From eaeb9010bb4bcdc20e58254fa42f3fe730a7f908 Mon Sep 17 00:00:00 2001
From: Karol Herbst <karolherbst@gmail.com>
Date: Sat, 14 Jul 2018 12:52:09 +0200
Subject: [PATCH] drm/nouveau/debugfs: Wake up GPU before doing any reclocking
Git-commit: eaeb9010bb4bcdc20e58254fa42f3fe730a7f908
Patch-mainline: v4.19-rc1
References: bsc#1051510

Fixes various reclocking related issues on prime systems.

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Signed-off-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/nouveau/nouveau_debugfs.c |    4 ++++
 1 file changed, 4 insertions(+)

--- 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 *
 		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;