drm/nouveau/debugfs: Wake up GPU before doing any reclocking

karolherbst · Ben Skeggs · commit eaeb9010bb4b · 2018-07-16T18:06:29.000+10:00
Fixes various reclocking related issues on prime systems.

Signed-off-by: Karol Herbst &lt;karolherbst@gmail.com&gt;
Signed-off-by: Martin Peres &lt;martin.peres@free.fr&gt;
Signed-off-by: Ben Skeggs &lt;bskeggs@redhat.com&gt;
diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -160,7 +160,11 @@ nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
 		args.ustate = value;
 	}
 
+	ret = pm_runtime_get_sync(drm->dev);
+	if (IS_ERR_VALUE(ret) && ret != -EACCES)
+		return ret;
 	ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
+	pm_runtime_put_autosuspend(drm->dev);
 	if (ret < 0)
 		return ret;
 
