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author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-21 15:16:24 +0400 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-21 17:37:02 +0400 |
commit | 181d1b9e31c668259d3798c521672afb8edd355c (patch) | |
tree | c35adc77a69304b3ee622a911b3a99f40e6a75d6 /drivers/gpu/drm/i915/i915_drv.h | |
parent | a7cd1b8fea2f341b626b255d9898a5ca5fabbf0a (diff) | |
download | linux-181d1b9e31c668259d3798c521672afb8edd355c.tar.xz |
drm/i915: fix up gt init sequence fallout
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>
Cc: stable@vger.kernel.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>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
-rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 204c3eca0fb2..d2ee3343c943 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1584,7 +1584,7 @@ void i915_handle_error(struct drm_device *dev, bool wedged); extern void intel_irq_init(struct drm_device *dev); extern void intel_hpd_init(struct drm_device *dev); extern void intel_gt_init(struct drm_device *dev); -extern void intel_gt_reset(struct drm_device *dev); +extern void intel_gt_sanitize(struct drm_device *dev); void i915_error_state_free(struct kref *error_ref); |