Since commit 0fa9061ae8c ("drm/nouveau/mc: handle irq-related setup
ourselves"), drm_device->irq_enabled remained unset. This is needed in
order to properly wait for a vblank event in the generic drm code.
See https://bugs.freedesktop.org/show_bug.cgi?id=74195
Reported-by: Jan Janecek <janjanjanx@xxxxxxxxx>
Signed-off-by: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 3.10+
---
TBH, not sure why this fixes things, as irq_enabled == false should have
caused the vblank wait to not wait, since the condition would be
immediately true.
Jan, mind double-checking that this version of the patch fixes things
for you? Not 100% sure where you stuck the irq_enabled=true line when you
tried it out.
drivers/gpu/drm/nouveau/nouveau_drm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index bfd02410..3ba7b62 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -376,6 +376,8 @@ nouveau_drm_load(struct drm_device *dev, unsigned long flags)
if (ret)
goto fail_device;
+ dev->irq_enabled = true;
+
/* workaround an odd issue on nvc1 by disabling the device's
* nosnoop capability. hopefully won't cause issues until a
* better fix is found - assuming there is one...
@@ -475,6 +477,7 @@ nouveau_drm_remove(struct pci_dev *pdev)
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_object *device;
+ dev->irq_enabled = false;
device = drm->client.base.device;
drm_put_dev(dev);
--
1.8.3.2
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