From 4c4d9b7b6c6e676eca22585139aba5f03de74b90 Mon Sep 17 00:00:00 2001
From: Christoph Rudorff <chris@rudorff.com>
Date: Tue, 25 Mar 2025 13:44:36 +0100
Subject: [PATCH] drm/nouveau: fix hibernate on disabled GPU
Hibernate bricks the machine if a discrete GPU was disabled via
echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
The freeze and thaw handler lacks checking the GPU power state,
as suspend and resume do.
This patch add the checks and fix this issue.
Signed-off-by: Christoph Rudorff <chris@rudorff.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20250325-nouveau-fix-hibernate-v2-1-2bd5c13fb953@rudorff.com
---
drivers/gpu/drm/nouveau/nouveau_drm.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index e154d08857c55..c69139701056d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -1079,6 +1079,10 @@ nouveau_pmops_freeze(struct device *dev)
{
struct nouveau_drm *drm = dev_get_drvdata(dev);
+ if (drm->dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
+ drm->dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
+ return 0;
+
return nouveau_do_suspend(drm, false);
}
@@ -1087,6 +1091,10 @@ nouveau_pmops_thaw(struct device *dev)
{
struct nouveau_drm *drm = dev_get_drvdata(dev);
+ if (drm->dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
+ drm->dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
+ return 0;
+
return nouveau_do_resume(drm, false);
}
--
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