panfrost/panfrost_device.h

@@ -244,4 +244,12 @@ enum drm_panfrost_exception_type {
 
 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

drivers/gpu/drm/panfrost/panfrost_job.c

@@ -447,9 +447,7 @@ 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;
 }