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| author | Karol Herbst <kherbst@redhat.com> | 2020-03-24 21:29:23 +0100 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2020-04-07 14:37:50 +1000 |
| commit | 434fdb51513bf3057ac144d152e6f2f2b509e857 (patch) | |
| tree | 40928b208f77fdd0108216812937aa111daabba6 /drivers/gpu/drm/nouveau/nouveau_drv.h | |
| parent | bc7b188023e77d69d8dd584c51e62f0e99d9e2a2 (diff) | |
| download | linux-434fdb51513bf3057ac144d152e6f2f2b509e857.tar.gz linux-434fdb51513bf3057ac144d152e6f2f2b509e857.tar.bz2 linux-434fdb51513bf3057ac144d152e6f2f2b509e857.zip | |
drm/nouveau: workaround runpm fail by disabling PCI power management on certain intel bridges
Fixes the infamous 'runtime PM' bug many users are facing on Laptops with
Nvidia Pascal GPUs by skipping said PCI power state changes on the GPU.
Depending on the used kernel there might be messages like those in demsg:
"nouveau 0000:01:00.0: Refused to change power state, currently in D3"
"nouveau 0000:01:00.0: can't change power state from D3cold to D0 (config
space inaccessible)"
followed by backtraces of kernel crashes or timeouts within nouveau.
It's still unkown why this issue exists, but this is a reliable workaround
and solves a very annoying issue for user having to choose between a
crashing kernel or higher power consumption of their Laptops.
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Mika Westerberg <mika.westerberg@intel.com>
Cc: linux-pci@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205623
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_drv.h')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_drv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index c2c332fbde97..2a6519737800 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -140,6 +140,8 @@ struct nouveau_drm { struct list_head clients; + u8 old_pm_cap; + struct { struct agp_bridge_data *bridge; u32 base; |