diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-21 13:16:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-04 16:51:12 +0800 |
| commit | 9682e399d77f9bc0a5c9230bd1d69a3e75572ef1 (patch) | |
| tree | e133bc19027590ab734a279e741c0acd37e17c25 /drivers/gpu/drm/i915/i915_dma.c | |
| parent | 8bc91b60f77d174f2485e10be8708c2fd7b85bfb (diff) | |
drm/i915: fix up gt init sequence fallout
commit 181d1b9e31c668259d3798c521672afb8edd355c upstream.
The regression fix for gen6+ rps fallout
commit 7dcd2677ea912573d9ed4bcd629b0023b2d11505
Author: Konstantin Khlebnikov <khlebnikov@openvz.org>
Date: Wed Jul 17 10:22:58 2013 +0400
drm/i915: fix long-standing SNB regression in power consumption after resume
unintentionally also changed the init sequence ordering between
gt_init and gt_reset - we need to reset BIOS damage like leftover
forcewake references before we run our own code. Otherwise we can get
nasty dmesg noise like
[drm:__gen6_gt_force_wake_mt_get] *ERROR* Timed out waiting for forcewake old ack to clear.
again. Since _reset suggests that we first need to have stuff
initialized (which isn't the case here) call it sanitze instead.
While at it also block out the rps disable introduced by the above
commit on ilk: We don't have any knowledge of ilk rps being broken in
similar ways. And the disable functions uses the default hw state
which is only read out when we're enabling rps. So essentially we've
been writing random grabage into that register.
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_dma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index d1ee611d213..4d61e09bc21 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1608,8 +1608,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) intel_detect_pch(dev); intel_irq_init(dev); + intel_gt_sanitize(dev); intel_gt_init(dev); - intel_gt_reset(dev); /* Try to make sure MCHBAR is enabled before poking at it */ intel_setup_mchbar(dev); |