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| author | Paulo Zanoni <paulo.r.zanoni@intel.com> | 2014-04-01 19:55:07 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-04-01 22:36:17 +0200 |
| commit | aa0b3b5bb8768c1a6a6788869d9c7015eae7e80c (patch) | |
| tree | 01508e9667b38101f0eec2cdd87d37122b440812 /drivers/gpu | |
| parent | drm/i915: vlv: reserve the GT power context only once during driver init (diff) | |
| download | linux-aa0b3b5bb8768c1a6a6788869d9c7015eae7e80c.tar.xz linux-aa0b3b5bb8768c1a6a6788869d9c7015eae7e80c.zip | |
drm/i915: don't schedule force_wake_timer at gen6_read
So far force_wake_timer was only used by gen6_gt_force_wake_put. Since
we always had balanced gen6_gt_force_wake_get/put calls, we could
guarantee balanced calls to intel_runtime_pm_get/put.
Commit 8232644ccf099548710843e97360a3fcd6d28e04, "drm/i915: Convert
the forcewake worker into a timer func" started scheduling the
force_wake_timer at gen6_read, which resulted in an unbalanced
runtime_pm refcount.
So this commit just reverts to the old behavior until we can find a
proper way to used delayed force_wake from the register read/write
macros without leaving the runtime_pm refcounts unbalanced and without
runtime suspending the driver while forcewake is active.
Testcase: igt/pm_pc8/rte
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76544
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index c3832d9270a6..c47853bd60be 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -550,11 +550,12 @@ gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \ NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ dev_priv->uncore.funcs.force_wake_get(dev_priv, \ FORCEWAKE_ALL); \ - dev_priv->uncore.forcewake_count++; \ - mod_timer_pinned(&dev_priv->uncore.force_wake_timer, \ - jiffies + 1); \ + val = __raw_i915_read##x(dev_priv, reg); \ + dev_priv->uncore.funcs.force_wake_put(dev_priv, \ + FORCEWAKE_ALL); \ + } else { \ + val = __raw_i915_read##x(dev_priv, reg); \ } \ - val = __raw_i915_read##x(dev_priv, reg); \ REG_READ_FOOTER; \ } |