From: Paulo Zanoni <paulo.r.zan...@intel.com> 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.zan...@intel.com> --- drivers/gpu/drm/i915/intel_uncore.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index c3832d9..c47853b 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; \ } -- 1.8.5.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
